Updated on 2021/09/03

写真a

 
NAKANISHI Kazuki
 
Organization
Institute of Materials and Systems for Sustainability Division of Materials Research (DM) Professor
Graduate School
Graduate School of Engineering
Title
Professor

Degree 1

  1. Doctor (Engineering) ( 1991.9   Kyoto University ) 

Research Areas 2

  1. Nanotechnology/Materials / Inorganic compounds and inorganic materials chemistry

  2. Nanotechnology/Materials / Inorganic materials and properties

Research History 8

  1. Kyoto University

    2019.8

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    Country:Japan

  2. Nagoya University   Institute of Materials and Systems for Sustainability   Professor

    2019.1

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    Country:Japan

  3. University of Montpellier 2   Institute of Charles Gerhardt   Visiting Professor

    2011.9

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    Country:Japan

  4. Kyoto University   Graduate School of Science   Associate professor

    2005.5 - 2018.12

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    Country:Japan

  5. 科学技術振興機構   さきがけ研究研究員

    2000.10 - 2003.9

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    Country:Japan

  6. Johannes Gutenberg University, Mainz   Guest Professor

    2000.9 - 2000.11

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    Country:Germany

  7. Kyoto University   Graduate School of Engineering   Assistant Professor

    1995.7 - 2005.6

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    Country:Japan

  8. Kyoto University   Faculty of Engineering   Assistant

    1986.7 - 1995.6

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    Country:Japan

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Education 1

  1. Kyoto University   Graduate School, Division of Engineering   Industrial Chemistry

    1983.4 - 1985.3

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    Country: Japan

Professional Memberships 5

  1. Japanese Sol-Gel Society   President

    2019.8

  2. International Sol-Gel Society   Fellow

    2019.8

  3. Japan Society of Powder and Powder Metallurgy

  4. Chemical Society of Japan   Member

  5. Society of Polymer Science Japan   Member

Awards 6

  1. D. R. Ulrich Award

    1997.8   9th International Workshop on Glasses, Ceramics, Hybrids and Nanocomposites from Gels   For outstanding work in the field of sol-gel science and technology

    Kazuki Nakanishi

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    Award type:Award from international society, conference, symposium, etc.  Country:United Kingdom

  2. Professor Vittorio Gottardi Memorial Prize

    1999.6   International Commission on Glass   Outstanding individual accomplishments in the field of glass

    Kazuki Nakanishi

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    Award type:Award from international society, conference, symposium, etc.  Country:Czech Republic

  3. 日本セラミックス協会 学術賞

    2006.5   日本セラミックス協会   相分離を伴うゾル-ゲル法による機能性多孔材料の開発

    中西 和樹

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  4. 平成22年度科学技術分野の文部科学大臣表彰 科学技術賞(研究部門)

    2010.4   文部科学省   シリカモノリスの構造制御とHPLCの高 性能化に関する研究

    田中信男,水口博義,中西和樹

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    Country:Japan

  5. 大学発ベンチャー表彰2017 経済産業大臣賞

    2017.8   科学技術振興機構(JST)   ティエムファクトリ、YKK APとの透明断熱材の開発

    山地正洋、東克起、中西和樹

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    Country:Japan

  6. ISGS Fellow

    2019.8   Sol-Gel Society  

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    Country:Japan

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Papers 280

  1. Sol-gel based structural designs of macropores and material shapes of metal-organic framework gels Reviewed

    Hara Yosuke, Manabe Kohei, Nakanishi Kazuki, Kanamori Kazuyoshi

    MATERIALS ADVANCES   Vol. 2 ( 13 ) page: 4235 - 4239   2021.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Materials Advances  

    We have developed a general synthetic strategy to control macroporous structures and material shapes of metal-organic framework (MOF) gels via a sol-gel based structural control process. A series of 1,3,5-benzene tricarboxylic acid (BTC) based MOF gels, Cr-BTC and Zr-BTC, have been chosen as a proof of concept.

    DOI: 10.1039/d0ma01009j

    Web of Science

    Scopus

  2. Utility of glomerular Gd-IgA1 staining for indistinguishable cases of IgA nephropathy or Alport syndrome Reviewed

    Ishiko S., Tanaka A., Takeda A., Hara M., Hamano N., Koizumi M., Ueno T., Hayashi H., Kondo A., Nagai S., Aoto Y., Sakakibara N., Nagano C., Horinouchi T., Yamamura T., Ninchoji T., Shima Y., Nakanishi K., Yoshikawa N., Iijima K., Nozu K.

    Clinical and Experimental Nephrology   Vol. 25 ( 7 ) page: 779 - 787   2021.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Clinical and Experimental Nephrology  

    Background: Pathological findings in Alport syndrome frequently show mesangial proliferation and sometimes incidental IgA deposition, in addition to unique glomerular basement membrane (GBM) changes including thin basement membrane and/or lamellation. However, similar GBM abnormalities are also often observed in IgA nephropathy. Both diseases are also known to show hematuria, proteinuria, and sometimes macrohematuria when associated with viral infection. Therefore, it can be difficult to make a differential diagnosis, even based on clinical and pathological findings. Some recent articles demonstrated that galactose-deficient IgA1 (Gd-IgA1)-specific monoclonal antibody (KM55) could potentially enable incidental IgA deposition to be distinguished from IgA nephropathy. Methods: We performed comprehensive gene screening and glomerular Gd-IgA1 and type IV collagen α5 chain immunostaining for five cases with both IgA deposition and GBM changes to confirm that Gd-IgA1 can help to distinguish these two diseases. Results: Four of the cases were genetically diagnosed with Alport syndrome (Cases 1–4) and one was IgA nephropathy with massive GBM changes, which had a negative gene test result (Case 5). In Cases 1–4, glomerular Gd-IgA1 deposition was not detected, although there was positivity for IgA in the mesangial area. In Case 5, glomerular Gd-IgA1 deposition was observed. Conclusion: Gd-IgA1 expression analysis could clearly differentiate these two disorders. This approach can be applied to identify these two diseases showing identical clinical and pathological findings.

    DOI: 10.1007/s10157-021-02054-3

    Scopus

  3. Global wellposedness for the energy-critical Zakharov system below the ground state Reviewed

    Candy T., Herr S., Nakanishi K.

    Advances in Mathematics   Vol. 384   2021.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Advances in Mathematics  

    The Cauchy problem for the Zakharov system in the energy-critical dimension d=4 is considered. We prove that global well-posedness holds in the full (non-radial) energy space for any initial data with energy and wave mass below the ground state threshold. The result is based on a Strichartz estimate for the Schrödinger equation with a potential. More precisely, a Strichartz estimate is proved to hold uniformly for any potential solving the free wave equation with mass below the ground state constraint. The key new ingredient is a bilinear (adjoint) Fourier restriction estimate for solutions of the inhomogeneous Schrödinger equation with forcing in dual endpoint Strichartz spaces.

    DOI: 10.1016/j.aim.2021.107746

    Scopus

  4. The Correlation between Fluid Distribution and Swelling or Subjective Symptoms of the Trunk in Lymphedema Patients: A Preliminary Observational Study Reviewed

    Hisano F., Niwa S., Nakanishi K., Mawaki A., Murota K., Fukuyama A., Takeno Y., Watanabe S., Fujimoto E., Oshima C.

    Lymphatic Research and Biology   Vol. 19 ( 3 ) page: 269 - 273   2021.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Lymphatic Research and Biology  

    Background: Manual lymph drainage (MLD) is one of the common treatments for breast cancer-related lymphedema (BCRL). Although the primary goal of MLD is to drain the excessive fluid accumulated in the affected upper limb and trunk to an area of the body that drains usually, the use of MLD is decided based on swelling and subjective symptoms, without assessing whether there is fluid accumulated in the affected region. The purpose of this study was to examine truncal fluid distribution in a sample of BCRL patients and investigate any correlation between such fluid distribution and swelling or subjective symptoms. Methods and Results: An observational study was conducted with 13 women who had unilateral, upper extremity BCRL. Fluid distribution was evaluated by using two magnetic resonance imaging (MRI) sequences: half-Fourier acquisition single-shot turbo spin echo and three-dimensional double-echo steady-state. The presence of swelling was determined by lymphedema therapists, and subjective symptoms were measured by using a visual analog scale. On MRI, no participants had any free water signals in the trunk. However, seven had swelling and all 13 had some kind of subjective symptoms on the affected side of their trunk. Conclusions: These results suggest that swelling and subjective symptoms do not correlate with the presence of truncal fluid. For such cases, a different approach than MLD may be needed to address truncal swelling and related subjective symptoms. Checking for the presence of fluid in the truncal region may help MLD be used more appropriately.

    DOI: 10.1089/lrb.2020.0075

    Scopus

  5. Preparation of hierarchically porous spinel CoMn<inf>2</inf>O<inf>4</inf> monoliths via sol–gel process accompanied by phase separation Reviewed

    Lu X., Kanamori K., Hasegawa G., Nakanishi K.

    Journal of the American Ceramic Society   Vol. 104 ( 6 ) page: 2449 - 2459   2021.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Journal of the American Ceramic Society  

    Cobalt manganite-based hierarchically porous monoliths (HPMs) with three-dimensionally (3D) interconnected macropores and open nanopores have been prepared via the sol–gel process accompanied by phase separation. The controlled hydrolysis and polycondensation of the brominated metal alkoxides, which are generated from an incomplete reaction between epichlorohydrin and MBr2 (M = Co and Mn) in N,N-dimethylformamide (DMF), form a monolithic gel based on the two divalent metal cations. The dual-polymer strategy using polyvinylpyrrolidone (PVP) and poly(ethylene oxide) (PEO) effectively induces the spinodal decomposition, where PVP and PEO are preferentially distributed to the gel phase and fluid phase, respectively, resulting in a porous gel characterized by the co-continuous structure. The effects of DMF and PVP on the porous morphology derived from the phase separation have been systematically studied. Calcination of the as-dried gels allows for the crystallization into the spinel phase yielding hierarchically porous CoMn2O4 monoliths, which have been examined in detail by the structural and compositional analyses.

    DOI: 10.1111/jace.17662

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  6. Highly porous melamine-formaldehyde monoliths with controlled hierarchical porosity toward application as a metal scavenger Reviewed

    Nakanishi Yuki, Hara Yosuke, Miyamoto Riichi, Nakanishi Kazuki, Kanamori Kazuyoshi

    MATERIALS ADVANCES   Vol. 2 ( 8 ) page: 2604 - 2608   2021.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Materials Advances  

    We report a new synthetic strategy for melamine-formaldehyde (MF) monoliths with controlled hierarchical porosity toward metal-ion scavengers. The obtained MF monoliths possessed micro-, meso- and macroporosity, which allowed efficient adsorption performance of precious metal ions in water. Applications such as recovery/removal of metal ions are expected.

    DOI: 10.1039/d1ma00034a

    Web of Science

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  7. Tunable and Well-Defined Bimodal Porous Model Electrodes for Revealing Multiscale Structural Effects in the Nonaqueous Li-O<inf>2</inf>Electrode Process Reviewed

    Hara Y., Ono M., Matsuda S., Nakanishi K., Kanamori K., Sakaushi K.

    Journal of Physical Chemistry C   Vol. 125 ( 2 ) page: 1403 - 1413   2021.1

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Journal of Physical Chemistry C  

    Porous architecture is key in the nonaqueous lithium-oxygen (Li-O2) electrode process, which is attracting huge interest because of its application in reversible energy storage with high theoretical energy density. However, it is still challenging to understand the optimal porous structure to obtain high reversibility of the reaction. One main reason is because of instability and undefined porous structures of standard electrodes consisting of carbonaceous materials, and this issue hinders from unveiling the fundamental mechanism in the complicated electrode process. Here, we developed a new synthetic strategy to design monolithic electrodes of pure metallic nickel with controlled bimodal porous structures. The present work aims to investigate the fundamental effects of the bimodal macroporous structure in the Li-O2 electrode process under carbon-/binder-free stable model electrodes. As the result, we found that, depending on the multiscale structural configurations, the bimodal macroporous structure gave significant influences to key properties, such as the efficiency of redox-mediators, discharge overpotential, and cycling life. This work indicates that the rational design of stable and conductive porous materials is one of the promising approaches to investigate highly complicated electrochemical reactions in porous electrodes and suggest new guidelines for further development of hierarchically structured electrodes toward advanced electrochemical systems.

    DOI: 10.1021/acs.jpcc.0c10446

    Scopus

  8. Hierarchically porous monoliths based on low-valence transition metal (Cu, Co, Mn) oxides: gelation and phase separation Reviewed

    Lu Xuanming, Kanamori Kazuyoshi, Nakanishi Kazuki

    NATIONAL SCIENCE REVIEW   Vol. 7 ( 11 ) page: 1656 - 1666   2020.11

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:National Science Review  

    Hierarchically porous monoliths based on copper (Cu), cobalt (Co) and manganese (Mn) oxides with three-dimensionally (3D) interconnected macropores and open nanopores were prepared using metal bromides as precursors via a sol-gel process accompanied by phase separation. The difficulty of gelation for low-valence metal cation was overcome by introducing a highly electronegative Br atom near to the metal atom to control the rates of hydrolysis and polycondensation. The 3D interconnected macropores were obtained using appropriate polymers to induce phase separation. The domain sizes of macropores and skeletons can be controlled by reaction parameters such as concentration and/or average molecular weight of polymers, and the amount of hydrochloric acid. The crystalline metal oxide monoliths with their 3D interconnected macroporous structure preserved were obtained after heat treatment in air.

    DOI: 10.1093/nsr/nwaa103

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  9. Hierarchically porous monoliths prepared via sol–gel process accompanied by spinodal decomposition Reviewed

    Lu X., Hasegawa G., Kanamori K., Nakanishi K.

    Journal of Sol-Gel Science and Technology   Vol. 95 ( 3 ) page: 530 - 550   2020.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Journal of Sol-Gel Science and Technology  

    Hierarchically porous materials with large pores in the micrometer range and small pores in the nanometer range, where the large pores facilitate mass transport and the small pores supply numerous active sites, show superiority to materials with unimodal pores in the fields of separation and adsorption. Among all the methods used to prepare hierarchically porous monoliths (HPMs), the sol–gel process accompanied by spinodal decomposition (or phase separation) shows its advantages such as facile method, no template, precise structural control, good reproducibility, and availability for various kinds of materials. This review focuses on the specific process to prepare various types of HPMs including silica, metal oxides, metal phosphates, and metal–organic hybrids, via the sol–gel process accompanied by spinodal decomposition. The HPMs composed of organic polymer and their carbonized derivatives prepared by polymerization-induced phase separation are also covered in this review as an example of similar morphological formation in purely organic crosslinking reactions. This review directs the most attention to the preparation of monolithic gels (sol–gel process) and the control of macroporous structure (phase separation). [Figure not available: see fulltext.].

    DOI: 10.1007/s10971-020-05370-4

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  10. Variation of meso- and macroporous morphologies in resorcinol-formaldehyde (RF) gels tailored via a sol-gel process combined with soft-templating and phase separation Reviewed

    Hasegawa George, Yano Takaya, Akamatsu Hirofumi, Hayashi Katsuro, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 95 ( 3 ) page: 801 - 812   2020.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Journal of Sol-Gel Science and Technology  

    A wide-range control over multimodal pore systems in porous monoliths is a key technology for developing functional materials, as the favorable pore structures in different length scales are required to be tailored depending on their application fields. In the alkoxy-derived sol–gel systems of silica and organosilicates, the synthetic methodology of meso- and macroporous monoliths with tunable pore properties has been developed by combining the supramolecular self-assembly of a Pluronic surfactant and polymerization-induced phase-separation techniques. This strategy has been applied to the sol–gel process of phenolic resins, giving rise to the hierarchically porous polymer gels with ordered mesoporosity and the corresponding carbon monoliths after carbonization. However, the controllable size range has been limited so far. This study has explored the relationship between the starting composition and the bimodal pore properties in further detail aiming at a better control of pore properties in phenolic resins. The enlargement of mesopore size has been achieved, yet associated with broadening the mesopore size distribution and coarsening the macropore morphology, resulting in the particle aggregates. The systematical investigation also reveals that the addition of KCl can improve the micelle arrangement in macroframework and provide the narrower mesopore size distribution. [Figure not available: see fulltext.]

    DOI: 10.1007/s10971-020-05236-9

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  11. On-site formation of small Ag nanoparticles on superhydrophobic mesoporous silica for antibacterial application Reviewed

    Yang Zhu, Wu Chunhua, Kanamori Kazuyoshi, Kamei Toshiyuki, Shimada Toyoshi, Nakanishi Kazuki

    NEW JOURNAL OF CHEMISTRY   Vol. 44 ( 32 ) page: 13553 - 13556   2020.8

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:New Journal of Chemistry  

    A superhydrophobic mesoporous silica material loaded with on-site formed small Ag nanoparticles has been prepared via surface modification with octadecylsilane (C18H37SiH3) and subsequent reduction of silver acetate with residual hydrido groups on-site. The resultant material shows excellent antibacterial activity for Gram-negative E. coli and Gram-positive S. aureus. This journal is

    DOI: 10.1039/d0nj02502j

    Web of Science

    Scopus

  12. Superhydrophobic highly flexible doubly cross-linked aerogel/carbon nanotube composites as strain/pressure sensors Reviewed

    Zu G., Wang X., Kanamori K., Nakanishi K.

    Journal of Materials Chemistry B   Vol. 8 ( 22 ) page: 4883 - 4889   2020.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Journal of Materials Chemistry B  

    We report novel superhydrophobic highly flexible composites based on a doubly cross-linked (DCL) aerogel and carbon nanotubes (CNTs) for strain/pressure sensing. The DCL aerogel/CNT composite is prepared by radical polymerization of vinylmethyldimethoxysilane and vinyldimethylmethoxysilane, respectively, followed by hydrolytic co-polycondensation of the obtained polyvinylmethyldimethoxysilane and polyvinyldimethylmethoxysilane, combined with the incorporation of CNTs. Benefiting from the flexible methyl-rich DCL structure of the aerogel and conductive CNTs, the resultant DCL aerogel/CNT composite combines superhydrophobicity, high compressibility, high bendability, high elasticity, and strain- and pressure-sensitive conductivity. We demonstrate that the composite can be applied as a high-performance strain/pressure sensor for the detection of arterial pulse waves and joint bending with high sensitivity and high durability against humidity.

    DOI: 10.1039/c9tb02953b

    Scopus

    PubMed

  13. Superelastic Triple-Network Polyorganosiloxane-Based Aerogels as Transparent Thermal Superinsulators and Efficient Separators Reviewed

    Zu G., Kanamori K., Wang X., Nakanishi K., Shen J.

    Chemistry of Materials   Vol. 32 ( 4 ) page: 1595 - 1604   2020.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Chemistry of Materials  

    We report new polyorganosiloxane aerogels with superhydrophobicity, high elasticity, and high bendability based on polyvinyl-poly(dimethylsiloxane) (PVPDMS)/polymethylsilsesquioxane (PMSQ). They are synthesized by a radical polymerization/co-polycondensation strategy that involves radical polymerization of vinyldimethylmethoxysilane to obtain chainlike polyvinyldimethylmethoxysilane (PVDMMS) polymers followed by hydrolytic co-polycondensation of PVDMMS polymers and methyltrimethoxysilane combined with ambient pressure drying without any post-gelation modifications. The resultant PVPDMS/PMSQ aerogels exhibit a highly tunable triple-network structure consisting of flexible inter-cross-linked hydrocarbon polymers, poly(dimethylsiloxane), and PMSQ. The aerogels with a low content of PVPDMS exhibit small pore sizes (2-80 nm), good transparency, high surface areas, and thermal superinsulation (λ = 0.0148 W m-1 K-1), while those with a high content of PVPDMS exhibit large pore sizes (100 nm-3 μm) and excellent selective absorption for organic liquids. In addition, incorporation of graphene oxide (GO) in PVPDMS/PMSQ aerogels can afford highly flexible PVPDMS/PMSQ/GO composite aerogels, which show efficient separation of three-component water/oil/dye mixtures. These aerogels are promising in the practical applications of thermal insulation, absorption/adsorption, and separation.

    DOI: 10.1021/acs.chemmater.9b04877

    Scopus

  14. Colorless Transparent Melamine-Formaldehyde Aerogels for Thermal Insulation Reviewed

    Nakanishi Yuki, Hara Yosuke, Sakuma Wataru, Saito Tsuguyuki, Nakanishi Kazuki, Kanamori Kazuyoshi

    ACS APPLIED NANO MATERIALS   Vol. 3 ( 1 ) page: 49 - 54   2020.1

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsanm.9b02275

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  15. Self-Assembly of Metal–Organic Frameworks into Monolithic Materials with Highly Controlled Trimodal Pore Structures Reviewed

    Hara Y., Kanamori K., Nakanishi K.

    Angewandte Chemie - International Edition   Vol. 58 ( 52 ) page: 19047 - 19053   2019.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Angewandte Chemie - International Edition  

    We present a two-step template-free approach toward monolithic materials with controlled trimodal porous structures with macro-, meso-, and micropores. Our method relies on two ordering processes in discrete length scales: 1) Spontaneous formation of macroporous structures in monolithic materials by the sol–gel process through the short-range ordered self-assembly of metal–organic frameworks (MOFs), and 2) reorganization of the framework structures in a mediator solution. The Zr-terephthalate-based MOF (UiO-66-NH2) was adopted as a proof of concept. The self-assembly-induced phase separation process offered interconnected macropores with diameters ranging from 0.9 to 1.8 μm. The subsequent reorganization process converted the microporous structure from low crystalline framework to crystalline UiO-66. The resultant mesopore size within the skeletons was controlled in the range from 9 to 21 nm. This approach provides a novel way of designing spaces from nano- to micrometer scale in network-forming materials.

    DOI: 10.1002/anie.201911499

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  16. Resilient, fire-retardant and mechanically strong polyimide-polyvinylpolymethylsiloxane composite aerogel prepared via stepwise chemical liquid deposition Reviewed

    Zhang Z., Wang X., Zu G., Kanamori K., Nakanishi K., Shen J.

    Materials and Design   Vol. 183   2019.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Materials and Design  

    Resilient, fire-retardant and mechanically strong polyimide-polyvinylpolymethylsiloxane (PI-PVPMS) composite aerogels have been prepared via stepwise chemical liquid deposition (SCLD). The synthesis is based on the formation of PI-PVPMS crosslinked network structure with (3-aminopropyl)trimethoxysilane (APTMS) as a coupling agent to provide reactive sites on the backbone. We successfully realize the PI in-situ growth on the whole super-flexible PVPMS gel skeleton with this simple method. The effect of APTMS amount and deposition time on the properties of final samples is deeply investigated. The resultant PI-PVPMS composite aerogels show excellent mechanical and thermal properties. They can support at least 10,000 times of their own weight and can recover 20% from a 60% of compressive strain, with an elastic modulus of 32 MPa. For thermal performance, they can maintain their structural integrity after being subjected to the alcohol lamp outer flame of around 650 °C for 30 min. These results together with the simple synthesis process demonstrate the potential for construction materials using PI-PVPMS composite aerogels. Furthermore, the SCLD synthesis method could also be applied to prepare other composite aerogels, especially for those containing complex polymer.

    DOI: 10.1016/j.matdes.2019.108096

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  17. Superelastic Multifunctional Aminosilane-Crosslinked Graphene Aerogels for High Thermal Insulation, Three-Component Separation, and Strain/Pressure-Sensing Arrays Reviewed

    Zu G., Kanamori K., Nakanishi K., Lu X., Yu K., Huang J., Sugimura H.

    ACS Applied Materials and Interfaces   Vol. 11 ( 46 ) page: 43533 - 43542   2019.11

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:ACS Applied Materials and Interfaces  

    Aerogels have attracted great interest for their unique properties, but their mechanical brittleness and poor functionality highly limit their practical applications. Herein, we report unprecedented superelastic multifunctional aminosilane-crosslinked reduced graphene oxide (AC-rGO) aerogels that are prepared via a facile and scalable strategy involving simultaneous crosslinking and reducing of graphene oxide nanosheets with different kinds of aminosilanes via C-N coupling and hydrolytic polycondensation reactions. It is found that 3-aminopropyl(diethoxy)methylsilane (APDEMS) is the better choice to enhance hydrophobicity, elasticity, and other properties of the resulting aerogels compared with (3-aminopropyl)triethoxysilane. One APDEMS molecule plays three roles as a crosslinker, a reductant, and a hydrophobizing agent. An outstanding combination of high surface area, ultralow density, superhydrophobicity, supercompressibility, superelasticity, low thermal conductivity, ultrahigh absorption capacity for organic liquids, efficient three-component separation, and strain/pressure sensing has been achieved in a single APDEMS-crosslinked rGO aerogel for the first time. In addition, a flexible, highly sensitive, and moisture-resistant AC-rGO aerogel-based strain/pressure-sensing array for the effective detection of strain (0-80%)/pressure (10 Pa to 10 kPa) distributions and object shapes has been demonstrated.

    DOI: 10.1021/acsami.9b16746

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  18. Thermogravimetric Evolved Gas Analysis and Microscopic Elemental Mapping of the Solid Electrolyte Interphase on Silicon Incorporated in Free-Standing Porous Carbon Electrodes Reviewed

    Hasegawa G., Kanamori K., Nakanishi K., Hayashi K.

    Langmuir   Vol. 35 ( 39 ) page: 12680 - 12688   2019.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Langmuir  

    Free-standing electrodes, which are free from additives (binders and conductive agents) and even current collectors, are useful in terms of both application research and fundamental study. Here, we demonstrate the preparation of binder-free monolithic carbon electrodes embracing Si nanoparticles in their well-defined porous scaffolds via the one-pot sol-gel reaction followed by carbonization. The free-standing electrodes with a thickness of 150 μm work out as a high-areal-density anode for Li-ion batteries, delivering up to ca. 7 mA h cm-2. As the Si content increases, the capacity decay on cycling becomes pronounced, which is likely to associate with the fracturing and pulverization of Si nanoparticles even with the size smaller than 100 nm after long-term cycles. The thermogravimetry-mass spectrometry profile of the cycled electrode corroborates the successive electrolyte decomposition to grow solid electrolyte interphase (SEI) mainly composed of lithium alkylcarbonates, polymeric species, and LiF, rendering the electrode mass nearly double of its original state after 200 cycles. The elemental mapping analysis reveals that LiF is generated inhomogeneously in the monolithic electrodes unlike the other SEI components, resulting in the concentration gradient depending on the distance from a Li counter electrode.

    DOI: 10.1021/acs.langmuir.9b02085

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  19. Superhydrophobic Ultraflexible Triple-Network Graphene/Polyorganosiloxane Aerogels for a High-Performance Multifunctional Temperature/Strain/Pressure Sensing Array Reviewed

    Zu G., Kanamori K., Nakanishi K., Huang J.

    Chemistry of Materials   Vol. 31 ( 16 ) page: 6276 - 6285   2019.8

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Chemistry of Materials  

    Recently, many efforts have been made to develop various smart sensors. However, achieving flexible multifunctional sensors combining excellent sensing of temperature, strain, and pressure with a single material is still challenging. Here, we report unprecedented superhydrophobic ultraflexible reduced graphene oxide (rGO)/polyorganosiloxane aerogels and high-performance multifunctional temperature/strain/pressure sensors based on these aerogels. GO nanosheets are first cross-linked and reduced with (3-aminopropyl)triethoxysilane (APTES) to obtain APTES-modified rGO aerogels, which are then further covalently cross-linked with polyvinylmethyldimethoxysilane polymers and vinylmethyldimethoxysilane via copolycondensation to afford rGO/polyorganosiloxane aerogels. The resulting aerogels exhibit a coralline-like triple-network nanostructure consisting of rGO nanosheets, polyvinyl-poly(methylsiloxane), and poly(vinylmethylsiloxane) that are cross-linked with each other. The aerogels combine superhydrophobicity, high compressibility, high bendability, superelasticity, excellent machinability, and temperature-, strain-, and pressure-sensitive conductivity, which is a combination not observed with traditional materials. In addition, an rGO/polyorganosiloxane aerogel-based flexible multifunctional sensing array combining sensing of temperature (20-100 °C), strain (in the wide range of 0.1-80%), and pressure (in the wide range of 10 Pa to 110 kPa) with high sensitivity and high durability against compression, bending, and humidity has been demonstrated for the first time.

    DOI: 10.1021/acs.chemmater.9b02437

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  20. Macroporous Niobium Phosphate-Supported Magnesia Catalysts for Isomerization of Glucose-to-Fructose Reviewed

    Gao D.M., Shen Y.B., Zhao B., Liu Q., Nakanishi K., Chen J., Kanamori K., Wu H., He Z., Zeng M., Liu H.

    ACS Sustainable Chemistry and Engineering   Vol. 7 ( 9 ) page: 8512 - 8521   2019.5

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    The catalytic performance of hierarchically porous niobium phosphate (NbP) supported magnesia for the glucose isomerization to fructose, was investigated under atmospheric air atmosphere. Porous NbP showed improved support effects on MgO in comparison to other metal oxides tested for glucose isomerization. Also, the amount and distribution of basic sites were largely changed by supporting magnesia on NbP. Although the textural properties were reduced and solid acids formed on the MgO/NbP catalysts, glucose isomerization was promoted by increasing magnesium content. The maximum yield of fructose reached ∼24.6% over 40%MgO/NbP-500 with selectivity of 65.7% for 1.0 wt % glucose at 120 °C. The fructose productivity peaked as high as 13.6 g g catalyst-1 h -1 over 40%MgO/NbP-700 catalyst. The leaching of cations and anions resulted in a homogeneous system for glucose isomerization. Regeneration almost fully reactivated the catalyst to its initial activity. The MgO/NbP showed high stability under air atmosphere for 15 days, and high potential use for glucose isomerization.

    DOI: 10.1021/acssuschemeng.9b00292

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  21. Preparation of surface-coated macroporous silica (core-shell silica monolith) for HPLC separations: Graphical Abstract Reviewed

    Ito Risako, Morisato Kei, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 90 ( 1 ) page: 105 - 112   2019.4

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    Abstract: Utilizing the spontaneous wetting of oligomeric silica-phase via phase-separation onto a solid surface in a confined dimension, sub-micrometer thick mesoporous layers have been coated on the surface of nonporous skeletons of preformed macroporous silica gels. The size and volume of mesopores within the layers could be controlled by subsequent aging conditions similarly to those reported for fully porous monolithic silica. Comparison of HPLC efficiencies of these novel type monolithic gels, core-shell silica monoliths, with those of a conventional silica monolith revealed that the retention factor per unit surface area became larger for core-shell silica monoliths. The increase in dynamic accessibility of analyte molecules to the mesopores well explain the improved retention factors in core-shell silica monoliths. [Figure not available: see fulltext.]

    DOI: 10.1007/s10971-018-4889-2

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  22. Hybrid silicone aerogels toward unusual flexibility, functionality, and extended applications Reviewed

    Kanamori Kazuyoshi, Ueoka Ryota, Kakegawa Takayuki, Shimizu Taiyo, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 89 ( 1 ) page: 166 - 175   2019.1

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    Abstract: Here, we overview the developments in the past decade made on organic–inorganic hybrid aerogels and xerogels based on silicone (polyorganosiloxanes) through persistent works by the authors to increase the mechanical strength and flexibility and add functionality. Polymethylsilsesquioxane (PMSQ, CH3SiO3/2) has been found to show unusual strength and flexibility against compression, and their bending properties can also be improved by several strategies. Silicone-based networks with organic bridges between inorganic moieties are also beneficial for these improvements. In particular, organic bridges with a higher fraction and more extended length have been found to allow higher durability against large deformations. In addition, functional groups such as vinyl, chloromethyl, and amino can readily be introduced by starting from organoalkoxysilanes with these functional substituents (e.g., FG−Si(OR)3 or (RO)3Si−FG−Si(OR)3, where FG shows an organic substituent containing functional groups and R is typically methyl or ethyl), and other functional groups such as carboxyl can be introduced by post-gelation modifications on the pre-installed FG in the network. Possibilities in applications such as thermal insulators, photoluminescent media, and photocatalysts are also discussed. [Figure not available: see fulltext.].

    DOI: 10.1007/s10971-018-4804-x

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  23. Synthesis of hierarchically porous MgO monoliths with continuous structure via sol-gel process accompanied by phase separation Reviewed

    Lu Xuanming, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 89 ( 1 ) page: 29 - 36   2019.1

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    Hierarchically porous magnesium oxide, MgO, monoliths with a well-defined continuous macroporous structure have been synthesized via the sol–gel route accompanied by phase separation. Magnesium chloride hexahydrate was used as a precursor, and propylene oxide was used as an acid scavenger to raise the pH of a reaction solution homogenously. In order to obtain a crack-free monolith after heating in air, poly(vinylpyrrolidone), PVP, was employed as a scaffold of the skeleton as well as a phase separation controller to form the continuous macropores with higher homogeneity. Due to the moderate hydrogen-bonding interaction with magnesium hydroxide, PVP reinforces the gel network essentially composed of fine grained magnesium hydroxide. Even after the removal of all organic components by calcination, the porous gel samples maintained their monolithic form. On the other hand, an additional incorporation of 1,3,5-benzenetricarboxylic acid, H3BTC, was found to be effective in suppressing the oriented growth of the micrometer-sized crystalline phase. The polycrystalline MgO monoliths with specific surface area of 185, 64, and 48 m2 g−1 were prepared after heating at 400, 500, and 600 °C in air, respectively. [Figure not available: see fulltext.].

    DOI: 10.1007/s10971-018-4682-2

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  24. Preparation of zinc oxide with a three-dimensionally interconnected macroporous structure via a sol-gel method accompanied by phase separation Reviewed

    Lu X., Kanamori K., Nakanishi K.

    New Journal of Chemistry   Vol. 43 ( 29 ) page: 11720 - 11726   2019

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    A facile method for the preparation of zinc oxide with three-dimensionally (3D) interconnected macropores has been developed. The Zn-based monolithic gel was obtained using citric acid (CA) as a structure supporter via an epoxide-mediated sol-gel method accompanied by phase separation. The size of the macropores could be controlled by the ratio of methanol to propylene oxide in the starting solution. The Zn-based gel was heat-treated in air with the purpose of removing the organic components and crystallizing the ZnO, finally resulting in pure ZnO (purity >90%, with negligible carbon content) with 3D interconnected macropores and an open nanoscale network. The influence of the starting solvent composition on the Zn-based gel morphologies has been examined and discussed based on the chemical compatibility of the Zn-CA complex with other components.

    DOI: 10.1039/c9nj02373a

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  25. Uric acid enhances alteplase-mediated thrombolysis as an antioxidant. Reviewed

    Kikuchi K, Setoyama K, Tanaka E, Otsuka S, Terashi T, Nakanishi K, Takada S, Sakakima H, Ampawong S, Kawahara KI, Nagasato T, Hosokawa K, Harada Y, Yamamoto M, Kamikokuryo C, Kiyama R, Morioka M, Ito T, Maruyama I, Tancharoen S

    Scientific reports   Vol. 8 ( 1 ) page: 15844   2018.10

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    DOI: 10.1038/s41598-018-34220-1

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  26. Sol-gel preparation of hierarchically porous magnesium aluminate (MgAl2O4) spinel monoliths for dye adsorption Reviewed

    Guo Xingzhong, Yin Pengan, Kanamori Kazuyoshi, Nakanishi Kazuki, Yang Hui

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 88 ( 1 ) page: 114 - 128   2018.10

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    Abstract: Hierarchically porous spinel-type binary metal oxide MgAl2O4 with cocontinuous skeletons and interconnected macropores has been synthesized by a facile sol–gel method accompanied by phase separation, in which poly (ethylene oxide) (PEO) works as phase separation inducer to form micrometer-scale phase-separated macrochannels at the same time of sol–gel transition. The obtained xerogels exhibit in the form of a monolith with well-defined macropores and cocontinuous dense skeletons by adjusting the amount of PEO. The xerogel and those heat-treated at or below 600 °C are amorphous, and heat-treatment at or above 700 °C allows the precipitation of complete crystalline MgAl2O4 spinel with a macropore size of 0.7–0.9 μm, a porosity of 60–70%, and a BET surface area of 40–80 m2 g−1, without spoiling the macrostructure of monoliths. Three anionic dyes and two cationic dyes are selected as targeted adsorbates to investigate the selective adsorption ability of a hierarchically porous MgAl2O4 spinel. The resultant MgAl2O4 spinel shows a high affinity and adsorption rate toward anionic dyes Congo Red, Methyl Orange, and Methyl Blue. The maximum adsorption capacity of MgAl2O4 spinel toward these three anionic dyes are 2721.6 mg g−1 for Congo Red, 2469.7 mg g−1 for Methyl Orange, and 6771.9 mg g−1 for Methyl Blue, respectively. [Figure not available: see fulltext.]

    DOI: 10.1007/s10971-018-4781-0

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  27. The gravitationally unstable gas disk of a starburst galaxy 12 billion years ago Reviewed

    Tadaki K., Iono D., Yun M.S., Aretxaga I., Hatsukade B., Hughes D.H., Ikarashi S., Izumi T., Kawabe R., Kohno K., Lee M., Matsuda Y., Nakanishi K., Saito T., Tamura Y., Ueda J., Umehata H., Wilson G.W., Michiyama T., Ando M., Kamieneski P.

    Nature   Vol. 560 ( 7720 ) page: 613 - 616   2018.8

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    Galaxies in the early Universe that are bright at submillimetre wavelengths (submillimetre-bright galaxies) are forming stars at a rate roughly 1,000 times higher than the Milky Way. A large fraction of the new stars form in the central kiloparsec of the galaxy1–3, a region that is comparable in size to the massive, quiescent galaxies found at the peak of cosmic star-formation history4 and the cores of present-day giant elliptical galaxies. The physical and kinematic properties inside these compact starburst cores are poorly understood because probing them at relevant spatial scales requires extremely high angular resolution. Here we report observations with a linear resolution of 550 parsecs of gas and dust in an unlensed, submillimetre-bright galaxy at a redshift of z = 4.3, when the Universe was less than two billion years old. We resolve the spatial and kinematic structure of the molecular gas inside the heavily dust-obscured core and show that the underlying gas disk is clumpy and rotationally supported (that is, its rotation velocity is larger than the velocity dispersion). Our analysis of the molecular gas mass per unit area suggests that the starburst disk is gravitationally unstable, which implies that the self-gravity of the gas is stronger than the differential rotation of the disk and the internal pressure due to stellar-radiation feedback. As a result of the gravitational instability in the disk, the molecular gas would be consumed by star formation on a timescale of 100 million years, which is comparable to gas depletion times in merging starburst galaxies5.

    DOI: 10.1038/s41586-018-0443-1

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  28. On-line Redox Derivatization Liquid Chromatography Using a Carbon Monolithic Column Reviewed

    Miyashita Ken, Tanaka Ryo, Hasegawa George, Nakanishi Kazuki, Morioka Kazuhiro, Zeng Hulie, Kato Shungo, Uchiyama Katsumi, Saitoh Kazunori, Shibukawa Masami, Nakajima Hizuru

    BUNSEKI KAGAKU   Vol. 67 ( 8 ) page: 469 - 478   2018.8

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  29. Superflexible Multifunctional Polyvinylpolydimethylsiloxane-Based Aerogels as Efficient Absorbents, Thermal Superinsulators, and Strain Sensors Reviewed

    Zu G., Kanamori K., Maeno A., Kaji H., Nakanishi K.

    Angewandte Chemie - International Edition   Vol. 57 ( 31 ) page: 9722 - 9727   2018.7

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    Aerogels are porous materials but show poor mechanical properties and limited functionality, which significantly restrict their practical applications. Preparation of highly bendable and processable aerogels with multifunctionality remains a challenge. Herein we report unprecedented superflexible aerogels based on polyvinylpolydimethylsiloxane (PVPDMS) networks, PVPDMS/polyvinylpolymethylsiloxane (PVPMS) copolymer networks, and PVPDMS/PVPMS/graphene nanocomposites by a facile radical polymerization/hydrolytic polycondensation strategy and ambient pressure drying or freeze drying. The aerogels have a doubly cross-linked organic–inorganic network structure consisting of flexible polydimethylsiloxanes and hydrocarbon chains with tunable cross-linking density, tunable pore size and bulk density. They have a high hydrophobicity and superflexibility and combine selective absorption, efficient separation of oil and water, thermal superinsulation, and strain sensing.

    DOI: 10.1002/anie.201804559

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  30. Comprehensive studies on phosphoric acid treatment of porous titania toward titanium phosphate and pyrophosphate monoliths with pore hierarchy and a nanostructured pore surface Reviewed

    Zhu Y., Hasegawa G., Kanamori K., Nakanishi K.

    Inorganic Chemistry Frontiers   Vol. 5 ( 6 ) page: 1397 - 1404   2018.6

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    Simple post-treatments of the porous titania monolith in varied concentrations of phosphoric acid solution provide a series of monolithic titanium phosphates (TiPs) with a hierarchically porous structure together with an exquisite macropore surface. Depending on the reaction conditions, platy crystallites composed of either Ti2O3(H2PO4)2·2H2O, Ti(HPO4)2·H2O (α-TiP), or Ti2O(PO4)2·2H2O (π-TiP) are generated on the macropore skeleton via a dissolution and reprecipitation process, which forms distinct wrinkled surface morphologies. In addition, the treatments effectively suppress the shrinkage during drying, leading to lower bulk density. Post-calcination in air yields porous titanium pyrophosphates preserving the intricate porous architecture in some cases. Notably, the hierarchically porous TiP2O7 monoliths prepared from the α-TiP precursors have a good thermal robustness related to bulk density.

    DOI: 10.1039/c8qi00146d

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  31. Versatile Double-Cross-Linking Approach to Transparent, Machinable, Supercompressible, Highly Bendable Aerogel Thermal Superinsulators Reviewed

    Zu G., Kanamori K., Shimizu T., Zhu Y., Maeno A., Kaji H., Nakanishi K., Shen J.

    Chemistry of Materials   Vol. 30 ( 8 ) page: 2759 - 2770   2018.4

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    A facile yet versatile approach to transparent, highly flexible, machinable, superinsulating organic-inorganic hybrid aerogels is presented. This method involves radical polymerization of a single alkenylalkoxysilane to obtain polyalkenylalkoxysilane, and subsequent hydrolytic polycondensation to afford a homogeneous, doubly cross-linked nanostructure consisting of polysiloxanes and hydrocarbon polymer units. Here we demonstrate that novel aerogels based on polyvinylpolysilsesquioxane (PVPSQ), polyallylpolysilsesquioxane (PAPSQ), polyvinylpolymethylsiloxane (PVPMS), and polyallylpolymethylsiloxane (PAPMS) are facilely prepared via this approach from vinyltrimethoxysilane (VTMS; or vinyltriethoxysilane, VTES), allyltrimethoxysilane (ATMS; or allyltriethoxysilane, ATES), vinylmethyldimethoxysilane (VMDMS), and allylmethyldimethoxysilane (AMDMS), respectively. These aerogels combine low density, uniform nanopores, high transparency, supercompressibility, high bendability, excellent machinability, and thermal superinsulation (λ = 14.5-16.4 mW m-1 K-1). More importantly, transparent, superflexible, superinsulating aerogels are obtained with PVPMS and PAPMS via highly scalable ambient pressure drying without any solvent-exchange and modifications for the first time. This work will open a new way to transparent, highly flexible porous materials, promising in the practical applications of thermal superinsulators, adsorbents, sensors, etc.

    DOI: 10.1021/acs.chemmater.8b00563

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  32. Transparent, Superflexible Doubly Cross-Linked Polyvinylpolymethylsiloxane Aerogel Superinsulators via Ambient Pressure Drying Reviewed

    Zu G., Shimizu T., Kanamori K., Zhu Y., Maeno A., Kaji H., Shen J., Nakanishi K.

    ACS Nano   Vol. 12 ( 1 ) page: 521 - 532   2018.1

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    Aerogels have many attractive properties but are usually costly and mechanically brittle, which always limit their practical applications. While many efforts have been made to reinforce the aerogels, most of the reinforcement efforts sacrifice the transparency or superinsulating properties. Here we report superflexible polyvinylpolymethylsiloxane, (CH2CH(Si(CH3)O2/2))n, aerogels that are facilely prepared from a single precursor vinylmethyldimethoxysilane or vinylmethyldiethoxysilane without organic cross-linkers. The method is based on consecutive processes involving radical polymerization and hydrolytic polycondensation, followed by ultralow-cost, highly scalable, ambient-pressure drying directly from alcohol as a drying medium without any modification or additional solvent exchange. The resulting aerogels and xerogels show a homogeneous, tunable, highly porous, doubly cross-linked nanostructure with the elastic polymethylsiloxane network cross-linked with flexible hydrocarbon chains. An outstanding combination of ultralow cost, high scalability, uniform pore size, high surface area, high transparency, high hydrophobicity, excellent machinability, superflexibility in compression, superflexibility in bending, and superinsulating properties has been achieved in a single aerogel or xerogel. This study represents a significant progress of porous materials and makes the practical applications of transparent flexible aerogel-based superinsulators realistic.

    DOI: 10.1021/acsnano.7b07117

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  33. Iron(iii) oxyhydroxide and oxide monoliths with controlled multiscale porosity: Synthesis and their adsorption performance Reviewed

    Hara Y., Kanamori K., Morisato K., Miyamoto R., Nakanishi K.

    Journal of Materials Chemistry A   Vol. 6 ( 19 ) page: 9041 - 9048   2018

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    Iron(iii) oxyhydroxide and oxide monoliths with controlled multiscale porosity have been successfully fabricated via the sol-gel process accompanied by phase separation. The size of macropores was controlled by synthesis parameters such as starting compositions. The as-dried iron(iii) oxyhydroxide monoliths were amorphous and possessed surface areas over 340 m2 g-1, of which mesostructures could be further controlled by a heat-treatment at 250-350 °C without collapse of macrostructures and monolithic forms. When the as-dried gel was heated at 300 °C, the resultant gel transformed to crystalline α-Fe2O3 and exhibited a specific surface area of 124 m2 g-1. Heat-treatment at 350 °C resulted in the broadened size distribution of mesopores. The adsorption behavior of Congo red has revealed that the interconnected macroporous structure contributed to faster diffusion and better accessibility in a continuous flow-through set up, and the crack-free monolithic forms accounted for an advantageous use of the flow-through adsorbents.

    DOI: 10.1039/c8ta01691g

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  34. On-line redox derivatization liquid chromatography using a carbon monolithic column Reviewed

    Miyashita K., Tanaka R., Hasegawa G., Nakanishi K., Morioka K., Zeng H., Kato S., Uchiyama K., Saitoh K., Shibukawa M., Nakajima H.

    Bunseki Kagaku   Vol. 67 ( 8 ) page: 469 - 478   2018

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    A macroporous resorcinol-formaldehyde (RF) xerogel was synthesized via sol–gel reaction, accompanied by phase separation; a graphitized carbon monolith was then prepared by calcining the RF xerogel at a relatively low temperature (1200 °C) utilizing catalytic graphitization. The retention behaviors of metal-EDTA complexes on the carbon monolithic column were investigated. The carbon monolith exhibited catalytic activity for redox reactions, like porous graphitic carbon packing materials do; they oxidized Co(II)-EDTA to Co(III)-EDTA during elution. Their redox activity could be modified by treating with an eluent containing an oxidizing or reducing agent. A novel on-line redox derivatization HPLC system using a carbon monolithic column was developed for enhancing the separation selectivity. This on-line redox derivatization HPLC system consisted of two ODS columns as a separation column and one carbon monolithic column as redox derivatization unit placed between them. The Co(II)-EDTA migrated as its original oxidation state in the first ODS column, while it migrated as Co(III)-EDTA in the second ODS column, since Co(II)-EDTA was rapidly oxidized to Co(III)-EDTA in the carbon monolithic column. On the other hand, other metal-EDTA complexes migrated as their original oxidation states in these columns. Therefore, the Co-EDTA could be separated from the other metal-EDTA complexes. This on-line redox derivatization HPLC system was successfully used for determining the trace amount of cobalt in a reference copper alloy.

    DOI: 10.2116/bunsekikagaku.67.469

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  35. Synthesis of a hierarchically porous niobium phosphate monolith by a sol-gel method for fructose dehydration to 5-hydroxymethylfurfural Reviewed

    Gao D.M., Zhao B., Liu H., Morisato K., Kanamori K., He Z., Zeng M., Wu H., Chen J., Nakanishi K.

    Catalysis Science and Technology   Vol. 8 ( 14 ) page: 3675 - 3685   2018

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    Hierarchically porous niobium phosphate (NbP) was synthesised via a sol-gel method accompanied by phase separation and employed as a catalyst for fructose dehydration. The niobium precursor was prepared by digesting ammonium niobate(v) oxalate in aqueous H2O2 with citric acid as a chelating agent to prevent the precipitation of niobium hydroxide. Poly(acrylamide) and poly(ethylene glycol) were used as phase separation inducers to produce co-continuous macropores and gel skeletons. The NbP sample calcined at 600 °C for 8 h had a high surface area (SBET ∼140 m2 g-1) and large acidity (0.84 mmol-NH3 g-1). The NbP monolith was amorphous after calcination at 600 °C and transformed into an α-NbOPO4 phase at 1000 °C. The NbP monolith calcined at 600 °C was an efficient acid catalyst for the dehydration of fructose to 5-hydroxymethylfurfural in water (70% yield) or in aqueous dimethyl sulfoxide (90% yield). The productivity of HMF reached 7.3 × 10-2 mol h-1 per kg-solution at an initial fructose concentration of 10.0 wt% in water with a catalyst loading of 2.0 wt%.

    DOI: 10.1039/c8cy00803e

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  36. The effect of exercise frequency on neuropathic pain and pain-related cellular reactions in the spinal cord and midbrain in a rat sciatic nerve injury model. Reviewed

    Sumizono M, Sakakima H, Otsuka S, Terashi T, Nakanishi K, Ueda K, Takada S, Kikuchi K

    Journal of pain research   Vol. 11   page: 281 - 291   2018

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    DOI: 10.2147/JPR.S156326

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  37. Synthesis and characterization of monolithic ZnAl2O4 spinel with well-defined hierarchical pore structures via a sol-gel route Reviewed

    Guo Xingzhong, Yin Pengan, Lei Wei, Yang Hui, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF ALLOYS AND COMPOUNDS   Vol. 727   page: 763 - 770   2017.12

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    Hierarchically porous ZnAl2O4 spinel monolith derived from ionic precursors has been successfully prepared via the sol-gel route accompanied by phase separation in the presence of poly (ethylene oxide) (PEO) and propylene oxide (PO). Appropriate amounts of PEO as a phase-separation inducer and PO as a gelation mediator allow the formation of the xerogel with bicontinuous macrostructure and a monolithic shape. The macropore size of the resultant dried gel is mainly distributed in the range of 0.2–1 μm, and the whole porosity is about 65%. The dried gel is constructed by crystalline Zn–Al hydrotalcite, becoming amorphous after heat-treated at 300–500 °C in air, and is further transformed into single phase ZnAl2O4 spinel with plate-like shape at 600 °C. The macroporous structure is well maintained while the porosity increases to 75% and the surface area rises to 109 m2 g−1 after heat-treatment.

    DOI: 10.1016/j.jallcom.2017.08.172

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  38. Aerogels from Chloromethyltrimethoxysilane and Their Functionalizations. Reviewed

    Kimura T, Shimizu T, Kanamori K, Maeno A, Kaji H, Nakanishi K

    Langmuir : the ACS journal of surfaces and colloids   Vol. 33 ( 48 ) page: 13841 - 13848   2017.12

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    DOI: 10.1021/acs.langmuir.7b03013

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  39. Polymer-assisted shapeable synthesis of porous frameworks consisting of silica nanoparticles with mechanical property tuning Reviewed

    Sato K., Ishii K., Oaki Y., Nakanishi K., Imai H.

    Polymer Journal   Vol. 49 ( 12 ) page: 825 - 830   2017.12

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    We report the shapeable synthesis of porous silica frameworks using polyacrylamide (PAAm) gel as an organic template and hydrolyzed silicon alkoxide as a silica source. Macroscopically shaped porous frameworks - such as plates, tablets and sheets - comprised of 20- to 40-nm diameter silica particles are obtained via PAAm-silica precursor gels. The mechanical properties (i.e., hardness and Young's modulus) of the silica frameworks depend on the packing density and are controlled by changing the silica content in PAAm gels.

    DOI: 10.1038/pj.2017.62

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  40. Synthesis, Reduction, and Electrical Properties of Macroporous Monolithic Mayenite Electrides with High Porosity Reviewed

    Wang R., Yang H., Lu Y., Kanamori K., Nakanishi K., Guo X.

    ACS Omega   Vol. 2 ( 11 ) page: 8148 - 8155   2017.11

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    Room-temperature stable macroporous mayenite electride (C12A7:e-) has been successfully prepared via a sol-gel method accompanied by phase separation, followed by heat-treatment and reduction processes. The obtained xerogel monoliths possess controllable macrostructure and a porosity of more than 60%, depending on adjusting the amount of poly(ethylene oxide) as a phase separation inducer. Heat-treatment allows the formation of multicrystals Ca12Al14O32Cl2 and Ca12Al14O33 (C12A7), and the porosity increases to 78.67% after being heat-treated at 1100 °C. Further reduction promotes the transformation from Ca12Al14O32Cl2 or C12A7 to C12A7:e- as well as the conversion from an insulator to a semiconductive electride. The carrier concentration of the electride reaches 3.029 × 1018 cm-3 after being reduced at 1100 °C under Ar atmosphere, and the porosity still remains 66%. The macrostructure of the resultant mayenite electride before and after heat-treatment and reduction is perfectly preserved, indicating that the obtained macroporous monolithic mayenite electride could be utilized in the electronic components.

    DOI: 10.1021/acsomega.7b01121

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  41. Very Compact Millimeter Sizes for Composite Star-forming/AGN Submillimeter Galaxies Reviewed

    Ikarashi S., Caputi K.I., Ohta K., Ivison R.J., Lagos C.D.P., Bisigello L., Hatsukade B., Aretxaga I., Dunlop J.S., Hughes D.H., Iono D., Izumi T., Kashikawa N., Koyama Y., Kawabe R., Kohno K., Motohara K., Nakanishi K., Tamura Y., Umehata H., Wilson G.W., Yabe K., Yun M.S.

    Astrophysical Journal Letters   Vol. 849 ( 2 )   2017.11

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    We report the study of the far-infrared (IR) sizes of submillimeter galaxies (SMGs) in relation to their dustobscured star formation rate (SFR) and active galactic nuclei (AGN) presence, determined using mid-IR photometry. We determined the millimeter-wave (λobs = 1100 μm) sizes of 69 Atacama Large Millimeter/ submillimeter Array (ALMA)-identified SMGs, selected with ≥10 δ confidence on ALMA images (F1100 μm = 1.7-7.4 mJy). We found that all of the SMGs are located above an avoidance region in the sizeflux plane, as expected by the Eddington limit for star formation. In order to understand what drives the different millimeter-wave sizes in SMGs, we investigated the relation between millimeter-wave size and AGN fraction for 25 of our SMGs at z=1-3. We found that the SMGs for which the mid-IR emission is dominated by star formation or AGN have extended millimeter-sizes, with respective median Rc,e = 1.6-0.21+0.34 and 1.5 -0.24+0.93 kpc. Instead, the SMGs for which the mid-IR emission corresponds to star-forming/AGN composites have more compact millimeter-wave sizes, with median Rc,e1.0 -0.20+0.20kpc. The relation between millimeter-wave size and AGN fraction suggests that this size may be related to the evolutionary stage of the SMG. The very compact sizes for composite star-forming/AGN systems could be explained by supermassive black holes growing rapidly during the SMG coalescing, star-formation phase.

    DOI: 10.3847/2041-8213/aa9572

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  42. Fabrication of hydrophobic polymethylsilsesquioxane aerogels by a surfactant-free method using alkoxysilane with ionic group Reviewed

    Hayase G., Nagayama S., Nonomura K., Kanamori K., Maeno A., Kaji H., Nakanishi K.

    Journal of Asian Ceramic Societies   Vol. 5 ( 2 ) page: 104 - 108   2017.6

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    Phase separation control is an important factor to prepare a porous monolith by an aqueous sol–gel reaction. Here, we report a surfactant-free synthesis method to obtain hydrophobic polymethylsilsesquioxane aerogels by copolymerizing a cationic-functionalized alkoxysilane N-trimethoxysilylpropyl-N,N,N-trimethylammonium chloride. The resultant materials have low-density, high visible-light transmittance, and high thermal insulating equivalent to those of prepared under the presence of surfactant.

    DOI: 10.1016/j.jascer.2017.02.003

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  43. Transparent Ethenylene-Bridged Polymethylsiloxane Aerogels: Mechanical Flexibility and Strength and Availability for Addition Reaction Reviewed

    Shimizu T., Kanamori K., Maeno A., Kaji H., Doherty C.M., Nakanishi K.

    Langmuir   Vol. 33 ( 18 ) page: 4543 - 4550   2017.5

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    Transparent, low-density ethenylene-bridged polymethylsiloxane [Ethe-BPMS, O2/2(CH3)Si-CHCH-Si(CH3)O2/2] aerogels from 1,2-bis(methyldiethoxysilyl)ethene have successfully been synthesized via a sol-gel process. A two-step sol-gel process composed of hydrolysis under acidic conditions and polycondensation under basic conditions in a liquid surfactant produces a homogeneous pore structure based on cross-linked nanosized colloidal particles. Visible-light transmittance of the aerogels varies with the concentration of the base catalyst and reaches as high as 87% (at a wavelength of 550 nm for a 10 mm thick sample). Gelation and aging temperature strongly affect the deformation behavior of the resultant aerogels against uniaxial compression, and the obtained aerogels prepared at 80 °C show high elasticity after being unloaded. This highly resilient behavior is primarily derived from the rigidity of ethenylene groups, which is confirmed by a comparison with other aerogels with similar molecular structures, ethylene-bridged polymethylsiloxane and polymethylsilsesquioxane. Applicability of the addition reaction using a Diels-Alder reaction of benzocyclobutene has also been investigated, revealing that a successful addition takes place on the ethenylene linkings, which is verified using Raman and solid-state NMR spectroscopies. Insights into the effect of molecular structure on mechanical properties and the availability of surface functionalization provided in this study are important for realizing transparent aerogels with the desired functionality.

    DOI: 10.1021/acs.langmuir.7b00434

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  44. Silicone-Based Organic–Inorganic Hybrid Aerogels and Xerogels Reviewed

    Shimizu T., Kanamori K., Nakanishi K.

    Chemistry - A European Journal   Vol. 23 ( 22 ) page: 5176 - 5187   2017.4

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    Aerogels are attracting increasing attention due to their high thermal insulation ability as well as unique properties such as high porosity, surface area, and transparency. However, low mechanical strengths, originating from their unique porous structure, impede handling, formability, mass production, and extended applications. This minireview focuses on the strengthening of aerogels by several organic–inorganic hybridization strategies. In particular, successful strengthening methodologies, which employ organo-substituted alkoxysilanes as the single precursor for the sol–gel preparations, developed by the authors are highlighted. Moreover, improvements in compressive strength and elasticity lead to monolithic aerogel-like xerogels through ambient pressure drying. Correlations between structures in different length scales (e.g., molecular, network, and pore structure levels) and resultant mechanical properties are discussed for further understandings and better design toward mechanically improved aerogels/xerogels and their applications.

    DOI: 10.1002/chem.201603680

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  45. Transparent polyvinylsilsesquioxane aerogels: investigations on synthetic parameters and surface modification Reviewed

    Shimizu T., Kanamori K., Nakanishi K.

    Journal of Sol-Gel Science and Technology   Vol. 82 ( 1 ) page: 2 - 14   2017.4

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    Abstract: Systematic investigations on the effect of synthetic conditions onto the properties of polyvinylsilsesquioxane (CH2=CHSiO3/2) aerogels have been conducted. As previously reported, transparent polyvinylsilsesquioxane aerogels can be obtained by utilizing a liquid surfactant as a solvent and a two-step sol–gel reaction involving hydrolysis catalyzed by a strong acid and subsequent polycondensation by a strong base. In this study, effects of base catalyst, gelation and aging conditions, amount of surfactant and concentration of acid catalyst have been investigated. With the optimized synthetic condition, the value of light transmittance reaches as high as 70% (at the wavelength of 550 nm for a 10-mm thick sample). Applicability of addition reactions utilizing thiol-ene reactions and hydrosilylation has also been surveyed. Thiol-ene reactions are relatively effective and can modify surface hydrophobicity and mechanical properties of polyvinylsilsesquioxane aerogels. In the case of hydrosilylation, a partial addition of a hydrosilane compound onto the polyvinylsilsesquioxane gel surface can be observed. Addition reactions, in particular thiol-ene reactions, are found to be profitable for implementing chemical functionality on the transparent aerogels. Graphical Abstract: [InlineMediaObject not available: see fulltext.]

    DOI: 10.1007/s10971-017-4339-6

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  46. Highly Flexible Hybrid Polymer Aerogels and Xerogels Based on Resorcinol-Formaldehyde with Enhanced Elastic Stiffness and Recoverability: Insights into the Origin of Their Mechanical Properties Reviewed

    Hasegawa G., Shimizu T., Kanamori K., Maeno A., Kaji H., Nakanishi K.

    Chemistry of Materials   Vol. 29 ( 5 ) page: 2122 - 2134   2017.3

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    Flexible low-density materials, such as aerogels and polymer foams, have received increasing attention as energy absorbers and cushions that protect artificial products and human bodies. Microscopic geometry is a crucial factor determining their mechanical functions, i.e. strength and toughness (flexibility). However, it is a formidable challenge to combine these two properties because they are mutually elusive in general; stiff materials are brittle, while flexible ones are soft. Here, we demonstrate lightweight porous polymeric materials based on a common phenolic resin, resorcinol-formaldehyde (RF) gels, with salient combinatorial properties of high stiffness (up to 100 MPa) and good recoverable compressibility (against 80-90% strain), which can deliver remarkable energy absorption and dissipation performances repetitively. The detailed investigation reveals that the unique mechanical features originate from the synergetic effect of interdigitated hard and soft components in polymer matrices as well as exquisitely designed highly branched microstructures both generated through the spontaneous supramolecular self-assembly of the nonionic block copolymer (F127) and RF oligomer, which is essentially analogous to how natural organisms create biological structural materials, e.g. nacre and bone.

    DOI: 10.1021/acs.chemmater.6b04706

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  47. Highly efficient encapsulation of ingredients in poly(methyl methacrylate) capsules using a superoleophobic material Reviewed

    Takei T., Araki K., Terazono K., Ozuno Y., Hayase G., Kanamori K., Nakanishi K., Yoshida M.

    Polymers and Polymer Composites   Vol. 25 ( 2 ) page: 129 - 134   2017.2

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    Increasing the efficiency of encapsulation of ingredients into spherical capsules can decrease the manufacturing costs of the capsules. Ingredients can be encapsulated with high efficiency (>99%) into nondegradable hard resin capsules prepared by polymerization of spherical droplets of trimethylolpropane trimethacrylate (TRIM) monomer placed on a superoleophobic material. Poly(methyl methacrylate) (PMMA) resin is a more versatile capsule material than poly-TRIM resin. In this study, the efficiency of encapsulation in PMMA resin capsules prepared from methyl methacrylate (MMA) monomer was investigated. To reduce the volatility of the MMA monomer, pre-polymerized MMA was used for capsule preparation. Although non-volatile α-tocopherol and doxorubicin could be encapsulated in the capsules with high efficiency by heat polymerization at 60°C for 3 h, the efficiency for volatile tetradecane was much lower (approximately 60%) because it evaporated. Furthermore, even when using pre-polymerized MMA, more than 70% of the prepolymer evaporated during polymerization. To prevent the evaporation of tetradecane and the prepolymer, ultraviolet photopolymerization was adopted because it was faster and could be conducted at a lower temperature. The photopolymerization prevented the evaporation of the prepolymer and increased the efficiency of encapsulation of tetradecane (approximately 90% efficiency). This polymerization system is effective for encapsulation of ingredients in PMMA capsules with high efficiency.

    DOI: 10.1177/096739111702500202

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  48. Amine/Hydrido Bifunctional Nanoporous Silica with Small Metal Nanoparticles Made Onsite: Efficient Dehydrogenation Catalyst. Reviewed

    Zhu Y, Nakanishi T, Kanamori K, Nakanishi K, Ichii S, Iwaida K, Masui Y, Kamei T, Shimada T, Kumamoto A, Ikuhara YH, Jeon M, Hasegawa G, Tafu M, Yoon CW, Asefa T

    ACS applied materials & interfaces   Vol. 9 ( 1 ) page: 36 - 41   2017.1

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    DOI: 10.1021/acsami.6b12972

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  49. Grafted polymethylhydrosiloxane on hierarchically porous silica monoliths: A new path to monolith-supported palladium nanoparticles for continuous flow catalysis applications Reviewed

    Pélisson C.H., Nakanishi T., Zhu Y., Morisato K., Kamei T., Maeno A., Kaji H., Muroyama S., Tafu M., Kanamori K., Shimada T., Nakanishi K.

    ACS Applied Materials and Interfaces   Vol. 9 ( 1 ) page: 406 - 412   2017.1

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    Polymethylhydrosiloxane has been grafted on the surface of a hierarchically porous silica monolith using a facile catalytic reaction between Si-H and silanol to anchor the polymer. This easy methodology leads to the functionalization of the surface of a silica monolith, where a large amount of free Si-H bonds remain available for reducing metal ions in solution. Palladium nanoparticles of 15 nm have been synthesized homogeneously inside the mesopores of the monolith without any stabilizers, using a flow of a solution containing Pd2+. This monolith was used as column-type fixed bed catalyst for continuous flow hydrogenation of styrene and selective hydrogenation of 3-hexyn-1-ol, in each case without a significant decrease of the catalytic activity after several hours or days. Conversion, selectivity, and stereoselectivity of the alkyne hydrogenation can be tuned by flow rates of hydrogen and the substrate solution, leading to high productivity (1.57 mol g(Pd)-1 h-1) of the corresponding cis-alkene.

    DOI: 10.1021/acsami.6b12653

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  50. Low-density, transparent aerogels and xerogels based on hexylene-bridged polysilsesquioxane with bendability Reviewed

    Aoki Y., Shimizu T., Kanamori K., Maeno A., Kaji H., Nakanishi K.

    Journal of Sol-Gel Science and Technology   Vol. 81 ( 1 ) page: 42 - 51   2017.1

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    Abstract: Low-density, transparent aerogels based on a hexylene-bridged polysilsesquioxane ([O1.5Si–(CH2)6–SiO1.5]n) network have been prepared for the first time via a simple sol–gel process. An optimized base-catalyzed one-step hydrolysis–polycondensation process of a bridged alkoxysilane precursor 1,6-bis(trimethoxysilyl)hexane in a low-polarity solvent N,N-dimethylformamide allows for the formation of a pore structure of a length scale of several tens nanometers, resulting in low-density, transparent aerogels after supercritical drying. Because of the incorporated organic moiety that bridges the silicon atoms in the network, these aerogels show higher flexibility and strength against compression and bending as compared to silica aerogel counterparts. In addition, minimizing the residual silanol groups in the network by a surface modification with hexamethyldisilazane has further improved resilience after compression and bending flexibility and strength, due to the decreased chance of the irreversible formation of the siloxane bonds upon compression. The resulting trimethylsilylated hydrophobic gels have been subjected to ambient pressure drying to obtain xerogels, resulting in low-density (0.13 g cm−3, 90 % porosity), transparent (71 % transmittance) xerogels. These results are promising for the development of transparent thermal superinsulators applicable to window insulating systems that manage heat transfer in a more efficient way. Graphical Abstract: [Figure not available: see fulltext.]

    DOI: 10.1007/s10971-016-4077-1

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  51. Effects of nanostructured biosilica on rice plant mechanics Reviewed

    Sato Kanako, Ozaki Noriaki, Nakanishi Kazuki, Sugahara Yoshiyuki, Oaki Yuya, Salinas Christopher, Herrera Steven, Kisailus David, Imai Hiroaki

    RSC ADVANCES   Vol. 7 ( 22 ) page: 13065 - 13071   2017

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    Nanostructured amorphous silica in rice plants (biosilica or plant opal) plays an important role in plant growth related to food production. However, the same silica has a structural supporting role as well that has not been uncovered. The current study focuses on the structural design of the two main types of biosilicas in rice plants for the improvement of their mechanical properties. One structural motif is plate-like silicas, which cover most of the surfaces of leaf blades. Another is fan-shaped silicas, which are aligned inside leaf blades, providing a stiff backbone. These biosilica structures consist of 10-100 nm diameter nanoparticles. The mechanical properties, such as hardness and Young's modulus, of the biosilicas are associated with their relative density. Thus, the rice plant mechanics is inferred to be designed by changing the packing of the nanoparticles. Silica plates consisting of loosely packed particles have relatively low density and high flexibility enabling coverage of leaf blade surfaces, while fan-shaped silicas, which consist of tightly packed nanoparticles, are rigid to support the leaf blades as a backbone.

    DOI: 10.1039/c6ra27317c

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  52. Functionalization of hierarchically porous silica monoliths with polyethyleneimine (PEI) for CO<inf>2</inf> adsorption Reviewed

    Guo X., Ding L., Kanamori K., Nakanishi K., Yang H.

    Microporous and Mesoporous Materials   Vol. 245   page: 51 - 57   2017

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    A novel CO2 sorbent was prepared by modifying polyethyleneimine (PEI) on hierarchically porous silica (HPS) monoliths with well-defined macro-mesopores through wet impregnation method. HPS monoliths before and after functionalization were characterized by scanning electron microscopy (SEM), differential thermal analysis/thermogravimetry (DTA/TG), fourier transform infrared spectroscopy (FT-IR) and nitrogen adsorption/desorption analysis (BET), and the CO2 adsorption-regeneration properties of as-synthesized sorbents were investigated by thermogravimetric analysis (TG). The effects of loaded PEI amount as well as adsorption temperature and CO2 partial pressure on the CO2 adsorption performance of the as-prepared sorbents were also studied. The results showed that the porous structure of HPS-PEI sorbents was preserved after functionalization, while the specific surface area and pore volume decreased with increasing amount of amines to some extent. The use of PEI had a remarkable improvement on the CO2 adsorption capacity. With the increasing amount of PEI loaded, the CO2 adsorption capacity improved significantly. The highest CO2 adsorption capacity of 2.44 mmol (g sorbent)−1 was obtained at 75 °C in the CO2 partial pressure of 100 kPa for the HPS loaded with 60 wt% PEI. Adsorption/desorption cycles indicated that the PEI-modified HPS sorbents had a good stability and regeneration.

    DOI: 10.1016/j.micromeso.2017.02.076

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  53. Nanostructured titanium phosphates prepared via hydrothermal reaction and their electrochemical Li- and Na-ion intercalation properties Reviewed

    Zhu Y., Hasegawa G., Kanamori K., Kiyomura T., Kurata H., Hayashi K., Nakanishi K.

    CrystEngComm   Vol. 19 ( 31 ) page: 4551 - 4560   2017

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    In this report, we demonstrate a facile and versatile methodology for synthesizing a series of titanium phosphates (TiPs) with various morphologies. The hydrothermal reactions of TiO2 in different concentrations of H3PO4 aq. yield 4 types of crystal structures with diverse shapes, such as nanoparticles, nanorods and nanosheets, which are assembled into a variety of flower-like morphologies. The dependence of the crystal phases and morphologies of TiPs on the synthesis conditions have been comprehensively investigated. This synthetic process can be further extended to other TiP derivatives incorporated with guest cations (e.g. NH4+ and Na+) simply by adding the corresponding phosphate salts to the starting composition, which leads to the morphological variation associated with the change of the crystal phase. The mechanism for the formation of the TiPs is discussed in terms of the stable Ti-based ion species relying on the pH value of the reaction solution. In addition, the correlation between the crystal structures and morphologies of TiPs and their electrochemical Li- and Na-ion storage behaviors are demonstrated as well, which discloses the different tendencies of morphological effects between the Li- and Na-ion systems.

    DOI: 10.1039/c7ce01123g

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  54. Transparent Ethylene-Bridged Polymethylsiloxane Aerogels and Xerogels with Improved Bending Flexibility Reviewed

    Shimizu T., Kanamori K., Maeno A., Kaji H., Nakanishi K.

    Langmuir   Vol. 32 ( 50 ) page: 13427 - 13434   2016.12

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    Transparent, monolithic aerogels with nanosized colloidal skeletons have been obtained from a single precursor of 1,2-bis(methyldiethoxysilyl)ethane (BMDEE) by adopting a liquid surfactant and a two-step process involving strong-acid, followed by strong-base, sol-gel reactions. This precursor BMDEE forms the ethylene-bridged polymethylsiloxane (EBPMS, O2/2(CH3)Si-CH2CH2-Si(CH3)O2/2) network, in which each silicon has one methyl, two bridging oxygens, and one bridging ethylene, exhibiting an analogous structure to that of the previously reported polymethylsilsesquioxane (PMSQ, CH3SiO3/2) aerogels having one methyl and three bridging oxygen atoms. Obtained aerogels consist of fine colloidal skeletons and show high visible-light transparency and a flexible deformation behavior against compression without collapse. Similar to the PMSQ aerogels, a careful tuning of synthetic conditions can produce low-density (0.19 g cm-3) and highly transparent (76% at 550 nm, corresponding to 10 mm thick samples) xerogels via ambient pressure drying by solvent evaporation due to their high strength and resilience against compression. Moreover, EBPMS aerogels exhibit higher bending strength and bending strain at break against the three-point bending mode compared to PMSQ aerogels. This improved bendability is presumably derived from the introduced ethylene-bridging parts, suggesting the potential for realizing transparent and bendable aerogels in such polysiloxane materials with organic linking units.

    DOI: 10.1021/acs.langmuir.6b03249

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  55. Monolithic acidic catalysts for the dehydration of xylose into furfural Reviewed

    Zhu Y., Kanamori K., Brun N., Pélisson C., Moitra N., Fajula F., Hulea V., Galarneau A., Takeda K., Nakanishi K.

    Catalysis Communications   Vol. 87   page: 112 - 115   2016.12

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    We report the application of hierarchically porous zirconium phosphate monoliths with high surface area as acidic heterogeneous catalysts for the dehydration of xylose into furfural. Analyses by NH3-temperature programmed desorption and 31P solid state NMR reveal the presence of both Lewis and Brønsted acid sites in the as-synthesized zirconium phosphate monolith and that calcined at 600 °C. High accessibility and availability of the acidic sites and easy separation of the monolith from the liquid medium result in good catalytic activity (initial reaction rate for furfural production as 8.7 mmol gcat− 1 h− 1) with easy handling of the catalyst.

    DOI: 10.1016/j.catcom.2016.09.014

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  56. Transparent, Highly Insulating Polyethyl- and Polyvinylsilsesquioxane Aerogels: Mechanical Improvements by Vulcanization for Ambient Pressure Drying Reviewed

    Shimizu T., Kanamori K., Maeno A., Kaji H., Doherty C., Falcaro P., Nakanishi K.

    Chemistry of Materials   Vol. 28 ( 19 ) page: 6860 - 6868   2016.10

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    Silica aerogels are unique porous materials possessing high visible-light transparency and low thermal conductivity. However, the practical applications are limited due to the native fragility of silica, and a lot of research focuses on the improvement of mechanical properties by organic-inorganic hybridization, and so forth. Here, the first synthesis of polyethylsilsesquioxane (PESQ; CH3CH2SiO1.5) and polyvinylsilsesquioxane (PVSQ; CH2 - CHSiO1.5) aerogels is reported. The resultant PESQ and PVSQ aerogels obtained through a two-step acid-base sol-gel reaction in a surfactant-based solution exhibit visible-light transmittance and flexibility against compression without collapsing. The microstructural variations of these aerogels are systematically investigated by positron annihilation lifetime spectroscopy (PALS) in order to clarify the differences in properties derived from substituent groups. Furthermore, a post cure on the PVSQ wet gel using a radical initiator induces polymerization of vinyl groups in the solid network, resulting in mechanically reinforced aerogels with higher compressive modulus and resilience. This chemical modification, similar to vulcanization in silicone rubber materials, helps to produce xerogels with comparable properties to those of aerogels via ambient pressure drying. Since the resultant xerogel obtained from the vulcanization of PVSQ shows sufficiently low thermal conductivity of 15.3 mW m-1 K-1, these novel polysilsesquioxane materials are promising for transparent aerogels/xerogels superinsulators.

    DOI: 10.1021/acs.chemmater.6b01936

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  57. The XVIII International Sol-Gel Conference: Sol-Gel 2015 was held in Kyoto, Japan, September 6-11, 2015 Reviewed

    Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 79 ( 2 ) page: 241 - 241   2016.8

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    DOI: 10.1007/s10971-016-4124-y

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  58. Facile preparation of well-defined macroporous yttria-stabilized zirconia monoliths via sol-gel process accompanied by phase separation Reviewed

    Guo Xingzhong, Song Jie, Ren Jing, Yang Fanger, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF POROUS MATERIALS   Vol. 23 ( 4 ) page: 867 - 875   2016.8

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    DOI: 10.1007/s10934-016-0143-x

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  59. Metal zirconium phosphate macroporous monoliths: Versatile synthesis, thermal expansion and mechanical properties Reviewed

    Zhu Yang, Kanamori Kazuyoshi, Moitra Nirmalya, Kadono Kohei, Ohi Shugo, Shimobayashi Norimasa, Nakanishi Kazuki

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 225   page: 122 - 127   2016.5

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    DOI: 10.1016/j.micromeso.2015.12.002

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  60. The chromatographic performance of flow-through particles: A computational fluid dynamics study Reviewed

    Smits Wim, Nakanishi Kazuki, Desmet Gert

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1429   page: 166 - 174   2016.1

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    DOI: 10.1016/j.chroma.2015.12.019

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  61. Hierarchically porous titanium phosphate monoliths and their crystallization behavior in ethylene glycol Reviewed

    Zhu Yang, Yoneda Koji, Kanamori Kazuyoshi, Takeda Kazuyuki, Kiyomura Tsutomu, Kurata Hiroki, Nakanishi Kazuki

    NEW JOURNAL OF CHEMISTRY   Vol. 40 ( 5 ) page: 4153 - 4159   2016

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    DOI: 10.1039/c5nj02820e

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  62. Mesoscopic superstructures of flexible porous coordination polymers synthesized <i>via</i> coordination replication. Reviewed

    Sumida K, Moitra N, Reboul J, Fukumoto S, Nakanishi K, Kanamori K, Furukawa S, Kitagawa S

    Chemical science   Vol. 6 ( 10 ) page: 5938 - 5946   2015.10

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    DOI: 10.1039/c5sc02034d

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  63. Spontaneous preparation of hierarchically porous silica monoliths with uniform spherical mesopores confined in a well-defined macroporous framework. Reviewed

    Guo X, Wang R, Yu H, Zhu Y, Nakanishi K, Kanamori K, Yang H

    Dalton transactions (Cambridge, England : 2003)   Vol. 44 ( 30 ) page: 13592 - 601   2015.8

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    DOI: 10.1039/c5dt01672j

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  64. High-performance liquid chromatography separation of unsaturated organic compounds by a monolithic silica column embedded with silver nanoparticles. Reviewed

    Zhu Y, Morisato K, Hasegawa G, Moitra N, Kiyomura T, Kurata H, Kanamori K, Nakanishi K

    Journal of separation science   Vol. 38 ( 16 ) page: 2841 - 7   2015.8

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    DOI: 10.1002/jssc.201500444

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  65. Correction to Effect of Calcination Conditions on Porous Reduced Titanium Oxides and Oxynitrides via a Preceramic Polymer Route. Reviewed

    Hasegawa G, Sato T, Kanamori K, Sun CJ, Ren Y, Kobayashi Y, Kageyama H, Abe T, Nakanishi K

    Inorganic chemistry   Vol. 54 ( 11 ) page: 5614   2015.6

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    DOI: 10.1021/acs.inorgchem.5b00810

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  66. Preparation of macroporous zirconia monoliths from ionic precursors via an epoxide-mediated sol-gel process accompanied by phase separation. Reviewed

    Guo X, Song J, Lvlin Y, Nakanishi K, Kanamori K, Yang H

    Science and technology of advanced materials   Vol. 16 ( 2 ) page: 025003   2015.4

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    DOI: 10.1088/1468-6996/16/2/025003

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  67. Effect of calcination conditions on porous reduced titanium oxides and oxynitrides via a preceramic polymer route. Reviewed

    Hasegawa G, Sato T, Kanamori K, Sun CJ, Ren Y, Kobayashi Y, Kageyama H, Abe T, Nakanishi K

    Inorganic chemistry   Vol. 54 ( 6 ) page: 2802 - 8   2015.3

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    DOI: 10.1021/ic502972v

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  68. Mechanically stable, hierarchically porous Cu3(btc)2 (HKUST-1) monoliths via direct conversion of copper(II) hydroxide-based monoliths. Reviewed

    Moitra N, Fukumoto S, Reboul J, Sumida K, Zhu Y, Nakanishi K, Furukawa S, Kitagawa S, Kanamori K

    Chemical communications (Cambridge, England)   Vol. 51 ( 17 ) page: 3511 - 4   2015.2

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    DOI: 10.1039/c4cc09694k

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  69. Efficiency of short, small-diameter columns for reversed-phase liquid chromatography under practical operating conditions Reviewed

    Ma Yan, Chassy Alexander W., Miyazaki Shota, Motokawa Masanori, Morisato Kei, Uzu Hideyuki, Ohira Masayoshi, Furuno Masahiro, Nakanishi Kazuki, Minakuchi Hiroyoshi, Mriziq Khaled, Farkas Tivadar, Fiehn Oliver, Tanaka Nobuo

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1383   page: 47 - 57   2015.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.chroma.2015.01.014

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  70. Direct preparation and conversion of copper hydroxide-based monolithic xerogels with hierarchical pores Reviewed

    Fukumoto Shotaro, Nakanishi Kazuki, Kanamori Kazuyoshi

    NEW JOURNAL OF CHEMISTRY   Vol. 39 ( 9 ) page: 6771 - 6777   2015

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c5nj00479a

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  71. Preparation of silver nanoparticles embedded hierarchically porous AlPO4 monoliths Reviewed

    Cai Xiaobo, Zhu Wenjun, Yang Hui, Xu Chenyang, Nakanishi Kazuki, Kanamori Kazuyoshi, Guo Xingzhong

    NEW JOURNAL OF CHEMISTRY   Vol. 39 ( 8 ) page: 6238 - 6243   2015

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c5nj00490j

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  72. Sol-gel synthesis of nanocrystal-constructed hierarchically porous TiO2 based composites for lithium ion batteries Reviewed

    Zhu Wenjun, Yang Hui, Nakanishi Kazuki, Kanamori Kazuyoshi, Guo Xingzhong

    RSC ADVANCES   Vol. 5 ( 31 ) page: 24803 - 24813   2015

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c5ra03491d

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  73. Facile synthesis of monolithic mayenite with well-defined macropores via an epoxide-mediated sol-gel process accompanied by phase separation Reviewed

    Guo Xingzhong, Cai Xiaobo, Song Jie, Zhu Yang, Nakanishi Kazuki, Kanamori Kazuyoshi, Yang Hui

    NEW JOURNAL OF CHEMISTRY   Vol. 38 ( 12 ) page: 5832 - 5839   2014.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c4nj00898g

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    Scopus

  74. Facile preparation of silver nanoparticles homogeneously immobilized in hierarchically monolithic silica using ethylene glycol as reductant Reviewed

    Yu Huan, Zhu Yang, Yang Hui, Nakanishi Kazuki, Kanamori Kazuyoshi, Guo Xingzhong

    DALTON TRANSACTIONS   Vol. 43 ( 33 ) page: 12648 - 12656   2014.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/C4DT00655K

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  75. Surface functionalization of silica by Si-H activation of hydrosilanes. Reviewed

    Moitra N, Ichii S, Kamei T, Kanamori K, Zhu Y, Takeda K, Nakanishi K, Shimada T

    Journal of the American Chemical Society   Vol. 136 ( 33 ) page: 11570 - 3   2014.8

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    DOI: 10.1021/ja504115d

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  76. Experimental and numerical validation of the effective medium theory for the B-term band broadening in 1st and 2nd generation monolithic silica columns. Reviewed

    Deridder S, Vanmessen A, Nakanishi K, Desmet G, Cabooter D

    Journal of chromatography. A   Vol. 1351   page: 46 - 55   2014.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.chroma.2014.04.099

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  77. Polymethylsilsesquioxane-cellulose nanofiber biocomposite aerogels with high thermal insulation, bendability, and superhydrophobicity. Reviewed

    Hayase G, Kanamori K, Abe K, Yano H, Maeno A, Kaji H, Nakanishi K

    ACS applied materials & interfaces   Vol. 6 ( 12 ) page: 9466 - 71   2014.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/am501822y

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  78. Detailed characterization of the kinetic performance of first and second generation silica monolithic columns for reversed-phase chromatography separations. Reviewed

    Cabooter D, Broeckhoven K, Sterken R, Vanmessen A, Vandendael I, Nakanishi K, Deridder S, Desmet G

    Journal of chromatography. A   Vol. 1325   page: 72 - 82   2014.1

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    DOI: 10.1016/j.chroma.2013.11.047

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  79. Pore structure control of macroporous methylsilsesquioxane monoliths prepared by in situ two-step processing Reviewed

    Guo Xingzhong, Yu Huan, Yang Hui, Kanamori Kazuyoshi, Zhu Yang, Nakanishi Kazuki

    JOURNAL OF POROUS MATERIALS   Vol. 20 ( 6 ) page: 1477 - 1483   2013.12

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    DOI: 10.1007/s10934-013-9733-z

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  80. A superamphiphobic macroporous silicone monolith with marshmallow-like flexibility. Reviewed

    Hayase G, Kanamori K, Hasegawa G, Maeno A, Kaji H, Nakanishi K

    Angewandte Chemie (International ed. in English)   Vol. 52 ( 41 ) page: 10788 - 91   2013.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/anie.201304169

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  81. Recyclable functionalization of silica with alcohols via dehydrogenative addition on hydrogen silsesquioxane. Reviewed

    Moitra N, Kamei T, Kanamori K, Nakanishi K, Takeda K, Shimada T

    Langmuir : the ACS journal of surfaces and colloids   Vol. 29 ( 39 ) page: 12243 - 53   2013.10

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    DOI: 10.1021/la402205j

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  82. Preparation of mullite monoliths with well-defined macropores and mesostructured skeletons via the sol-gel process accompanied by phase separation Reviewed

    Guo Xingzhong, Li Wenyan, Nakanishi Kazuki, Kanamori Kazuyoshi, Zhu Yang, Yang Hui

    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY   Vol. 33 ( 10 ) page: 1967 - 1974   2013.9

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    DOI: 10.1016/j.jeurceramsoc.2013.02.018

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  83. Sol-gel synthesis of macroporous TiO2 from ionic precursors via phase separation route Reviewed

    Li Wenyan, Guo Xingzhong, Zhu Yang, Hui Yang, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 67 ( 3 ) page: 639 - 645   2013.9

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    DOI: 10.1007/s10971-013-3123-5

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  84. Gelation behavior and phase separation of macroporous methylsilsesquioxane monoliths prepared by in situ two-step processing

    Guo Xingzhong, Li Wenyan, Yang Hui, Kanamori Kazuyoshi, Zhu Yang, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 67 ( 2 ) page: 406-413   2013.8

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    DOI: 10.1007/s10971-013-3094-6

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  85. Hierarchically porous nickel/carbon composite monoliths prepared by sol-gel method from an ionic precursor Reviewed

    Kido Yasuki, Nakanishi Kazuki, Okumura Nao, Kanamori Kazuyoshi

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 176   page: 64 - 70   2013.8

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    DOI: 10.1016/j.micromeso.2013.03.042

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  86. Preparation of a hierarchically porous AlPO<sub>4</sub> monolith via an epoxide-mediated sol-gel process accompanied by phase separation. Reviewed

    Li W, Zhu Y, Guo X, Nakanishi K, Kanamori K, Yang H

    Science and technology of advanced materials   Vol. 14 ( 4 ) page: 045007   2013.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1468-6996/14/4/045007

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  87. New Li2FeSiO4-carbon monoliths with controlled macropores: effects of pore properties on electrode performance. Reviewed

    Hasegawa G, Sannohe M, Ishihara Y, Kanamori K, Nakanishi K, Abe T

    Physical chemistry chemical physics : PCCP   Vol. 15 ( 22 ) page: 8736 - 43   2013.6

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    DOI: 10.1039/c3cp50352f

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  88. Fabrication of large-sized silica monolith exceeding 1000 mL with high structural homogeneity Reviewed

    Miyamoto Riichi, Ando Yukiko, Kurusu Chie, Bai Hong-zhi, Nakanishi Kazuki, Ippommatsu Masamichi

    JOURNAL OF SEPARATION SCIENCE   Vol. 36 ( 12 ) page: 1890 - 1896   2013.6

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    DOI: 10.1002/jssc.201300123

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  89. Synthesis of Silver Nanoparticles Confined in Hierarchically Porous Monolithic Silica: A New Function in Aromatic Hydrocarbon Separations Reviewed

    Zhu Yang, Morisato Kei, Li Wenyan, Kanamori Kazuyoshi, Nakanishi Kazuki

    ACS APPLIED MATERIALS & INTERFACES   Vol. 5 ( 6 ) page: 2118 - 2125   2013.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/am303163s

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  90. Macroporous SiO2 Monoliths Prepared via Sol-Gel Process Accompanied by Phase Separation Reviewed

    Guo Xing-Zhong, Li Wen-Yan, Zhu Yang, Nakanishi Kazuki, Kanamori Kazuyoshi, Yang Hui

    ACTA PHYSICO-CHIMICA SINICA   Vol. 29 ( 3 ) page: 646 - 652   2013.3

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    DOI: 10.3866/PKU.WHXB201212252

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  91. Facile synthesis of marshmallow-like macroporous gels usable under harsh conditions for the separation of oil and water. Reviewed

    Hayase G, Kanamori K, Fukuchi M, Kaji H, Nakanishi K

    Angewandte Chemie (International ed. in English)   Vol. 52 ( 7 ) page: 1986 - 9   2013.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/anie.201207969

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  92. Sol-gel synthesis of zinc ferrite-based xerogel monoliths with well-defined macropores Reviewed

    Kido Yasuki, Nakanishi Kazuki, Kanamori Kazuyoshi

    RSC ADVANCES   Vol. 3 ( 11 ) page: 3661 - 3666   2013

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    DOI: 10.1039/c3ra22481c

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  93. Selective preparation of macroporous monoliths of conductive titanium oxides Ti(n)O(2n-1) (n = 2, 3, 4, 6). Reviewed

    Kitada A, Hasegawa G, Kobayashi Y, Kanamori K, Nakanishi K, Kageyama H

    Journal of the American Chemical Society   Vol. 134 ( 26 ) page: 10894 - 8   2012.7

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    DOI: 10.1021/ja302083n

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  94. Synthesis of Monolithic Hierarchically Porous Iron-Based Xerogels from Iron(III) Salts via an Epoxide-Mediated Sol-Gel Process Reviewed

    Kido Yasuki, Nakanishi Kazuki, Miyasaka Akira, Kanamori Kazuyoshi

    CHEMISTRY OF MATERIALS   Vol. 24 ( 11 ) page: 2071 - 2077   2012.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/cm300495j

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  95. Flower-like surface modification of titania materials by lithium hydroxide solution. Reviewed

    Hasegawa G, Kanamori K, Sugawara Y, Ikuhara Y, Nakanishi K

    Journal of colloid and interface science   Vol. 374 ( 1 ) page: 291 - 6   2012.5

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    DOI: 10.1016/j.jcis.2012.02.002

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  96. New monolithic capillary columns with well-defined macropores based on poly(styrene-co-divinylbenzene). Reviewed

    Hasegawa G, Kanamori K, Ishizuka N, Nakanishi K

    ACS applied materials & interfaces   Vol. 4 ( 5 ) page: 2343 - 7   2012.5

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    DOI: 10.1021/am300552q

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  97. New flexible aerogels and xerogels derived from di- and trifunctional organosilanes co-precursors

    Hayase Gen, Kanamori Kazuyoshi, Nakanishi Kazuki

    Preprints of Annual Meeting of The Ceramic Society of Japan<br>Preprints of Fall Meeting of The Ceramic Society of Japan   Vol. 2012 ( 0 ) page: 280-280   2012

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    We report new flexible &ldquo;marshmallow-like&rdquo; aerogels and xerogels with a bendable feature from the di- and trifunctional organosilane co-precursor systems. A 2-step acid/base sol–gel process and surfactant are employed to control the phase separation of the hydrophobic networks, which give porous monolithic gels. The obtained gels from methyltrimethoxysilane (MTMS) and dimethyldimethoxysilane (DMDMS) become softer and more flexible with increasing DMDMS fractions.

    DOI: 10.14853/pcersj.2012S.0.280.0

    CiNii Article

  98. 612 Synthesis of Macroporous Layered Double Hydroxide with a Bulk Form for High Performance Ion Exchange Reaction

    TOKUDOME Yasuaki, TARUTANI Naoki, TAKAHASHI Masahide, NAKANISHI Kazuki

      Vol. 61   page: 159-160   2012

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  99. Hierarchically Porous Materials by Phase Separation: Monoliths Reviewed

    Nakanishi Kazuki

    HIERARCHICALLY STRUCTURED POROUS MATERIALS: FROM NANOSCIENCE TO CATALYSIS, SEPARATION, OPTICS, ENERGY, AND LIFE SCIENCE     page: 241 - 267   2012

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  100. Hierarchically Structured Porous Materials: Application to Separation Sciences Reviewed

    Nakanishi Kazuki

    HIERARCHICALLY STRUCTURED POROUS MATERIALS: FROM NANOSCIENCE TO CATALYSIS, SEPARATION, OPTICS, ENERGY, AND LIFE SCIENCE     page: 517 - 529   2012

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  101. Evolution of Mesopores in Monolithic Macroporous Ethylene-Bridged Polysilsesquioxane Gels Incorporated with Nonionic Surfactant Reviewed

    Mushiake Atsushi, Kanamori Kazuyoshi, Nakanishi Kazuki

    INTERNATIONAL JOURNAL OF POLYMER SCIENCE   Vol. 2012   2012

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    DOI: 10.1155/2012/460835

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  102. New hierarchically porous titania monoliths for chromatographic separation media. Reviewed

    Hasegawa G, Morisato K, Kanamori K, Nakanishi K

    Journal of separation science   Vol. 34 ( 21 ) page: 3004 - 10   2011.11

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    DOI: 10.1002/jssc.201100538

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  103. Performance evaluation of long monolithic silica capillary columns in gradient liquid chromatography using peptide mixtures Reviewed

    Eghbali Hamed, Sandra Koen, Detobel Frederik, Lynen Frederic, Nakanishi Kazuki, Sandra Pat, Desmet Gert

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1218 ( 21 ) page: 3360 - 3366   2011.5

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    DOI: 10.1016/j.chroma.2010.10.045

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  104. Transition from transparent aerogels to hierarchically porous monoliths in polymethylsilsesquioxane sol-gel system. Reviewed

    Kanamori K, Kodera Y, Hayase G, Nakanishi K, Hanada T

    Journal of colloid and interface science   Vol. 357 ( 2 ) page: 336 - 44   2011.5

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    DOI: 10.1016/j.jcis.2011.02.027

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  105. Monolithic silica rod columns for high-efficiency reversed-phase liquid chromatography Reviewed

    Miyazaki Shota, Takahashi Masakazu, Ohira Masayoshi, Terashima Hiroyuki, Morisato Kei, Nakanishi Kazuki, Ikegami Tohru, Miyabe Kanji, Tanaka Nobuo

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1218 ( 15 ) page: 1988 - 1994   2011.4

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    DOI: 10.1016/j.chroma.2010.11.032

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  106. Synthesis of hierarchical macro/mesoporous dicalcium phosphate monolith via epoxide-mediated sol-gel reaction from ionic precursors Reviewed

    Tokudome Yasuaki, Miyasaka Akira, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 57 ( 3 ) page: 269 - 278   2011.3

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    DOI: 10.1007/s10971-010-2184-y

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  107. (3-Mercaptopropyl)trimethoxysilane-derived Porous Gel Monolith via Thioacetal Reaction-Assisted Sol-Gel Route

    Ito S., Nishi M., Kanamori K., Nakanishi K., Kurahashi T., Matsubara S., Shimotsuma Y., Miura K., Hirao K.

    3RD INTERNATIONAL CONGRESS ON CERAMICS (ICC): NOVEL CHEMICAL PROCESSING SOL-GEL AND SOLUTION-BASED PROCESSING   Vol. 18 ( SYMPOSIUM 2A )   2011

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    DOI: 10.1088/1757-899X/18/3/032003

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    Scopus

  108. Controlled pore formation in organotrialkoxysilane-derived hybrids: from aerogels to hierarchically porous monoliths Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki

    CHEMICAL SOCIETY REVIEWS   Vol. 40 ( 2 ) page: 754 - 770   2011

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c0cs00068j

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  109. Pore Structure and Mechanical Properties of Poly(methylsilsesquioxane) Aerogels Reviewed

    Kanamori K., Hayase G., Nakanishi K., Hanada T.

    3RD INTERNATIONAL CONGRESS ON CERAMICS (ICC): NOVEL CHEMICAL PROCESSING SOL-GEL AND SOLUTION-BASED PROCESSING   Vol. 18   2011

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1757-899X/18/3/032001

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  110. In situ SAXS observation on metal-salt-derived alumina sol-gel system accompanied by phase separation. Reviewed

    Tokudome Y, Nakanishi K, Kanamori K, Hanada T

    Journal of colloid and interface science   Vol. 352 ( 2 ) page: 303 - 8   2010.12

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    DOI: 10.1016/j.jcis.2010.08.041

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  111. Hierarchically porous carbon monoliths with high surface area from bridged polysilsesquioxanes without thermal activation process. Reviewed

    Hasegawa G, Kanamori K, Nakanishi K, Hanada T

    Chemical communications (Cambridge, England)   Vol. 46 ( 42 ) page: 8037 - 9   2010.11

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    DOI: 10.1039/c0cc02974b

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  112. Synthesis of high-silica and low-silica zeolite monoliths with trimodal pores Reviewed

    Tokudome Yasuaki, Nakanishi Kazuki, Kosaka Sho, Kariya Ayuta, Kaji Hironori, Hanada Teiichi

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 132 ( 3 ) page: 538 - 542   2010.8

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    DOI: 10.1016/j.micromeso.2010.04.005

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  113. A new route to monolithic macroporous SiC/C composites from biphenylene-bridged polysilsesquioxane gels

    Hasegawa G.

    Chemistry of Materials   Vol. 22 ( 8 ) page: 2541-2547   2010.4

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    DOI: 10.1021/cm9034616

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  114. Sol-gel synthesis, porous structure, and mechanical property of polymethylsilsesquioxane aerogels Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 117 ( 1372 ) page: 1333 - 1338   2009.12

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    DOI: 10.2109/jcersj2.117.1333

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  115. Semi-micro-monolithic columns using macroporous silica rods with improved performance Reviewed

    Morisato Kei, Miyazaki Shota, Ohira Masayoshi, Furuno Masahiro, Nyudo Masahiko, Terashima Hiroyuki, Nakanishi Kazuki

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1216 ( 44 ) page: 7384 - 7387   2009.10

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    DOI: 10.1016/j.chroma.2009.05.028

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  116. Sol-gel synthesis of macro-mesoporous titania monoliths and their applications to chromatographic separation media for organophosphate compounds Reviewed

    Konishi Junko, Fujita Koji, Nakanishi Kazuki, Hirao Kazuyuki, Morisato Kei, Miyazaki Shota, Ohira Masayoshi

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1216 ( 44 ) page: 7375 - 7383   2009.10

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    DOI: 10.1016/j.chroma.2009.06.016

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  117. Structural characterization of hierarchically porous alumina aerogel and xerogel monoliths. Reviewed

    Tokudome Y, Nakanishi K, Kanamori K, Fujita K, Akamatsu H, Hanada T

    Journal of colloid and interface science   Vol. 338 ( 2 ) page: 506 - 13   2009.10

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    DOI: 10.1016/j.jcis.2009.06.042

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  118. Performance of wide-pore monolithic silica column in protein separation Reviewed

    Morisaka Hironobu, Kobayashi Kengo, Kirino Aya, Furuno Masahiro, Minakuchi Hiroyoshi, Nakanishi Kazuki, Ueda Mitsuyoshi

    JOURNAL OF SEPARATION SCIENCE   Vol. 32 ( 15-16 ) page: 2747 - 2751   2009.8

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    DOI: 10.1002/jssc.200800653

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  119. Rigid crosslinked polyacrylamide monoliths with well-defined macropores synthesized by living polymerization. Reviewed

    Hasegawa J, Kanamori K, Nakanishi K, Hanada T, Yamago S

    Macromolecular rapid communications   Vol. 30 ( 12 ) page: 986 - 90   2009.6

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    DOI: 10.1002/marc.200900066

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  120. Effect of La addition on thermal microstructural evolution of macroporous alumina monolith prepared from ionic precursors Reviewed

    Tokudome Yasuaki, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 117 ( 1363 ) page: 351 - 355   2009.3

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    DOI: 10.2109/jcersj2.117.351

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  121. Spinodal decomposition in siloxane sol-gel systems in macroporous media Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    SOFT MATTER   Vol. 5 ( 16 ) page: 3106 - 3113   2009

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    DOI: 10.1039/b903444g

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  122. Elastic organic-inorganic hybrid aerogels and xerogels Reviewed

    Kanamori Kazuyoshi, Aizawa Mamoru, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 48 ( 1-2 ) page: 172 - 181   2008.11

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    DOI: 10.1007/s10971-008-1756-6

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  123. Scattering-based hole burning through volume speckles in a random medium with tunable diffusion constant Reviewed

    Murai Shunsuke, Fujita Koji, Hirao Takayuki, Nakanishi Kazuki, Hirao Kazuyuki, Tanaka Katsuhisa

    APPLIED PHYSICS LETTERS   Vol. 93 ( 15 )   2008.10

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    DOI: 10.1063/1.2955830

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  124. Preparation and properties of radiofrequency sputtered X-ray amorphous films in the system SiO2-ZrO2 Reviewed

    Sawa Akira, Nakanishi Kazuki, Hanada Teiichi

    THIN SOLID FILMS   Vol. 516 ( 15 ) page: 4665 - 4672   2008.6

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    DOI: 10.1016/j.tsf.2007.08.012

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  125. Preparation of monolithic silica columns for high-performance liquid chromatography Reviewed

    Nunez Oscar, Nakanishi Kazuki, Tanaka Nobuo

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1191 ( 1-2 ) page: 231 - 252   2008.5

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    DOI: 10.1016/j.chroma.2008.02.029

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  126. Crystalline ZrO2 monoliths with well-defined macropores and mesostructured skeletons prepared by combining the alkoxy-derived sol-gel process accompanied by phase separation and the solvothermal process Reviewed

    Konishi Junko, Fujita Koji, Oiwa Satoshi, Nakanishi Kazuki, Hirao Kazuyuki

    CHEMISTRY OF MATERIALS   Vol. 20 ( 6 ) page: 2165 - 2173   2008.3

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    DOI: 10.1021/cm703351d

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  127. Multiscale templating of siloxane gels via polymerization-induced phase separation Reviewed

    Nakanishi Kazuki, Amatani Tomohiko, Yano Seiji, Kodaira Tetsuya

    CHEMISTRY OF MATERIALS   Vol. 20 ( 3 ) page: 1108 - 1115   2008.2

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    DOI: 10.1021/cm702486b

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  128. 22aYE-7 Effect of the gel structure on the acoustic property of liquid ^4He in silica gel

    Ohmori K., Tanaka T., Abe S., Tsujii H., Suzuki H., Matsumoto K., Nakanishi K., Kanamori K.

    Meeting Abstracts of the Physical Society of Japan   Vol. 63 ( 0 )   2008

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    DOI: 10.11316/jpsgaiyo.63.2.4.0_709_3

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  129. Hierarchically porous oxides, hybrids and polymers via sol-gel accompanied by phase separation Reviewed

    Nakanishi Kazuki

    ORGANIC/INORGANIC HYBRID MATERIALS - 2007   Vol. 1007   page: 51 - 62   2008

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  130. Phase separation in alkoxy-derived silica system containing polyacrylamide Reviewed

    Kawamoto Kousuke, Nakanishi Kazuki, Hanada Teiichi

    ORGANIC/INORGANIC HYBRID MATERIALS - 2007   Vol. 1007   page: 63 - 68   2008

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  131. Phase separation in Al2O3 sol-gel system incorporated with high molecular weight poly(ethylene oxide) Reviewed

    Tokudome Yasuaki, Nakanishi Kazuki, Fujita Koji, Miura Kiyotaka, Hirao Kazuyuki

    ORGANIC/INORGANIC HYBRID MATERIALS - 2007   Vol. 1007   page: 69 - 74   2008

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  132. Sur-face interaction of well-defined, concentrated poly,(2-hydroxyethyl methacrylate) brushes with proteins Reviewed

    Yoshikawa Chiaki, Goto Atsushi, Tsujii Yoshinobu, Ishizuka Norio, Nakanishi Kazuki, Fukuda Takeshi

    JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY   Vol. 45 ( 21 ) page: 4795 - 4803   2007.11

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    DOI: 10.1002/pola.22224

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  133. Real space observation of silica monoliths in the formation process. Reviewed

    Saito H, Kanamori K, Nakanishi K, Hirao K

    Journal of separation science   Vol. 30 ( 17 ) page: 2881 - 7   2007.11

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    DOI: 10.1002/jssc.200700360

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  134. Sol-gel with phase separation. Hierarchically porous materials optimized for high-performance liquid chromatography separations Reviewed

    Nakanishi Kazuki, Tanaka Nobuo

    ACCOUNTS OF CHEMICAL RESEARCH   Vol. 40 ( 9 ) page: 863 - 873   2007.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ar600034p

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  135. Synthesis of monolithic Al2O3 with well-defined macropores and mesostructured skeletons via the sol-gel process accompanied by phase separation Reviewed

    Tokudome Yasuaki, Fujita Koji, Nakanishi Kazuki, Miura Kiyotaka, Hirao Kazuyuki

    CHEMISTRY OF MATERIALS   Vol. 19 ( 14 ) page: 3393 - 3398   2007.7

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    DOI: 10.1021/cm063051p

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  136. New transparent methylsilsesquioxane aerogels and xerogels with improved mechanical properties Reviewed

    Kanamori Kazuyoshi, Aizawa Mamoru, Nakanishi Kazuki, Hanada Teiichi

    ADVANCED MATERIALS   Vol. 19 ( 12 ) page: 1589 - +   2007.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/adma.200602457

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  137. Simple liquid chromatography using monolithic silica rod and capillary Reviewed

    Oi Naobumi, Morisato Kei, Minakuchi Hiroyoshi, Nakanishi Kazuki

    BUNSEKI KAGAKU   Vol. 56 ( 4 ) page: 227 - 229   2007.4

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  138. Temperature-tunable scattering strength based on the phase transition of liquid crystal infiltrated in well-defined macroporous random media Reviewed

    Murai Shunsuke, Fujita Koji, Hirao Takayuki, Nakanishi Kazuki, Hirao Kazuyuki

    OPTICAL MATERIALS   Vol. 29 ( 8 ) page: 949 - 954   2007.4

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    DOI: 10.1016/j.optmat.2005.11.032

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  139. Functional porous materials via sol-gel with phase separation Reviewed

    Nakanishi Kazuki

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 115 ( 1339 ) page: 169 - 175   2007.3

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  140. High-throughput protein digestion by trypsin-immobilized monolithic silica with pipette-tip formula Reviewed

    Ota Shigenori, Miyazaki Shota, Matsuoka Hideo, Morisato Kei, Shintani Yukihiro, Nakanishi Kazuki

    JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS   Vol. 70 ( 1 ) page: 57 - 62   2007.2

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    DOI: 10.1016/j.jbbm.2006.10.005

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  141. Size-exclusion effect and protein repellency of concentrated polymer brushes prepared by surface-initiated living radical polymerization Reviewed

    Yoshikawa Chiaki, Goto Atsushi, Ishizuka Norio, Nakanishi Kazuki, Kishida Akio, Tsujii Yoshinobit, Fukuda Takeshi

    MACROMOLECULAR SYMPOSIA   Vol. 248   page: 189 - 198   2007

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    DOI: 10.1002/masy.200750220

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  142. Monolithic TiO2 with controlled multiscale porosity via a template-free sol-gel process accompanied by phase separation Reviewed

    Konishi Junko, Fujita Koji, Nakanishi Kazuki, Hirao Kazuyuki

    CHEMISTRY OF MATERIALS   Vol. 18 ( 25 ) page: 6069 - 6074   2006.12

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    DOI: 10.1021/cm0617485

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  143. Performance of monolithic silica capillary columns with increased phase ratios and small-sized domains. Reviewed

    Hara T, Kobayashi H, Ikegami T, Nakanishi K, Tanaka N

    Analytical chemistry   Vol. 78 ( 22 ) page: 7632 - 42   2006.11

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    DOI: 10.1021/ac060770e

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  144. Performance of octadecylsilylated monolithic silica capillary columns of 530 mu m inner diameter in HPLC Reviewed

    Motokawa Masanori, Ohira Masayoshi, Minakuchi Hiroyoshi, Nakanishi Kazuk, Tanaka Nobuo

    JOURNAL OF SEPARATION SCIENCE   Vol. 29 ( 16 ) page: 2471 - 2477   2006.11

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    DOI: 10.1002/jssc.200600335

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  145. Thick silica gel coatings on methylsilsesquioxane monoliths using anisotropic phase separation Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF SEPARATION SCIENCE   Vol. 29 ( 16 ) page: 2463 - 2470   2006.11

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    DOI: 10.1002/jssc.200600163

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  146. Rigid macroporous poly(divinylbenzene) monoliths with a well-defined bicontinuous morphology prepared by living radical polymerization Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    ADVANCED MATERIALS   Vol. 18 ( 18 ) page: 2407 - +   2006.9

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    DOI: 10.1002/adma.200601026

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  147. Morphological control and strong light scattering in macroporous TiO2 monoliths prepared via a colloid-derived sol-gel route Reviewed

    Fujita Koji, Konishi Junko, Nakanishi Kazuki, Hirao Kazuyuki

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS   Vol. 7 ( 6 ) page: 511 - 518   2006.9

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    DOI: 10.1016/j.stam.2006.04.014

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  148. High-performance liquid chromatographic enantioseparations on capillary columns containing crosslinked polysaccharide phenylcarbamate derivatives attached to monolithic silica Reviewed

    Chankvetadze Bezhan, Kubota Takateru, Ikai Tomoyuki, Yamamoto Chiyo, Kamigaito Masami, Tanaka Nobuo, Nakanishi Kazuki, Okamoto Yoshio

    JOURNAL OF SEPARATION SCIENCE   Vol. 29 ( 13 ) page: 1988 - 1995   2006.8

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    DOI: 10.1002/jssc.200500388

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  149. Fabrication of Sm2+-doped macroporous aluminosilicate glasses with high alumina content Reviewed

    Hirao Takayuki, Fujita Koji, Murai Shunsuke, Nakanishi Kazuki, Hirao Kazuyuki

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 352 ( 23-25 ) page: 2553 - 2557   2006.7

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    DOI: 10.1016/j.jnoncrysol.2006.02.101

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  150. Formation of photonic structures in Sm2+-doped aluminosilicate glasses through phase separation Reviewed

    Fujita Koji, Murai Shunsuke, Nakanishi Kazuki, Hirao Kazuyuki

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 352 ( 23-25 ) page: 2496 - 2500   2006.7

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    DOI: 10.1016/j.jnoncrysol.2006.03.024

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  151. Anisotropic siloxane-based monolith prepared in confined spaces Reviewed

    Suzumura Yoshitaka, Kanamori Kazuyoshi, Nakanishi Kazuki, Hirao Kazuyuki, Yamamichi Junta

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1119 ( 1-2 ) page: 88 - 94   2006.6

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    DOI: 10.1016/j.chroma.2006.02.059

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  152. Mutual consistency between simulated and measured pressure drops in silica monoliths based on geometrical parameters obtained by three-dimensional laser scanning confocal microscope observations Reviewed

    Saito Haruko, Nakanishi Kazuki, Hirao Kazuyuki, Jinnai Hiroshi

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1119 ( 1-2 ) page: 95 - 104   2006.6

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    DOI: 10.1016/j.chroma.2006.03.087

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  153. Sol-gel process of oxides accompanied by phase separation Reviewed

    Nakanishi Kazuki

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   Vol. 79 ( 5 ) page: 673 - 691   2006.5

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    DOI: 10.1246/bcsj.79.673

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  154. High-performance liquid chromatographic enantioseparations on capillary columns containing monolithic silica modified with amylose tris(3,5-dimethylphenylcarbamate) Reviewed

    Chankvetadze B, Yamamoto C, Kamigaito M, Tanaka N, Nakanishi K, Okamoto Y

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1110 ( 1-2 ) page: 46 - 52   2006.3

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    DOI: 10.1016/j.chroma.2006.01.076

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  155. Phase-separation-induced Titania monoliths with well-derined macropores and mesostructured framework from colloid-derived sol-gel systems Reviewed

    Konishi J, Fujita K, Nakanishi K, Hirao K

    CHEMISTRY OF MATERIALS   Vol. 18 ( 4 ) page: 864 - 866   2006.2

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    DOI: 10.1021/cm052155h

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  156. Direct observation of the spatial distribution of samarium ions in alumina-silica macroporous monoliths by laser scanning confocal microscopy Reviewed

    Murai S, Fujita K, Nakanishi K, Hirao K

    JOURNAL OF ALLOYS AND COMPOUNDS   Vol. 408   page: 831 - 834   2006.2

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    DOI: 10.1016/j.jallcom.2005.01.085

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  157. Basic study of the gelation of dimethacrylate-type crosslinking agents Reviewed

    Aoki H, Hosoya K, Norisuye T, Tanaka N, Tokuda D, Ishizuka N, Nakanishi K

    JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY   Vol. 44 ( 2 ) page: 949 - 958   2006.1

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    DOI: 10.1002/pola.21205

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  158. Size exclusion chromatography of standard polystyrenes with a wide range of molecular weight up to 7.45 x 10(6) on monolithic silica capillary columns Reviewed

    Ute Koichi, Yoshida Saori, Kitayama Tatsuki, Bamba Takeshi, Harada Kazuo, Fukusaki Eiichiro, Kobayashi Akio, Ishizuka Norio, Minakuchi Hiroyoshi, Nakanishi Kazuki

    POLYMER JOURNAL   Vol. 38 ( 11 ) page: 1194 - 1197   2006

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    DOI: 10.1295/polymj.PJ2006079

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  159. Porous methylsiloxane gel thick film for millimeter-wave antenna substrate prepared by gap filling method Reviewed

    Tanaka Takeharu, Kawakami Nobuyuki, Hirano Takayuki, Fukumoto Yoshito, Suzuki Tetsuo, Kanamori Kazuyoshi, Nakanishi Kazuki

    MATERIAL AND DEVICES FOR SMART SYSTEMS II   Vol. 888   page: 251 - +   2006

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  160. An application of silica-based monolithic membrane emulsification technique for easy and efficient preparation of uniformly sized polymer particles Reviewed

    Hosoya K, Bendo M, Tanaka N, Watabe Y, Ikegami T, Minakuchi H, Nakanishi K

    MACROMOLECULAR MATERIALS AND ENGINEERING   Vol. 290 ( 8 ) page: 753 - 758   2005.8

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    DOI: 10.1002/mame.200500006

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  161. Experimental validation of the tetrahedral skeleton model pressure drop correlation for silica monoliths and the influence of column heterogeneity Reviewed

    Vervoort N, Saito H, Nakanishi K, Desmet G

    ANALYTICAL CHEMISTRY   Vol. 77 ( 13 ) page: 3986 - 3992   2005.7

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    DOI: 10.1021/ac0502798

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  162. Silica monolithic membrane as separation medium - Summable property of different membranes for high-performance liquid chromatographic separation Reviewed

    Hosoya K, Ogata T, Watabe Y, Kubo T, Ikegami T, Tanaka N, Minakuchi H, Nakanishi K

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1073 ( 1-2 ) page: 123 - 126   2005.5

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    DOI: 10.1016/j.chroma.2004.09.042

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  163. Monolithic periodic mesoporous silica with well-defined macropores Reviewed

    Amatani T, Nakanishi K, Hirao K, Kodaira T

    CHEMISTRY OF MATERIALS   Vol. 17 ( 8 ) page: 2114 - 2119   2005.4

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    DOI: 10.1021/cm048091c

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  164. High-performance frontal analysis of the binding of thyroxine enantiomers to human serum albumin Reviewed

    Kimura T, Nakanishi K, Nakagawa T, Shibukawa A, Matsuzaki K

    PHARMACEUTICAL RESEARCH   Vol. 22 ( 4 ) page: 667 - 675   2005.4

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    DOI: 10.1007/s11095-005-2485-y

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  165. Recent advances in the design of monolithic silica columns: From small to big dimensions. Reviewed

    Cabrera K, Kraus A, Minakuchi H, Nakanishi K

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   Vol. 229   page: U144 - U144   2005.3

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  166. Insight on structural change in sol-gel-derived silica gel with aging under basic conditions for mesopore control Reviewed

    Takahashi R, Nakanishi K, Soga N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 33 ( 2 ) page: 159 - 167   2005.2

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  167. Titania-coated monolithic silica as separation medium for high performance liquid chromatography of phosphorus-containing compounds Reviewed

    Miyazaki S, Miah MY, Morisato K, Shintani Y, Kuroha T, Nakanishi K

    JOURNAL OF SEPARATION SCIENCE   Vol. 28 ( 1 ) page: 39 - 44   2005.1

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    DOI: 10.1002/jssc.200401932

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  168. Formation of photonic structures inSM(2+)-doped aluminosilicate glasses through phase separation Reviewed

    Fujita K, Murai S, Nakanishi K, Hirao K

    Micromachining Technology for Micro-Optics and Nano-Optics III   Vol. 5720   page: 261 - 268   2005

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1117/12.590712

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  169. Topical application of ionic polymers affects skin permeability barrier homeostasis Reviewed

    Denda M, Nakanishi K, Kumazawa N

    SKIN PHARMACOLOGY AND PHYSIOLOGY   Vol. 18 ( 1 ) page: 36 - 41   2005

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    DOI: 10.1159/000081684

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  170. Fabrication of macroporous TiO2 monoliths for photonic applications Reviewed

    Konishi J, Fujita K, Nakanishi K, Hirao K

    Micromachining Technology for Micro-Optics and Nano-Optics III   Vol. 5720   page: 233 - 240   2005

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    DOI: 10.1117/12.591059

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  171. Hierarchical macro-mesoporous silica monolith Reviewed

    Amatani T, Nakanishi K, Hirao K, Kodaira T

    Organic/Inorganic Hybrid Materials-2004   Vol. 847   page: 121 - 126   2005

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  172. Organic-inorganic hybrid poly(silsesquioxane) monoliths with controlled macro- and mesopores Reviewed

    Nakanishi K, Kanamori K

    JOURNAL OF MATERIALS CHEMISTRY   Vol. 15 ( 35-36 ) page: 3776 - 3786   2005

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/b508415f

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  173. Monolithic O/I-hybrids with hierarchically ordered meso- and macropores Reviewed

    Nakanishi K, Kobayashi Y, Amatani T, Hirao K, Kodaira T

    ORGANIC/INORGANIC HYBRID MATERIALS-2004   Vol. 847   page: 147 - 157   2005

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  174. Three dimensional structure and liquid transport behavior of siloxane gels with co-continuous macropores Reviewed

    Saito H, Nakanishi K, Hirao K, Jinnai H, Morisato K, Minakuchi H

    ORGANIC/INORGANIC HYBRID MATERIALS-2004   Vol. 847   page: 203 - 208   2005

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  175. Strong light scattering in macroporous TiO2 monoliths induced by phase separation Reviewed

    Fujita K, Konishi J, Nakanishi K, Hirao K

    APPLIED PHYSICS LETTERS   Vol. 85 ( 23 ) page: 5595 - 5597   2004.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.1823596

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  176. Morphology control of phase-separation-induced alumina-silica macroporous gels for rare-earth-doped scattering media Reviewed

    Murai S, Fujita K, Nakanishi K, Hirao K

    JOURNAL OF PHYSICAL CHEMISTRY B   Vol. 108 ( 43 ) page: 16670 - 16676   2004.10

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    DOI: 10.1021/jp0481658

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  177. Fabrication of dye-infiltrated macroporous silica for laser amplification Reviewed

    Murai S, Fujita K, Nakanishi K, Hirao K

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 345   page: 438 - 442   2004.10

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    DOI: 10.1016/j.jnoncrysol.2004.08.059

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  178. Spontaneous formation of hierarchical macro-mesoporous ethane-silica monolith Reviewed

    Nakanishi K, Kobayashi Y, Amatani T, Hirao K, Kodaira T

    CHEMISTRY OF MATERIALS   Vol. 16 ( 19 ) page: 3652 - 3658   2004.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/cm049320y

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  179. Formation of interconnected macropores in Sm2+-doped silicate glasses through phase separation: Fabrication of photosensitive and dielectrically disordered materials

    Fujita K, Murai S, Ohashi Y, Nakanishi K, Hirao K

    CHEMISTRY LETTERS   Vol. 33 ( 9 ) page: 1120-1121   2004.9

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  180. Formation of interconnected macropores in Sm<sup>2+</sup>-doped silicate glasses through phase separation: Fabrication of photosensitive and dielectrically disordered materials

    Fujita K.

    Chemistry Letters   Vol. 33 ( 9 ) page: 1120-1121   2004.9

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    DOI: 10.1246/cl.2004.1120

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  181. Tailoring photonic strength in monolithic macroporous silica for random media Reviewed

    Murai S, Fujita K, Nakanishi K, Hirao K

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS   Vol. 43 ( 8A ) page: 5359 - 5364   2004.8

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    DOI: 10.1143/JJAP.43.5359

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  182. Development of a monolithic silica extraction tip for the analysis of proteins Reviewed

    Miyazaki S, Morisato K, Ishizuka N, Minakuchi H, Shintani Y, Furuno M, Nakanishi K

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1043 ( 1 ) page: 19 - 25   2004.7

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    DOI: 10.1016/j.chroma.2004.03.025

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  183. High-performance liquid chromatographic enantioseparations on capillary columns containing monolithic Reviewed

    Chankvetadze B, Yamamoto C, Tanaka N, Nakanishi K, Okamoto Y

    JOURNAL OF SEPARATION SCIENCE   Vol. 27 ( 10-11 ) page: 905 - 911   2004.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/jssc.200401819

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  184. Simple 2D-HPLC using a monolithic silica column for peptide separation Reviewed

    Kimura H, Tanigawa T, Morisaka H, Ikegami T, Hosoya K, Ishizuka N, Minakuchi H, Nakanishi K, Ueda M, Cabrera K, Tanaka N

    JOURNAL OF SEPARATION SCIENCE   Vol. 27 ( 10-11 ) page: 897 - 904   2004.7

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    DOI: 10.1002/jssc.200401842

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  185. Structural formation of hybrid siloxane-based polymer monolith in confined spaces. Reviewed

    Kanamori K, Yonezawa H, Nakanishi K, Hirao K, Jinnai H

    Journal of separation science   Vol. 27 ( 10-11 ) page: 874 - 86   2004.7

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    DOI: 10.1002/jssc.200401816

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  186. Simple and comprehensive two-dimensional reversed-phase HPLC using monolithic silica columns Reviewed

    Tanaka N, Kimura H, Tokuda D, Hosoya K, Ikegami T, Ishizuka N, Minakuchi H, Nakanishi K, Shintani Y, Furuno M, Cabrera K

    ANALYTICAL CHEMISTRY   Vol. 76 ( 5 ) page: 1273 - 1281   2004.3

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    DOI: 10.1021/ac034925j

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  187. Controlled hierarchical pore structures in ethylene-bridged polysilsesquioxane gels Reviewed

    Kobayashi Y, Nakanishi K, Hirao K

    CONTINUOUS NANOPHASE AND NANOSTRUCTURED MATERIALS   Vol. 788   page: 353 - 358   2004

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  188. Macroporous silica and alkylene-bridged polysilsesquioxane gels with templated nanopores Reviewed

    Nakanishi K

    CONTINUOUS NANOPHASE AND NANOSTRUCTURED MATERIALS   Vol. 788   page: 337 - 346   2004

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  189. Macroporous morphology induced by phase separation in sol-gel systems derived from titania colloid Reviewed

    Konishi J, Fujita K, Nakanishi K, Hirao K

    CONTINUOUS NANOPHASE AND NANOSTRUCTURED MATERIALS   Vol. 788   page: 391 - 396   2004

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  190. Monolithic silica-based capillary reversed-phase liquid chromatography/electrospray mass spectrometry for plant metabolomics Reviewed

    Tolstikov VV, Lommen A, Nakanishi K, Tanaka N, Fiehn O

    ANALYTICAL CHEMISTRY   Vol. 75 ( 23 ) page: 6737 - 6740   2003.12

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    DOI: 10.1021/ac034716z

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  191. Monolithic silica columns with chemically bonded beta-cyclodextrin as a stationary phase for enantiomer separations of chiral pharmaceuticals Reviewed

    Lubda D, Cabrera K, Nakanishi K, Lindner W

    ANALYTICAL AND BIOANALYTICAL CHEMISTRY   Vol. 377 ( 5 ) page: 892 - 901   2003.11

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    DOI: 10.1007/s00216-003-2181-x

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  192. Bonelike apatite formation on ethylene-vinyl alcohol copolymer modified with silane coupling agent and calcium silicate solutions Reviewed

    Oyane A, Kawashita M, Nakanishi K, Kokubo T, Minoda M, Miyamoto T, Nakamura T

    BIOMATERIALS   Vol. 24 ( 10 ) page: 1729 - 1735   2003.5

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    DOI: 10.1016/S0142-9612(02)00581-1

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  193. Monolithic silica column for in-tube solid-phase microextraction coupled to high-performance liquid chromatography Reviewed

    Shintani Y, Zhou X, Furuno M, Minakuchi H, Nakanishi K

    JOURNAL OF CHROMATOGRAPHY A   Vol. 985 ( 1-2 ) page: 351 - 357   2003.1

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  194. Monolithic silica column for in-tube solid-phase microextraction coupled to high-performance liquid chromatography. Reviewed

    Shintani Y, Zhou X, Furuno M, Minakuchi H, Nakanishi K

    Journal of chromatography. A   Vol. 985 ( 1-2 ) page: 351 - 7   2003.1

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    DOI: 10.1016/s0021-9673(02)01447-4

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  195. Phase separation in sol-gel system containing mixture of 3-and 4-functional alkoxysilanes Reviewed

    Itagaki A, Nakanishi K, Hirao K

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 26 ( 1-3 ) page: 153 - 156   2003.1

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  196. Supramolecular templating of mesopores in phase-separating silica sol-gels incorporated with cationic surfactant Reviewed

    Nakanishi K, Sato Y, Ruyat Y, Hirao K

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 26 ( 1-3 ) page: 567 - 570   2003.1

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  197. Monolithic silica columns for high-efficiency chromatographic separations Reviewed

    Tanaka N, Kobayashi H, Ishizuka N, Minakuchi H, Nakanishi K, Hosoya K, Ikegami T

    JOURNAL OF CHROMATOGRAPHY A   Vol. 965 ( 1-2 ) page: 35 - 49   2002.8

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  198. Monolithic silica columns for high-efficiency chromatographic separations. Reviewed

    Tanak N, Kobayashi H, Ishizuka N, Minakuchi H, Nakanishi K, Hosoya K, Ikegami T

    Journal of chromatography. A   Vol. 965 ( 1-2 ) page: 35 - 49   2002.8

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    DOI: 10.1016/s0021-9673(01)01582-5

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  199. Monolithic silica columns with various skeleton sizes and through-pore sizes for capillary liquid chromatography Reviewed

    Motokawa M, Kobayashi H, Ishizuka N, Minakuchi H, Nakanishi K, Jinnai H, Hosoya K, Ikegami T, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 961 ( 1 ) page: 53 - 63   2002.6

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  200. Monolithic silica columns with various skeleton sizes and through-pore sizes for capillary liquid chromatography. Reviewed

    Motokawa M, Kobayashi H, Ishizuka N, Minakuchi H, Nakanishi K, Jinnai H, Hosoya K, Ikegami T, Tanaka N

    Journal of chromatography. A   Vol. 961 ( 1 ) page: 53 - 63   2002.6

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    DOI: 10.1016/s0021-9673(02)00133-4

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  201. Monolithic silica columns for high-efficiency separations by high-performance liquid chromatography Reviewed

    Ishizuka N, Kobayashi H, Minakuchi H, Nakanishi K, Hirao K, Hosoya K, Ikegami T, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 960 ( 1-2 ) page: 85 - 96   2002.6

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  202. Monolithic silica columns for high-efficiency separations by high-performance liquid chromatography. Reviewed

    Ishizuka N, Kobayashi H, Minakuchi H, Nakanishi K, Hirao K, Hosoya K, Ikegami T, Tanaka N

    Journal of chromatography. A   Vol. 960 ( 1-2 ) page: 85 - 96   2002.6

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    DOI: 10.1016/s0021-9673(01)01580-1

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  203. Monolithic HPLC silica columns Reviewed

    Lubda D, Cabrera K, Nakanishi K, Minakuchi H

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 23 ( 2 ) page: 185 - 187   2002.2

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  204. Phase separation in alkylene-bridged polysilsesquioxane sol-gel systems Reviewed

    Nakanishi K, Yamato T, Hirao K

    ORGANIC/INORGANIC HYBRID MATERIALS-2002   Vol. 726   page: 291 - 296   2002

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  205. Phase separation in sol-gel process of alkoxide-derived silica-zirconia in the presence of polyethylene oxide Reviewed

    Takahashi R, Sato S, Sodesawa T, Suzuki K, Tafu M, Nakanishi K, Soga N

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 84 ( 9 ) page: 1968 - 1976   2001.9

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  206. Chromatographic characterization of macroporous monolithic silica prepared via sol-gel process Reviewed

    Ishizuka N, Minakuchi H, Nakanishi K, Hirao K, Tanaka N

    COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS   Vol. 187   page: 273 - 279   2001.8

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  207. Monolithic LC columns Reviewed

    Tanaka N, Kobayashi H, Nakanishi K, Minakuchi H, Ishizuka N

    ANALYTICAL CHEMISTRY   Vol. 73 ( 15 ) page: 420A - 429A   2001.8

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  208. About the total performance of monolithic HPLC-columns. Reviewed

    Cabrera K, Minakuchi H, Lubda D, Nakanishi K

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   Vol. 221   page: U100 - U100   2001.4

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  209. Three-dimensional structure of a sintered macroporous silica gel Reviewed

    Jinnai H, Nakanishi K, Nishikawa Y, Yamanaka J, Hashimoto T

    LANGMUIR   Vol. 17 ( 3 ) page: 619 - 625   2001.2

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    DOI: 10.1021/la000949z

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  210. Macroporous morphology of titania films prepared by sol-gel dip-coating method from a system containing poly(ethylene glycol) and poly(vinylpyrrolidone) Reviewed

    Kajihara K, Nakanishi K

    JOURNAL OF MATERIALS RESEARCH   Vol. 16 ( 1 ) page: 58 - 66   2001.1

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  211. Macroporous silicate films by dip-coating Reviewed

    Kumon S, Nakanishi K, Hirao K

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 19 ( 1-3 ) page: 553 - 557   2000.12

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  212. Preparation of silicalite-1 within macroporous silica glass Reviewed

    Shikata H, Nakanishi K, Hirao K

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 19 ( 1-3 ) page: 769 - 773   2000.12

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  213. Preparation and chromatographic application of macroporous silicate in a capillary Reviewed

    Ishizuka N, Nakanishi K, Hirao K, Tanaka N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 19 ( 1-3 ) page: 371 - 375   2000.12

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  214. Porous gels made by phase separation: Recent progress and future directions Reviewed

    Nakanishi K

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 19 ( 1-3 ) page: 65 - 70   2000.12

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  215. Membrane emulsification using sol-gel derived macroporous silica glass Reviewed

    Fuchigami T, Toki M, Nakanishi K

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 19 ( 1-3 ) page: 337 - 341   2000.12

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  216. Performance of a monolithic silica column in a capillary under pressure-driven and electrodriven conditions Reviewed

    Ishizuka N, Minakuchi H, Nakanishi K, Soga N, Nagayama H, Hosoya K, Tanaka N

    ANALYTICAL CHEMISTRY   Vol. 72 ( 6 ) page: 1275 - 1280   2000.3

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  217. Formation of hierarchical pore structure in silica gel Reviewed

    Nakanishi K, Takahashi R, Nagakane T, Kitayama K, Koheiya N, Shikata H, Soga N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 17 ( 3 ) page: 191 - 210   2000.3

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  218. A new monolithic-type HPLC column for fast separations

    Cabrera K, Lubda D, Eggenweiler HM, Minakuchi H, Nakanishi K

    HRC-JOURNAL OF HIGH RESOLUTION CHROMATOGRAPHY   Vol. 23 ( 1 ) page: 93-99   2000.1

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  219. Monolithic silica columns for HPLC, micro-HPLC, and CEC Reviewed

    Tanaka N, Nagayama H, Kobayashi H, Ikegami T, Hosoya K, Ishizuka N, Minakuchi H, Nakanishi K, Cabrera K, Lubda D

    HRC-JOURNAL OF HIGH RESOLUTION CHROMATOGRAPHY   Vol. 23 ( 1 ) page: 111 - 116   2000.1

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  220. Tailoring mesopores in monolithic macroporous silica for HPLC Reviewed

    Nakanishi K, Shikata H, Ishizuka N, Koheiya N, Soga N

    HRC-JOURNAL OF HIGH RESOLUTION CHROMATOGRAPHY   Vol. 23 ( 1 ) page: 106 - 110   2000.1

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  221. Aggregation behavior of alkoxide-derived silica in sol-gel process in presence of poly(ethylene oxide) Reviewed

    Takahashi R, Nakanishi K, Soga N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 17 ( 1 ) page: 7 - 18   2000.1

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  222. Effect of nonionic surfactant on phase separation behavior in methylsiloxane sol-gel systems Reviewed

    Nakanishi K, Miyawaki S, Soga N

    KOBUNSHI RONBUNSHU   Vol. 57 ( 6 ) page: 396 - 401   2000

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  223. Apatite formation on ethylene-vinyl alcohol copolymer modified with silane coupling agent and calcium silicate Reviewed

    Oyane A, Minoda M, Miyamoto T, Nakanishi K, Kawashita M, Kokubo T, Nakamura T

    BIOCERAMICS   Vol. 192-1   page: 713 - 716   2000

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  224. Apatite formation on ethylene-vinyl alcohol copolymer modified with silanol groups Reviewed

    Oyane A, Minoda M, Miyamoto T, Takahashi R, Nakanishi K, Kim HM, Kokubo T, Nakamura T

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH   Vol. 47 ( 3 ) page: 367 - 373   1999.12

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  225. Performance of an octadecylsilylated continuous porous silica column in polypeptide separations Reviewed

    Minakuchi H, Ishizuka N, Nakanishi K, Soga N, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 828 ( 1-2 ) page: 83 - 90   1998.12

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  226. Structural study of mesoporous titania and titanium stearic acid complex prepared from titanium alkoxide Reviewed

    Takahashi R, Takenaka S, Sato S, Sodesawa T, Ogura K, Nakanishi K

    JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS   Vol. 94 ( 20 ) page: 3161 - 3168   1998.10

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  227. Preparation of macroporous titania films by a sol-gel dip-coating method from the system containing poly(ethylene glycol) Reviewed

    Kajihara K, Nakanishi K, Tanaka K, Hirao K, Soga N

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 81 ( 10 ) page: 2670 - 2676   1998.10

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  228. Chromatographic properties of miniaturized silica rod columns Reviewed

    Ishizuka N, Minakuchi H, Nakanishi K, Soga N, Hosoya K, Tanaka N

    HRC-JOURNAL OF HIGH RESOLUTION CHROMATOGRAPHY   Vol. 21 ( 8 ) page: 477 - 479   1998.8

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  229. Morphology control of macroporous silica-zirconia gel based on phase separation Reviewed

    Takahashi R, Nakanishi K, Soga N

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 106 ( 8 ) page: 772 - 777   1998.8

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    DOI: 10.2109/jcersj.106.772

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  230. Apatite formation on silica gel in simulated body fluid: effects of structural modification with solvent-exchange Reviewed

    Cho SB, Miyaji F, Kokubo T, Nakanishi K, Soga N, Nakamura T

    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE   Vol. 9 ( 5 ) page: 279 - 284   1998.5

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  231. Designing double pore structure in alkoxy-derived silica incorporated with nonionic surfactant Reviewed

    Nakanishi K, Nagakane T, Soga N

    JOURNAL OF POROUS MATERIALS   Vol. 5 ( 2 ) page: 103 - 110   1998.5

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  232. Designing monolithic double-pore silica for high-speed liquid chromatography Reviewed

    Ishizuka N, Minakuchi H, Nakanishi K, Soga N, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 797 ( 1-2 ) page: 133 - 137   1998.2

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  233. Effect of domain size on the performance of octadecylsilylated continuous porous silica columns in reversed-phase liquid chromatography Reviewed

    Minakuchi H, Nakanishi K, Soga N, Ishizuka N, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 797 ( 1-2 ) page: 121 - 131   1998.2

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  234. SilicaROD (TM) - A new challenge in fast high-performance liquid chromatography separations Reviewed

    Cabrera K, Wieland G, Lubda D, Nakanishi K, Soga N, Minakuchi H, Unger KK

    TRAC-TRENDS IN ANALYTICAL CHEMISTRY   Vol. 17 ( 1 ) page: 50 - 53   1998.1

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  235. Monolithic HPLC column via sol-gel route Reviewed

    Nakanishi K, Minakuchi H, Ishizuka N, Soga N

    SOL-GEL SYNTHESIS AND PROCESSING   Vol. 95   page: 139 - 150   1998

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  236. Structure design of double-pore silica and its application to HPLC Reviewed

    Nakanishi K, Minakuchi H, Soga N, Tanaka N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 13 ( 1-3 ) page: 163 - 169   1998

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  237. Pore Structure Control of Silica Gels Based on Phase Separation Reviewed

    Nakanishi Kazuki

    JOURNAL OF POROUS MATERIALS   Vol. 4 ( 2 ) page: 67 - 112   1997.6

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  238. Phase separation in silica sol-gel system containing poly(ethylene oxide) .2. Effects of molecular weight and temperature Reviewed

    Nakanishi K, Soga N

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   Vol. 70 ( 3 ) page: 587 - 592   1997.3

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  239. Effect of skeleton size on the performance of octadecylsilylated continuous porous silica columns in reversed-phase liquid chromatography Reviewed

    Minakuchi H, Nakanishi K, Soga N, Ishizuka N, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 762 ( 1-2 ) page: 135 - 146   1997.2

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  240. Double pore silica gel monolith applied to liquid chromatography Reviewed

    Nakanishi K, Minakuchi H, Soga N, Tanaka N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 8 ( 1-3 ) page: 547 - 552   1997

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  241. Phase separation process of polymer-incorporated silica-zirconia sol-gel system Reviewed

    Takahashi R, Nakanishi K, Soga N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 8 ( 1-3 ) page: 71 - 76   1997

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  242. Apatite-forming ability of silicate ion dissolved from silica gels Reviewed

    Cho SB, Miyaji F, Kokubo T, Nakanishi K, Soga N, Nakamura T

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH   Vol. 32 ( 3 ) page: 375 - 381   1996.11

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  243. Octadecylsilylated porous silica rods as separation media for reversed-phase liquid chromatography Reviewed

    Minakuchi H, Nakanishi K, Soga N, Ishizuka N, Tanaka N

    ANALYTICAL CHEMISTRY   Vol. 68 ( 19 ) page: 3498 - 3501   1996.10

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  244. Apatite formation on various silica gels in a simulated body fluid containing excessive calcium ion Reviewed

    Cho SB, Miyaji F, Kokubo T, Nakanishi K, Soga N, Nakamura T

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 104 ( 5 ) page: 399 - 404   1996.5

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    DOI: 10.2109/jcersj.104.399

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  245. Apatite formation on silica gel in simulated body fluid: Its dependence on structures of silica gels prepared in different media Reviewed

    Cho SB, Nakanishi K, Kokubo T, Soga N, Ohtsuki C, Nakamura T

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH   Vol. 33 ( 3 ) page: 145 - 151   1996

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  246. EFFECTS OF AGING AND SOLVENT EXCHANGE ON PORE STRUCTURE OF SILICA-GELS WITH INTERCONNECTED MACROPORES Reviewed

    TAKAHASHI R, NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 189 ( 1-2 ) page: 66 - 76   1995.8

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  247. DEPENDENCE OF APATITE FORMATION ON SILICA-GEL ON ITS STRUCTURE - EFFECT OF HEAT-TREATMENT Reviewed

    CHO SB, NAKANISHI K, KOKUBO T, SOGA N, OHTSUKI C, NAKAMURA T, KITSUGI T, YAMAMURO T

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 78 ( 7 ) page: 1769 - 1774   1995.7

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  248. Formation of porous gel morphology by phase separation in gelling alkoxy-derived silica. Phenomenological study

    Kaji H.

    Journal of Non-Crystalline Solids   Vol. 185 ( 1-2 ) page: 18-30   1995.5

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    DOI: 10.1016/0022-3093(94)00670-9

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  249. FORMATION OF POROUS GEL MORPHOLOGY BY PHASE-SEPARATION IN GELLING ALKOXY-DERIVED SILICA - PHENOMENOLOGICAL STUDY

    KAJI H, NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 185 ( 1-2 ) page: 18-30   1995.5

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  250. Formation of porous gel morphology by phase separation in gelling alkoxy-derived silica. Affinity between silica polymers and solvent.

    Kaji H.

    Journal of Non-Crystalline Solids   Vol. 181 ( 1-2 ) page: 16-26   1995.2

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    DOI: 10.1016/0022-3093(94)00417-L

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  251. FORMATION OF POROUS GEL MORPHOLOGY BY PHASE-SEPARATION IN GELLING ALKOXY-DERIVED SILICA - AFFINITY BETWEEN SILICA POLYMERS AND SOLVENT

    KAJI H, NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 181 ( 1-2 ) page: 16-26   1995.2

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  252. Small-angle X-Ray scattering study of nanopore evolution of macroporous silica gel by solvent exchange Reviewed

    Takahashi R, Nakanishi K, Soga N

    FARADAY DISCUSSIONS   Vol. 101   page: 249 - 263   1995

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  253. PHASE-SEPARATION IN SILICA SOL-GEL SYSTEM CONTAINING POLY(ETHYLENE OXIDE) .1. PHASE RELATION AND GEL MORPHOLOGY Reviewed

    NAKANISHI K, KOMURA H, TAKAHASHI R, SOGA N

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   Vol. 67 ( 5 ) page: 1327 - 1335   1994.5

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  254. In Situ Observation of Phase Separation Processes in Gelling Alkoxy-Derived Silica System by Light Scattering Method Reviewed

    Kaji Hironori, Nakanishi Kazuki, Soga Naohiro, Inoue Tadashi, Nemoto Norio

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 3 ( 3 ) page: 169 - 188   1994.1

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  255. Phase Separation Kinetics in Silica Sol-Gel System Containing Polyethylene Oxide. I. Initial Stage Reviewed

    Nakanishi Kazuki, Yamasaki Yuki, Kaji Hironori, Soga Naohiro, Inoue Tadashi, Nemoto Norio

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 2 ( 1-3 ) page: 227 - 231   1994.1

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  256. THE ROLE OF HYDRATED SILICA, TITANIA, AND ALUMINA IN INDUCING APATITE ON IMPLANTS Reviewed

    LI PJ, OHTSUKI C, KOKUBO T, NAKANISHI K, SOGA N, DEGROOT K

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH   Vol. 28 ( 1 ) page: 7 - 15   1994.1

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  257. Dependence of bone-like apatite formation on structure of silica gel Reviewed

    Kokubo T, Cho SB, Nakanishi K, Soga N, Ohtsuki C, Kitsugi T, Yamamuro T, Nakamura T

    BIOCERAMICS, VOL 7     page: 49 - 54   1994

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  258. INDUCTION AND MORPHOLOGY OF HYDROXYAPATITE, PRECIPITATED FROM METASTABLE SIMULATED BODY-FLUIDS ON SOL-GEL PREPARED SILICA Reviewed

    LI PJ, NAKANISHI K, KOKUBO T, DEGROOT K

    BIOMATERIALS   Vol. 14 ( 13 ) page: 963 - 968   1993.10

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  259. PROCESS OF FORMATION OF BONE-LIKE APATITE LAYER ON SILICA-GEL Reviewed

    LI P, OHTSUKI C, KOKUBO T, NAKANISHI K, SOGA N, NAKAMURA T, YAMAMURO T

    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE   Vol. 4 ( 2 ) page: 127 - 131   1993.3

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  260. Polymerization-Induced Phase Separation in Silica Sol-Gel Systems Containing Formamide Reviewed

    Kaji Hironori, Nakanishi Kazuki, Soga Naohiro

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 1 ( 1 ) page: 35 - 46   1993.1

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  261. MACROPORE STRUCTURE DESIGN OF SOL-GEL DERIVED SILICA BY SPINODAL DECOMPOSITION Reviewed

    NAKANISHI K, KAJI H, SOGA N

    POROUS MATERIALS   Vol. 31   page: 51 - 60   1993

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  262. EFFECTS OF IONS IN AQUEOUS-MEDIA ON HYDROXYAPATITE INDUCTION BY SILICA-GEL AND ITS RELEVANCE TO BIOACTIVITY OF BIOACTIVE GLASSES AND GLASS-CERAMICS Reviewed

    LI P, OHTSUKI C, KOKUBO T, NAKANISHI K, SOGA N, NAKAMURA T, YAMAMURO T

    JOURNAL OF APPLIED BIOMATERIALS   Vol. 4 ( 3 ) page: 221 - 229   1993

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  263. DUAL-POROSITY SILICA-GELS BY POLYMER-INCORPORATED SOL-GEL PROCESS Reviewed

    NAKANISHI K, TAKAHASHI R, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 147   page: 291 - 295   1992.10

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  264. APATITE FORMATION INDUCED BY SILICA-GEL IN A SIMULATED BODY-FLUID Reviewed

    LI PJ, OHTSUKI C, KOKUBO T, NAKANISHI K, SOGA N, NAKAMURA T, YAMAMURO T

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 75 ( 8 ) page: 2094 - 2097   1992.8

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  265. MODIFICATION OF NANOMETER RANGE PORES IN SILICA-GELS WITH INTERCONNECTED MACROPORES BY SOLVENT EXCHANGE Reviewed

    KAJI H, NAKANISHI K, SOGA N, HORII F

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 145 ( 1-3 ) page: 80 - 84   1992.8

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  266. PHASE-SEPARATION IN SILICA SOL-GEL SYSTEM CONTAINING POLYACRYLIC-ACID .3. EFFECT OF CATALYTIC CONDITION Reviewed

    NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 142 ( 1-2 ) page: 36 - 44   1992.4

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  267. PHASE-SEPARATION IN SILICA SOL-GEL SYSTEM CONTAINING POLYACRYLIC-ACID .4. EFFECT OF CHEMICAL ADDITIVES Reviewed

    NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 142 ( 1-2 ) page: 45 - 54   1992.4

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  268. SMALL-ANGLE X-RAY-SCATTERING STUDY OF GELLING SILICA ORGANIC POLYMER-SOLUTION - SYSTEMS CONTAINING POLY(SODIUM STYRENE-SULFONATE) Reviewed

    NAKANISHI K, SOGA N, MATSUOKA H, ISE N

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 75 ( 4 ) page: 971 - 975   1992.4

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  269. PHASE-SEPARATION IN SILICA SOL-GEL SYSTEM CONTAINING POLYACRYLIC-ACID .1. GEL FORMATION BEHAVIOR AND EFFECT OF SOLVENT COMPOSITION Reviewed

    NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 139 ( 1 ) page: 1 - 13   1992.1

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  270. PHASE-SEPARATION IN SILICA SOL-GEL SYSTEM CONTAINING POLYACRYLIC-ACID .2. EFFECTS OF MOLECULAR-WEIGHT AND TEMPERATURE Reviewed

    NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 139 ( 1 ) page: 14 - 24   1992.1

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  271. MACROPORE MORPHOLOGY CONTROL OF SILICA-GEL BY SPINODAL DECOMPOSITION Reviewed

    NAKANISHI K, SOGA N

    CHEMICAL PROCESSING OF ADVANCED MATERIALS     page: 29 - 41   1992

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  272. PHASE-SEPARATION IN GELLING SILICA ORGANIC POLYMER-SOLUTION - SYSTEMS CONTAINING POLY(SODIUM STYRENESULFONATE) Reviewed

    NAKANISHI K, SOGA N

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 74 ( 10 ) page: 2518 - 2530   1991.10

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  273. PORE SURFACE CHARACTERISTICS OF MACROPOROUS SILICA-GELS PREPARED FROM POLYMER-CONTAINING SOLUTION Reviewed

    NAKANISHI K, SAGAWA Y, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 134 ( 1-2 ) page: 39 - 46   1991.9

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  274. SMALL-ANGLE X-RAY-SCATTERING STUDY ON SOL-GEL TRANSITION OF MIXTURES OF COLLOIDAL SILICA AND ORGANIC POLYMER Reviewed

    MATSUOKA H, CHEN S, ISHII H, ISE N, NAKANISHI K, SOGA N

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   Vol. 64 ( 4 ) page: 1283 - 1288   1991

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  275. EFFECT OF STRESS ON WATER CORROSION OF BORATE GLASS Reviewed

    SOGA N, ZHANG ZY, NAKANISHI K, HIRAO K

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 112 ( 1-3 ) page: 377 - 380   1989.10

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  276. CRYSTALLIZATION OF SILICA-GELS CONTAINING SODIUM POLY-4-STYRENE SULFONATE Reviewed

    NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 108 ( 2 ) page: 157 - 162   1989.3

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  277. THE EFFECT OF TWO-DIMENSIONAL COMPRESSIVE STRESS ON THE DISSOLUTION RATE OF GLASS IN WATER Reviewed

    ZHANG Z, NAKANISHI K, HIRAO K, SOGA N

    NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 97 ( 3 ) page: 365 - 369   1989

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  278. ADSORPTION OF ALCOHOL VAPORS ON ALKOXIDE-DERIVED SILICA-GELS Reviewed

    NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 100 ( 1-3 ) page: 399-403   1988.3

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  279. SORPTION OF ALCOHOL VAPORS IN A DISUBSTITUTED POLYACETYLENE Reviewed

    NAKANISHI K, ODANI H, KURATA M, MASUDA T, HIGASHIMURA T

    POLYMER JOURNAL   Vol. 19 ( 2 ) page: 293 - 296   1987

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  280. PERMEATION OF GASES IN POLY[1-(TRIMETHYLSILYL)-1-PROPYNE] Reviewed

    SHIMOMURA H, NAKANISHI K, ODANI H, KURATA M, MASUDA T, HIGASHIMURA T

    KOBUNSHI RONBUNSHU   Vol. 43 ( 11 ) page: 747 - 753   1986

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▼display all

Books 3

  1. Macroporous morphology control by phase separation

    Nakanishi K.( Role: Joint author)

    Handbook of Sol-Gel Science and Technology: Processing, Characterization and Applications  2018.7  ( ISBN:9783319320991

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    Language:Japanese Book type:Scholarly book

    Polymerization-induced phase separation has been utilized to control the macroporous morphology of sol-gel derived materials in a variety of compositions including oxides and phosphates. Monolithic gels with well-defined co-continuous macropores and solid skeletons can be prepared from precursors such as metal alkoxides, organically modified organosilanes, and salts of various metals. The volume and size of macropores can be precisely controlled with sharp distributions by the starting compositions and reaction conditions. Additional tailoring of the micro-mesopores within micrometer-sized gel skeletons is possible either by supramolecular templating or appropriate post-gelation treatments represented by a solvothermal aging. The hierarchically porous monoliths thus obtained can be applied to various liquid-solid contact devices such as separation media for liquid chromatography.

    DOI: 10.1007/978-3-319-32101-1_25

    Scopus

  2. Porosity measurement

    Nakanishi K.( Role: Joint author)

    Handbook of Sol-Gel Science and Technology: Processing, Characterization and Applications  2018.7  ( ISBN:9783319320991

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    Language:Japanese Book type:Scholarly book

    Methods of determining porosity of solid materials are described. Since the spectrum of pore size spreads from sub-nanometers to millimeters, appropriate methods should be adopted to adequately determine the volume and size of the pores contained in the solid materials. Representative methods including liquid intrusion and gas adsorption are concisely explained assuming the samples are obtained via sol-gel routes. Recent direct method of determining the three-dimensional configurations of pores and solid parts will also be introduced.

    DOI: 10.1007/978-3-319-32101-1_38

    Scopus

  3. Monolithic porous silica for high-speed HPLC

    Nakanishi K.( Role: Joint author)

    Handbook of Sol-Gel Science and Technology: Processing, Characterization and Applications  2018.7  ( ISBN:9783319320991

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    Language:Japanese Book type:Scholarly book

    As one of the successful applications of hierarchically porous monolithic silica, HPLC column without particle-packed structure is briefly introduced. With a progress of manufacturing technology over 20 years of development, highly efficient column structure can be fabricated in various column thickness; besides the traditional analytical column dimension of 4.6 mmID, semi-micro (1-2 mmID) and capillary (<0.5 mmID) formats are now available. Especially in the capillary format, elongated columns can separate very complex biochemical mixtures coupled with mass spectrometric detectors.

    DOI: 10.1007/978-3-319-32101-1_54

    Scopus

MISC 199

  1. Sol-gel preparation of hierarchically porous magnesium aluminate (MgAl2O4) spinel monoliths for dye adsorption

    Guo Xingzhong, Yin Pengan, Kanamori Kazuyoshi, Nakanishi Kazuki, Yang Hui

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 88 ( 1 ) page: 114-128   2018.10

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)  

    DOI: 10.1007/s10971-018-4781-0

    Web of Science

  2. On-line Redox Derivatization Liquid Chromatography Using a Carbon Monolithic Column

    Miyashita Ken, Tanaka Ryo, Hasegawa George, Nakanishi Kazuki, Morioka Kazuhiro, Zeng Hulie, Kato Shungo, Uchiyama Katsumi, Saitoh Kazunori, Shibukawa Masami, Nakajima Hizuru

    BUNSEKI KAGAKU   Vol. 67 ( 8 ) page: 469-478   2018.8

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  3. Superflexible Multifunctional Polyvinylpolydimethylsiloxane-Based Aerogels as Efficient Absorbents, Thermal Superinsulators, and Strain Sensors

    Zu Guoqing, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   Vol. 57 ( 31 ) page: 9722-9727   2018.7

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    DOI: 10.1002/anie.201804559

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  4. Synthesis of a hierarchically porous niobium phosphate monolith by a sol-gel method for fructose dehydration to 5-hydroxymethylfurfural

    Gao Da-Ming, Zhao Bohan, Liu Haichao, Morisato Kei, Kanamori Kazuyoshi, He Zhiyong, Zeng Maomao, Wu Huaping, Chen Jie, Nakanishi Kazuki

    CATALYSIS SCIENCE & TECHNOLOGY   Vol. 8 ( 14 ) page: 3675-3685   2018.7

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    DOI: 10.1039/c8cy00803e

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  5. Comprehensive studies on phosphoric acid treatment of porous titania toward titanium phosphate and pyrophosphate monoliths with pore hierarchy and a nanostructured pore surface

    Zhu Yang, Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki

    INORGANIC CHEMISTRY FRONTIERS   Vol. 5 ( 6 ) page: 1397-1404   2018.6

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    DOI: 10.1039/c8qi00146d

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  6. Iron(III) oxyhydroxide and oxide monoliths with controlled multiscale porosity: synthesis and their adsorption performance

    Hara Yosuke, Kanamori Kazuyoshi, Morisato Kei, Miyamoto Riichi, Nakanishi Kazuki

    JOURNAL OF MATERIALS CHEMISTRY A   Vol. 6 ( 19 ) page: 9041-9048   2018.5

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    DOI: 10.1039/c8ta01691g

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  7. Application of a Novel Anti-Adhesive Membrane, E8002, in a Rat Laminectomy Model Reviewed

    Kikuchi Kiyoshi, Setoyama Kentaro, Terashi Takuto, Sumizono Megumi, Tancharoen Salunya, Otsuka Shotaro, Takada Seiya, Nakanishi Kazuki, Ueda Koki, Sakakima Harutoshi, Kawahara Ko-ichi, Maruyama Ikuro, Hattori Gohsuke, Morioka Motohiro, Tanaka Eiichiro, Uchikado Hisaaki

    INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES   Vol. 19 ( 5 )   2018.5

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    DOI: 10.3390/ijms19051513

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  8. Versatile Double-Cross-Linking Approach to Transparent, Machinable, Supercompressible, Highly Bendable Aerogel Thermal Superinsulators

    Zu Guoqing, Kanamori Kazuyoshi, Shimizu Taiyo, Zhu Yang, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki, Shen Jun

    CHEMISTRY OF MATERIALS   Vol. 30 ( 8 ) page: 2759-2770   2018.4

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  9. Transparent, Superflexible Doubly Cross-Linked Polyvinylpolymethylsiloxane Aerogel Superinsulators via Ambient Pressure Drying Reviewed

    Zu Guoqing, Shimizu Taiyo, Kanamori Kazuyoshi, Zhu Yang, Maeno Ayaka, Kaji Hironori, Shen Jun, Nakanishi Kazuki

    ACS NANO   Vol. 12 ( 1 ) page: 521-532   2018.1

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    DOI: 10.1021/acsnano.7b07117

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  10. Synthesis and characterization of monolithic ZnAl2O4 spinel with well-defined hierarchical pore structures via a sol-gel route Reviewed

    Guo Xingzhong, Yin Pengan, Lei Wei, Yang Hui, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF ALLOYS AND COMPOUNDS   Vol. 727   page: 763-770   2017.12

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  11. Polymer-assisted shapeable synthesis of porous frameworks consisting of silica nanoparticles with mechanical property tuning Reviewed

    Sato Kanako, Ishii Kanji, Oaki Yuya, Nakanishi Kazuki, Imai Hiroaki

    POLYMER JOURNAL   Vol. 49 ( 12 ) page: 825-830   2017.12

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    DOI: 10.1038/pj.2017.62

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  12. Synthesis, Reduction, and Electrical Properties of Macroporous Monolithic Mayenite Electrides with High Porosity Reviewed

    Wang Rui, Yang Hui, Lu Yunhao, Kanamori Kazuyoshi, Nakanishi Kazuki, Guo Xingzhong

    ACS OMEGA   Vol. 2 ( 11 ) page: 8148-8155   2017.11

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    DOI: 10.1021/acsomega.7b01121

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  13. Ultralow-Density, Transparent, Superamphiphobic Boehmite Nanofiber Aerogels and Their Alumina Derivatives (vol 27, pg 3, 2015) Reviewed

    Hayase Gen D, Nonomura Kazuya, Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki

    CHEMISTRY OF MATERIALS   Vol. 29 ( 12 ) page: 5413-5413   2017.6

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  14. Fabrication of hydrophobic polymethylsilsesquioxane aerogels by a surfactant-free method using alkoxysilane with ionic group Reviewed

    Hayase Gen, Nagayama Shuya, Nonomura Kazuya, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    JOURNAL OF ASIAN CERAMIC SOCIETIES   Vol. 5 ( 2 ) page: 104-108   2017.6

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  15. Functionalization of hierarchically porous silica monoliths with polyethyleneimine (PEI) for CO2 adsorption Reviewed

    Guo Xingzhong, Ding Li, Kanamori Kazuyoshi, Nakanishi Kazuki, Yang Hui

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 245   page: 51-57   2017.6

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  16. Transparent Ethenylene-Bridged Polymethylsiloxane Aerogels: Mechanical Flexibility and Strength and Availability for Addition Reaction Reviewed

    Shimizu Taiyo, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Doherty Cara M., Nakanishi Kazuki

    LANGMUIR   Vol. 33 ( 18 ) page: 4543-4550   2017.5

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  17. Silicone-Based Organic-Inorganic Hybrid Aerogels and Xerogels Reviewed

    Shimizu Taiyo, Kanamori Kazuyoshi, Nakanishi Kazuki

    CHEMISTRY-A EUROPEAN JOURNAL   Vol. 23 ( 22 ) page: 5176-5187   2017.4

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    DOI: 10.1002/chem.201603680

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  18. Transparent polyvinylsilsesquioxane aerogels: investigations on synthetic parameters and surface modification Reviewed

    Shimizu Taiyo, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 82 ( 1 ) page: 2-14   2017.4

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  19. Highly Flexible Hybrid Polymer Aerogels and Xerogels Based on Resorcinol-Formaldehyde with Enhanced Elastic Stiffness and Recoverability: Insights into the Origin of Their Mechanical Properties Reviewed

    Hasegawa George, Shimizu Taiyo, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    CHEMISTRY OF MATERIALS   Vol. 29 ( 5 ) page: 2122-2134   2017.3

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  20. Grafted Polymethylhydrosiloxane on Hierarchically Porous Silica Monoliths: A New Path to Monolith-Supported Palladium Nanoparticles for Continuous Flow Catalysis Applications Reviewed

    Pelisson Carl-Hugo, Nakanishi Takahiro, Zhu Yang, Morisato Kei, Kamei Toshiyuki, Maeno Ayaka, Kaji Hironori, Muroyama Shunki, Tafu Masamoto, Kanamori Kazuyoshi, Shimada Toyoshi, Nakanishi Kazuki

    ACS APPLIED MATERIALS & INTERFACES   Vol. 9 ( 1 ) page: 406-412   2017.1

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    DOI: 10.1021/acsami.6b12653

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  21. Low-density, transparent aerogels and xerogels based on hexylene-bridged polysilsesquioxane with bendability Reviewed

    Aoki Yosuke, Shimizu Taiyo, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 81 ( 1 ) page: 42-51   2017.1

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  22. Edaravone, a Synthetic Free Radical Scavenger, Enhances Alteplase-Mediated Thrombiolysis Reviewed

    Kikuchi Kiyoshi, Setoyama Kentaro, Kawahara Ko-ichi, Nagasato Tomoka, Terashi Takuto, Ueda Koki, Nakanishi Kazuki, Otsuka Shotaro, Miura Naoki, Sameshima Hisayo, Hosokawa Kazuya, Harada Yoichiro, Shrestha Binita, Yamamoto Mika, Morimoto-Yamashita Yoko, Kikuchi Haruna, Kiyama Ryoji, Kamikokuryo Chinatsu, Tancharoen Salunya, Sakakima Harutoshi, Morioka Motohiro, Tanaka Eiichiro, Ito Takashi, Maruyama Ikuro

    OXIDATIVE MEDICINE AND CELLULAR LONGEVITY   Vol. 2017   2017

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    DOI: 10.1155/2017/6873281

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  23. Highly Efficient Encapsulation of Ingredients in Poly(methyl methacrylate) Capsules Using a Superoleophobic Material Reviewed

    Takei Takayuki, Araki Kiyotaka, Terazono Keita, Ozuno Yoshihiro, Hayase Gen, Kanamori Kazuyoshi, Nakanishi Kazuki, Yoshida Masahiro

    POLYMERS & POLYMER COMPOSITES   Vol. 25 ( 2 ) page: 129-134   2017

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  24. Effects of nanostructured biosilica on rice plant mechanics Reviewed

    Sato Kanako, Ozaki Noriaki, Nakanishi Kazuki, Sugahara Yoshiyuki, Oaki Yuya, Salinas Christopher, Herrera Steven, Kisailus David, Imai Hiroaki

    RSC ADVANCES   Vol. 7 ( 22 ) page: 13065-13071   2017

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    DOI: 10.1039/c6ra27317c

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  25. Transparent Ethylene-Bridged Polymethylsiloxane Aerogels and Xerogels with Improved Bending Flexibility Reviewed

    Shimizu Taiyo, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    LANGMUIR   Vol. 32 ( 50 ) page: 13427-13434   2016.12

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  26. Monolithic acidic catalysts for the dehydration of xylose into furfural

    Zhu Yang, Kanamori Kazuyoshi, Brun Nicolas, Pelisson Carl-Hugo, Moitra Nirmalya, Fajula Francois, Hulea Vasile, Galarneau Anne, Takeda Kazuyuki, Nakanishi Kazuki

    CATALYSIS COMMUNICATIONS   Vol. 87   page: 112-115   2016.12

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  27. Transparent, Highly Insulating Polyethyl- and Polyvinylsilsesquioxane Aerogels: Mechanical Improvements by Vulcanization for Ambient Pressure Drying

    Shimizu Taiyo, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Doherty Cara M., Falcaro Paolo, Nakanishi Kazuki

    CHEMISTRY OF MATERIALS   Vol. 28 ( 19 ) page: 6860-6868   2016.10

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  28. The XVIII International Sol-Gel Conference: Sol-Gel 2015 was held in Kyoto, Japan, September 6-11, 2015

    Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 79 ( 2 ) page: 241-241   2016.8

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  29. Facile preparation of well-defined macroporous yttria-stabilized zirconia monoliths via sol-gel process accompanied by phase separation

    Guo Xingzhong, Song Jie, Ren Jing, Yang Fanger, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF POROUS MATERIALS   Vol. 23 ( 4 ) page: 867-875   2016.8

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  30. Studies on electrochemical sodium storage into hard carbons with binder-free monolithic electrodes

    Hasegawa George, Kanamori Kazuyoshi, Kannari Naokatsu, Ozaki Jun-ichi, Nakanishi Kazuki, Abe Takeshi

    JOURNAL OF POWER SOURCES   Vol. 318   page: 41-48   2016.6

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  31. Hierarchically Porous Carbon Monoliths Comprising Ordered Mesoporous Nanorod Assemblies for High-Voltage Aqueous Supercapacitors

    Hasegawa George, Kanamori Kazuyoshi, Kiyomura Tsutomu, Kurata Hiroki, Abe Takeshi, Nakanishi Kazuki

    CHEMISTRY OF MATERIALS   Vol. 28 ( 11 ) page: 3944-3950   2016.6

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  32. Boehmite Nanofiber-Polymethylsilsesquioxane Core-Shell Porous Monoliths for a Thermal Insulator under Low Vacuum Conditions

    Hayase Gen, Nonomura Kazuya, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    CHEMISTRY OF MATERIALS   Vol. 28 ( 10 ) page: 3237-3240   2016.5

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  33. Metal zirconium phosphate macroporous monoliths: Versatile synthesis, thermal expansion and mechanical properties

    Zhu Yang, Kanamori Kazuyoshi, Moitra Nirmalya, Kadono Kohei, Ohi Shugo, Shimobayashi Norimasa, Nakanishi Kazuki

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 225   page: 122-127   2016.5

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  34. Dynamic spring-back behavior in evaporative drying of polymethylsilsesquioxane monolithic gels for low-density transparent thermal superinsulators Reviewed

    Hayase Gen, Kanamori Kazuyoshi, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 434   page: 115-119   2016.2

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  35. Encapsulation of hydrophobic ingredients in hard resin capsules with ultrahigh efficiency using a superoleophobic material

    Takei Takayuki, Terazono Keita, Araki Kiyotaka, Ozuno Yoshihiro, Hayase Gen, Kanamori Kazuyoshi, Nakanishi Kazuki, Yoshida Masahiro

    POLYMER BULLETIN   Vol. 73 ( 2 ) page: 409-417   2016.2

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  36. The chromatographic performance of flow-through particles: A computational fluid dynamics study Reviewed

    Smits Wim, Nakanishi Kazuki, Desmet Gert

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1429   page: 166-174   2016.1

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  37. Hierarchically porous titanium phosphate monoliths and their crystallization behavior in ethylene glycol

    Zhu Yang, Yoneda Koji, Kanamori Kazuyoshi, Takeda Kazuyuki, Kiyomura Tsutomu, Kurata Hiroki, Nakanishi Kazuki

    NEW JOURNAL OF CHEMISTRY   Vol. 40 ( 5 ) page: 4153-4159   2016

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    Language:English  

    DOI: 10.1039/c5nj02820e

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  38. Hard Carbon Anodes for Na-Ion Batteries: Toward a Practical Use Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Kannari Naokatsu, Ozaki Jun-ichi, Nakanishi Kazuki, Abe Takeshi

    CHEMELECTROCHEM   Vol. 2 ( 12 ) page: 1917-1920   2015.12

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    DOI: 10.1002/celc.201500412

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  39. Synthesis of hierarchically porous polymethylsilsesquioxane monoliths with controlled mesopores for HPLC separation Reviewed

    Zhu Yang, Morimoto Yoshie, Shimizu Taiyo, Morisato Kei, Takeda Kazuyuki, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 123 ( 1441 ) page: 770-778   2015.9

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  40. Novel soft touch silicone beads from methyltrimethoxysilane and dimethyldimethoxysilane using easy aqueous solution reaction Reviewed

    Tsuchiya Reiichiro, Tanaka Takumi, Hayase Gen, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 123 ( 1441 ) page: 714-718   2015.9

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    DOI: 10.2109/jcersj2.123.714

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  41. High-performance liquid chromatography separation of unsaturated organic compounds by a monolithic silica column embedded with silver nanoparticles Reviewed

    Zhu Yang, Morisato Kei, Hasegawa George, Moitra Nirmalya, Kiyomura Tsutomu, Kurata Hiroki, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF SEPARATION SCIENCE   Vol. 38 ( 16 ) page: 2841-2847   2015.8

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    DOI: 10.1002/jssc.201500444

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  42. High-Level Doping of Nitrogen, Phosphorus, and Sulfur into Activated Carbon Monoliths and Their Electrochemical Capacitances Reviewed

    Hasegawa George, Deguchi Takeru, Kanamori Kazuyoshi, Kobayashi Yoji, Kageyama Hiroshi, Abe Takeshi, Nakanishi Kazuki

    CHEMISTRY OF MATERIALS   Vol. 27 ( 13 ) page: 4703-4712   2015.7

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  43. Effect of Calcination Conditions on Porous Reduced Titanium Oxides and Oxynitrides via a Preceramic Polymer Route (vol 54, pg 2802, 2015) Reviewed

    Hasegawa George, Sato Tatsuya, Kanamori Kazuyoshi, Sun Cheng-Jun, Ren Yang, Kobayashi Yoji, Kageyama Hiroshi, Abe Takeshi, Nakanishi Kazuki

    INORGANIC CHEMISTRY   Vol. 54 ( 11 ) page: 5614-5614   2015.6

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  44. Preparation of macroporous zirconia monoliths from ionic precursors via an epoxide-mediated sol-gel process accompanied by phase separation Reviewed

    Guo Xingzhong, Song Jie, Lvlin Yixiu, Nakanishi Kazuki, Kanamori Kazuyoshi, Yang Hui

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS   Vol. 16 ( 2 )   2015.4

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  45. Effect of Calcination Conditions on Porous Reduced Titanium Oxides and Oxynitrides via a Preceramic Polymer Route Reviewed

    Hasegawa George, Sato Tatsuya, Kanamori Kazuyoshi, Sun Cheng-Jun, Ren Yang, Kobayashi Yoji, Kageyama Hiroshi, Abe Takeshi, Nakanishi Kazuki

    INORGANIC CHEMISTRY   Vol. 54 ( 6 ) page: 2802-2808   2015.3

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    DOI: 10.1021/ic502972v

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  46. Efficiency of short, small-diameter columns for reversed-phase liquid chromatography under practical operating conditions

    Ma Yan, Chassy Alexander W., Miyazaki Shota, Motokawa Masanori, Morisato Kei, Uzu Hideyuki, Ohira Masayoshi, Furuno Masahiro, Nakanishi Kazuki, Minakuchi Hiroyoshi, Mriziq Khaled, Farkas Tivadar, Fiehn Oliver, Tanaka Nobuo

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1383   page: 47-57   2015.2

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  47. Ultralow-Density, Transparent, Superamphiphobic Boehmite Nanofiber Aerogels and Their Alumina Derivatives Reviewed

    Hayase Gen, Nonomura Kazuya, Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki

    CHEMISTRY OF MATERIALS   Vol. 27 ( 1 ) page: 3-5   2015.1

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    DOI: 10.1021/cm503993n

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  48. Hierarchically Porous Li4Ti5O12 Anode Materials for Li- and Na-Ion Batteries: Effects of Nanoarchitectural Design and Temperature Dependence of the Rate Capability Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Kiyomura Tsutomu, Kurata Hiroki, Nakanishi Kazuki, Abe Takeshi

    ADVANCED ENERGY MATERIALS   Vol. 5 ( 1 )   2015.1

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    DOI: 10.1002/aenm.201400730

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  49. Mesoscopic superstructures of flexible porous coordination polymers synthesized via coordination replication Reviewed

    Sumida Kenji, Moitra Nirmalya, Reboul Julien, Fukumoto Shotaro, Nakanishi Kazuki, Kanamori Kazuyoshi, Furukawa Shuhei, Kitagawa Susumu

    CHEMICAL SCIENCE   Vol. 6 ( 10 ) page: 5938-5946   2015

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    DOI: 10.1039/c5sc02034d

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  50. Impact of Electrolyte on Pseudocapacitance and Stability of Porous Titanium Nitride (TiN) Monolithic Electrode Reviewed

    Hasegawa George, Kitada Atsushi, Kawasaki Shota, Kanamori Kazuyoshi, Nakanishi Kazuki, Kobayashi Yoji, Kageyama Hiroshi, Abe Takeshi

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY   Vol. 162 ( 1 ) page: A77-A85   2015

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    DOI: 10.1149/2.0491501jes

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  51. Mechanically stable, hierarchically porous Cu-3(btc)(2) (HKUST-1) monoliths via direct conversion of copper(II) hydroxide-based monoliths Reviewed

    Moitra Nirmalya, Fukumoto Shotaro, Reboul Julien, Sumida Kenji, Zhu Yang, Nakanishi Kazuki, Furukawa Shuhei, Kitagawa Susumu, Kanamori Kazuyoshi

    CHEMICAL COMMUNICATIONS   Vol. 51 ( 17 ) page: 3511-3514   2015

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    DOI: 10.1039/c4cc09694k

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  52. Sol-gel synthesis of nanocrystal-constructed hierarchically porous TiO2 based composites for lithium ion batteries Reviewed

    Zhu Wenjun, Yang Hui, Nakanishi Kazuki, Kanamori Kazuyoshi, Guo Xingzhong

    RSC ADVANCES   Vol. 5 ( 31 ) page: 24803-24813   2015

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    DOI: 10.1039/c5ra03491d

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  53. Synthesis of robust hierarchically porous zirconium phosphate monolith for efficient ion adsorption Reviewed

    Zhu Yang, Shimizu Taiyo, Kitajima Takara, Morisato Kei, Moitra Nirmalya, Brun Nicolas, Kiyomura Tsutomu, Kanamori Kazuyoshi, Takeda Kazuyuki, Kurata Hiroki, Tafu Masamoto, Nakanishi Kazuki

    NEW JOURNAL OF CHEMISTRY   Vol. 39 ( 4 ) page: 2444-2450   2015

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    DOI: 10.1039/c4nj01749h

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  54. Fabrication of hierarchically porous monolithic layered double hydroxide composites with tunable microcages for effective oxyanion adsorption Reviewed

    Tarutani Naoki, Tokudome Yasuaki, Fukui Megu, Nakanishi Kazuki, Takahashi Masahide

    RSC ADVANCES   Vol. 5 ( 70 ) page: 57187-57192   2015

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    DOI: 10.1039/c5ra05942a

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  55. Spontaneous preparation of hierarchically porous silica monoliths with uniform spherical mesopores confined in a well-defined macroporous framework Reviewed

    Guo Xingzhong, Wang Rui, Yu Huan, Zhu Yang, Nakanishi Kazuki, Kanamori Kazuyoshi, Yang Hui

    DALTON TRANSACTIONS   Vol. 44 ( 30 ) page: 13592-13601   2015

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    DOI: 10.1039/c5dt01672j

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  56. Preparation of silver nanoparticles embedded hierarchically porous AlPO4 monoliths Reviewed

    Cai Xiaobo, Zhu Wenjun, Yang Hui, Xu Chenyang, Nakanishi Kazuki, Kanamori Kazuyoshi, Guo Xingzhong

    NEW JOURNAL OF CHEMISTRY   Vol. 39 ( 8 ) page: 6238-6243   2015

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    DOI: 10.1039/c5nj00490j

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  57. Direct preparation and conversion of copper hydroxide-based monolithic xerogels with hierarchical pores Reviewed

    Fukumoto Shotaro, Nakanishi Kazuki, Kanamori Kazuyoshi

    NEW JOURNAL OF CHEMISTRY   Vol. 39 ( 9 ) page: 6771-6777   2015

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    DOI: 10.1039/c5nj00479a

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  58. Facile preparation of silver nanoparticles homogeneously immobilized in hierarchically monolithic silica using ethylene glycol as reductant Reviewed

    Yu Huan, Zhu Yang, Yang Hui, Nakanishi Kazuki, Kanamori Kazuyoshi, Guo Xingzhong

    DALTON TRANSACTIONS   Vol. 43 ( 33 ) page: 12648-12656   2014.9

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    DOI: 10.1039/C4DT00655K

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  59. Surface Functionalization of Silica by Si-H Activation of Hydrosilanes Reviewed

    Moitra Nirmalya, Ichii Shun, Kamei Toshiyuki, Kanamori Kazuyoshi, Zhu Yang, Takeda Kazuyuki, Nakanishi Kazuki, Shimada Toyoshi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   Vol. 136 ( 33 ) page: 11570-11573   2014.8

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    DOI: 10.1021/ja504115d

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  60. Experimental and numerical validation of the effective medium theory for the B-term band broadening in 1st and 2nd generation monolithic silica columns Reviewed

    Deridder Sander, Vanmessen Alison, Nakanishi Kazuki, Desmet Gert, Cabooter Deirdre

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1351   page: 46-55   2014.7

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  61. Polymethylsilsesquioxane-Cellulose Nanofiber Biocomposite Aerogels with High Thermal Insulation, Bendability, and Superhydrophobicity Reviewed

    Hayase Gen, Kanamori Kazuyoshi, Abe Kentaro, Yano Hiroyuki, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    ACS APPLIED MATERIALS & INTERFACES   Vol. 6 ( 12 ) page: 9466-9471   2014.6

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    DOI: 10.1021/am501822y

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  62. Fabrication of nitrogen-doped TiO2 monolith with well-defined macroporous and bicrystalline framework and its photocatalytic performance under visible light Reviewed

    Ruzimuradov Olim, Nurmanov Suvankul, Hojamberdiev Mirabbos, Prasad Ravi Mohan, Gurlo Aleksander, Broetz Joachim, Nakanishi Kazuki, Riedel Ralf

    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY   Vol. 34 ( 3 ) page: 809-816   2014.3

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  63. Preparation of macroporous cordierite monoliths via the sol-gel process accompanied by phase separation Reviewed

    Guo Xingzhong, Nakanishi Kazuki, Kanamori Kazuyoshi, Zhu Yang, Yang Hui

    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY   Vol. 34 ( 3 ) page: 817-823   2014.3

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  64. Preparation and characterization of macroporous TiO2-SrTiO3 heterostructured monolithic photocatalyst Reviewed

    Ruzimuradov Ohm, Nurmanov Suvankul, Hojamberdiev Mirabbos, Prasad Ravi Mohan, Gurlo Alexander, Broetz Joachim, Nakanishi Kazuki, Riedel Ralf

    MATERIALS LETTERS   Vol. 116   page: 353-355   2014.2

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  65. Detailed characterization of the kinetic performance of first and second generation silica monolithic columns for reversed-phase chromatography separations Reviewed

    Cabooter Deirdre, Broeckhoven Ken, Sterken Roman, Vanmessen Alison, Vandendael Isabelle, Nakanishi Kazuki, Deridder Sander, Desmet Gert

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1325   page: 72-82   2014.1

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  66. Reduction on reactive pore surfaces as a versatile approach to synthesize monolith-supported metal alloy nanoparticles and their catalytic applications Reviewed

    Moitra Nirmalya, Kanamori Kazuyoshi, Ikuhara Yumi H., Gao Xiang, Zhu Yang, Hasegawa George, Takeda Kazuyuki, Shimada Toyoshi, Nakanishi Kazuki

    JOURNAL OF MATERIALS CHEMISTRY A   Vol. 2 ( 31 ) page: 12535-12544   2014

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    DOI: 10.1039/c4ta01767f

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  67. Layered double hydroxide composite monoliths with three-dimensional hierarchical channels: structural control and adsorption behavior Reviewed

    Tarutani Naoki, Tokudome Yasuaki, Nakanishi Kazuki, Takahashi Masahide

    RSC ADVANCES   Vol. 4 ( 31 ) page: 16075-16080   2014

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    DOI: 10.1039/c4ra00873a

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  68. Porous chromium-based ceramic monoliths: oxides (Cr2O3), nitrides (CrN), and carbides (Cr3C2) Reviewed

    Kido Yasuki, Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF MATERIALS CHEMISTRY A   Vol. 2 ( 3 ) page: 745-752   2014

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    DOI: 10.1039/c3ta13725b

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  69. A new hierarchically porous Pd@HSQ monolithic catalyst for Mizoroki-Heck cross-coupling reactions Reviewed

    Moitra Nirmalya, Matsushima Ayumi, Kamei Toshiyuki, Kanamori Kazuyoshi, Ikuhara Yumi H., Gao Xiang, Takeda Kazuyuki, Zhu Yang, Nakanishi Kazuki, Shimada Toyoshi

    NEW JOURNAL OF CHEMISTRY   Vol. 38 ( 3 ) page: 1144-1149   2014

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    DOI: 10.1039/c3nj01433a

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  70. Synthesis and electrochemical performance of hierarchically porous N-doped TiO2 for Li-ion batteries Reviewed

    Hasegawa George, Sato Tatsuya, Kanamori Kazuyoshi, Nakanishi Kazuki, Abe Takeshi

    NEW JOURNAL OF CHEMISTRY   Vol. 38 ( 4 ) page: 1380-1384   2014

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    DOI: 10.1039/c3nj01332d

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  71. Pore structure control of macroporous methylsilsesquioxane monoliths prepared by in situ two-step processing Reviewed

    Guo Xingzhong, Yu Huan, Yang Hui, Kanamori Kazuyoshi, Zhu Yang, Nakanishi Kazuki

    JOURNAL OF POROUS MATERIALS   Vol. 20 ( 6 ) page: 1477-1483   2013.12

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  72. A Superamphiphobic Macroporous Silicone Monolith with Marshmallow-like Flexibility Reviewed

    Hayase Gen, Kanamori Kazuyoshi, Hasegawa George, Maeno Ayaka, Kaji Hironori, Nakanishi Kazuki

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   Vol. 52 ( 41 ) page: 10788-10791   2013.10

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    DOI: 10.1002/anie.201304169

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  73. Recyclable Functionalization of Silica with Alcohols via Dehydrogenative Addition on Hydrogen Silsesquioxane Reviewed

    Moitra Nirmalya, Kamei Toshiyuki, Kanamori Kazuyoshi, Nakanishi Kazuki, Takeda Kazuyuki, Shimada Toyoshi

    LANGMUIR   Vol. 29 ( 39 ) page: 12243-12253   2013.10

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    DOI: 10.1021/la402205j

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  74. Hierarchically Porous Monoliths Based on N-Doped Reduced Titanium Oxides and Their Electric and Electrochemical Properties Reviewed

    Hasegawa George, Sato Tatsuya, Kanamori Kazuyoshi, Nakano Kousuke, Yajima Takeshi, Kobayashi Yoji, Kageyama Hiroshi, Abe Takeshi, Nakanishi Kazuki

    CHEMISTRY OF MATERIALS   Vol. 25 ( 17 ) page: 3504-3512   2013.9

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    DOI: 10.1021/cm401933a

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  75. Sol-gel synthesis of macroporous TiO2 from ionic precursors via phase separation route Reviewed

    Li Wenyan, Guo Xingzhong, Zhu Yang, Hui Yang, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 67 ( 3 ) page: 639-645   2013.9

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  76. Preparation of mullite monoliths with well-defined macropores and mesostructured skeletons via the sol-gel process accompanied by phase separation Reviewed

    Guo Xingzhong, Li Wenyan, Nakanishi Kazuki, Kanamori Kazuyoshi, Zhu Yang, Yang Hui

    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY   Vol. 33 ( 10 ) page: 1967-1974   2013.9

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  77. Preparation of a hierarchically porous AlPO4 monolith via an epoxide-mediated sol-gel process accompanied by phase separation Reviewed

    Li Wenyan, Zhu Yang, Guo Xingzhong, Nakanishi Kazuki, Kanamori Kazuyoshi, Yang Hui

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS   Vol. 14 ( 4 )   2013.8

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  78. Hierarchically porous nickel/carbon composite monoliths prepared by sol-gel method from an ionic precursor Reviewed

    Kido Yasuki, Nakanishi Kazuki, Okumura Nao, Kanamori Kazuyoshi

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 176   page: 64-70   2013.8

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  79. Synthesis of Hierarchically Porous Hydrogen Silsesquioxane Monoliths and Embedding of Metal Nanoparticles by On-Site Reduction Reviewed

    Moitra Nirmalya, Kanamori Kazuyoshi, Shimada Toyoshi, Takeda Kazuyuki, Ikuhara Yumi H., Gao Xiang, Nakanishi Kazuki

    ADVANCED FUNCTIONAL MATERIALS   Vol. 23 ( 21 ) page: 2714-2722   2013.6

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    DOI: 10.1002/adfm.201202558

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  80. Fabrication of large-sized silica monolith exceeding 1000 mL with high structural homogeneity Reviewed

    Miyamoto Riichi, Ando Yukiko, Kurusu Chie, Bai Hong-zhi, Nakanishi Kazuki, Ippommatsu Masamichi

    JOURNAL OF SEPARATION SCIENCE   Vol. 36 ( 12 ) page: 1890-1896   2013.6

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    DOI: 10.1002/jssc.201300123

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  81. Synthesis of Silver Nanoparticles Confined in Hierarchically Porous Monolithic Silica: A New Function in Aromatic Hydrocarbon Separations Reviewed

    Zhu Yang, Morisato Kei, Li Wenyan, Kanamori Kazuyoshi, Nakanishi Kazuki

    ACS APPLIED MATERIALS & INTERFACES   Vol. 5 ( 6 ) page: 2118-2125   2013.3

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    DOI: 10.1021/am303163s

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  82. Macroporous SiO2 Monoliths Prepared via Sol-Gel Process Accompanied by Phase Separation Reviewed

    Guo Xing-Zhong, Li Wen-Yan, Zhu Yang, Nakanishi Kazuki, Kanamori Kazuyoshi, Yang Hui

    ACTA PHYSICO-CHIMICA SINICA   Vol. 29 ( 3 ) page: 646-652   2013.3

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  83. Hierarchically Porous Monoliths of Oxygen-deficient Anatase TiO2-x with Electronic Conductivity (vol 3, pg 7205, 2013) Reviewed

    Kitada Atsushi, Hasegawa George, Kobayashi Yoji, Miyazaki Kohei, Abe Takeshi, Kanamori Kazuyoshi, Nakanishi Kazuki, Kageyama Hiroshi

    RSC ADVANCES   Vol. 3 ( 48 ) page: 26475-26475   2013

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  84. Facile Synthesis of Marshmallow-like Macroporous Gels Usable under Harsh Conditions for the Separation of Oil and Water Reviewed

    Hayase Gen, Kanamori Kazuyoshi, Fukuchi Masashi, Kaji Hironori, Nakanishi Kazuki

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   Vol. 52 ( 7 ) page: 1986-1989   2013

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    DOI: 10.1002/anie.201207969

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  85. Sol-gel synthesis of zinc ferrite-based xerogel monoliths with well-defined macropores Reviewed

    Kido Yasuki, Nakanishi Kazuki, Kanamori Kazuyoshi

    RSC ADVANCES   Vol. 3 ( 11 ) page: 3661-3666   2013

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    DOI: 10.1039/c3ra22481c

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  86. New Li2FeSiO4-carbon monoliths with controlled macropores: effects of pore properties on electrode performance Reviewed

    Hasegawa George, Sannohe Mai, Ishihara Yuya, Kanamori Kazuyoshi, Nakanishi Kazuki, Abe Takeshi

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Vol. 15 ( 22 ) page: 8736-8743   2013

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    DOI: 10.1039/c3cp50352f

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  87. Hierarchically porous monoliths of oxygen-deficient anatase TiO2-x with electronic conductivity Reviewed

    Kitada Atsushi, Hasegawa George, Kobayashi Yoji, Miyazaki Kohei, Abe Takeshi, Kanamori Kazuyoshi, Nakanishi Kazuki, Kageyama Hiroshi

    RSC ADVANCES   Vol. 3 ( 20 ) page: 7205-7208   2013

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    DOI: 10.1039/c3ra40545a

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  88. Layered double hydroxide (LDH)-based monolith with interconnected hierarchical channels: enhanced sorption affinity for anionic species Reviewed

    Tokudome Yasuaki, Tarutani Naoki, Nakanishi Kazuki, Takahashi Masahide

    JOURNAL OF MATERIALS CHEMISTRY A   Vol. 1 ( 26 ) page: 7702-7708   2013

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    DOI: 10.1039/c3ta11110e

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  89. New Insights into the Relationship between Micropore Properties, Ionic Sizes, and Electric Double-Layer Capacitance in Monolithic Carbon Electrodes Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki, Abe Takeshi

    JOURNAL OF PHYSICAL CHEMISTRY C   Vol. 116 ( 50 ) page: 26197-26203   2012.12

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    DOI: 10.1021/jp309010p

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  90. Structure and properties of polymethylsilsesquioxane aerogels synthesized with surfactant n-hexadecyltrimethylammonium chloride Reviewed

    Hayase Gen, Kanamori Kazuyoshi, Nakanishi Kazuki

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 158   page: 247-252   2012.8

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  91. Selective Preparation of Macroporous Monoliths of Conductive Titanium Oxides TinO2n-1 (n=2, 3, 4, 6) Reviewed

    Kitada Atsushi, Hasegawa George, Kobayashi Yoji, Kanamori Kazuyoshi, Nakanishi Kazuki, Kageyama Hiroshi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   Vol. 134 ( 26 ) page: 10894-10898   2012.7

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    DOI: 10.1021/ja302083n

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  92. Synthesis of Monolithic Hierarchically Porous Iron-Based Xerogels from Iron(III) Salts via an Epoxide-Mediated Sol-Gel Process Reviewed

    Kido Yasuki, Nakanishi Kazuki, Miyasaka Akira, Kanamori Kazuyoshi

    CHEMISTRY OF MATERIALS   Vol. 24 ( 11 ) page: 2071-2077   2012.6

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    DOI: 10.1021/cm300495j

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  93. Facile preparation of macroporous graphitized carbon monoliths from iron-containing resorcinol-formaldehyde gels Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki

    MATERIALS LETTERS   Vol. 76   page: 1-4   2012.6

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  94. Pore properties of hierarchically porous carbon monoliths with high surface area obtained from bridged polysilsesquioxanes Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 155   page: 265-273   2012.6

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  95. Flower-like surface modification of titania materials by lithium hydroxide solution Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Sugawara Yoshihiro, Ikuhara Yuichi, Nakanishi Kazuki

    JOURNAL OF COLLOID AND INTERFACE SCIENCE   Vol. 374   page: 291-296   2012.5

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  96. New Monolithic Capillary Columns with Well-Defined Macropores Based on Poly(styrene-co-divinylbenzene) Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Ishizuka Norio, Nakanishi Kazuki

    ACS APPLIED MATERIALS & INTERFACES   Vol. 4 ( 5 ) page: 2343-2347   2012.5

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    DOI: 10.1021/am300552q

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  97. Hierarchically Porous Materials by Phase Separation: Monoliths

    Nakanishi Kazuki

    HIERARCHICALLY STRUCTURED POROUS MATERIALS: FROM NANOSCIENCE TO CATALYSIS, SEPARATION, OPTICS, ENERGY, AND LIFE SCIENCE     page: 241-267   2012

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  98. Hierarchically Structured Porous Materials: Application to Separation Sciences Reviewed

    Nakanishi Kazuki

    HIERARCHICALLY STRUCTURED POROUS MATERIALS: FROM NANOSCIENCE TO CATALYSIS, SEPARATION, OPTICS, ENERGY, AND LIFE SCIENCE     page: 517-529   2012

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  99. Evolution of Mesopores in Monolithic Macroporous Ethylene-Bridged Polysilsesquioxane Gels Incorporated with Nonionic Surfactant Reviewed

    Mushiake Atsushi, Kanamori Kazuyoshi, Nakanishi Kazuki

    INTERNATIONAL JOURNAL OF POLYMER SCIENCE     2012

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    DOI: 10.1155/2012/460835

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  100. Role of block copolymer surfactant on the pore formation in methylsilsesquioxane aerogel systems Reviewed

    Kurahashi Masayuki, Kanamori Kazuyoshi, Takeda Kazuyuki, Kaji Hironori, Nakanishi Kazuki

    RSC ADVANCES   Vol. 2 ( 18 ) page: 7166-7173   2012

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    DOI: 10.1039/c2ra20799k

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  101. Facile Preparation of Monolithic LiFePO4/Carbon Composites with Well-Defined Macropores for a Lithium-Ion Battery Reviewed

    Hasegawa George, Ishihara Yuya, Kanamori Kazuyoshi, Miyazaki Kohei, Yamada Yuki, Nakanishi Kazuki, Abe Takeshi

    CHEMISTRY OF MATERIALS   Vol. 23 ( 23 ) page: 5208-5216   2011.12

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    DOI: 10.1021/cm2021438

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  102. New hierarchically porous titania monoliths for chromatographic separation media Reviewed

    Hasegawa George, Morisato Kei, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF SEPARATION SCIENCE   Vol. 34 ( 21 ) page: 3004-3010   2011.11

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    DOI: 10.1002/jssc.201100538

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  103. Preparation of Hierarchically Porous Nanocrystalline CaTiO3, SrTiO3 and BaTiO3 Perovskite Monoliths Reviewed

    Ruzimuradov Olim, Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 94 ( 10 ) page: 3335-3339   2011.10

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  104. Fabrication of highly crosslinked methacrylate-based polymer monoliths with well-defined macropores via living radical polymerization Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki, Yamago Shigeru

    POLYMER   Vol. 52 ( 21 ) page: 4644-4647   2011.9

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  105. Facile preparation of monolithic magnesium titanates with hierarchical porosity Reviewed

    Ruzimuradov Olim N., Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 119 ( 1390 ) page: 440-444   2011.6

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    DOI: 10.2109/jcersj2.119.440

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  106. Performance evaluation of long monolithic silica capillary columns in gradient liquid chromatography using peptide mixtures Reviewed

    Eghbali Hamed, Sandra Koen, Detobel Frederik, Lynen Frederic, Nakanishi Kazuki, Sandra Pat, Desmet Gert

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1218 ( 21 ) page: 3360-3366   2011.5

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  107. Transition from transparent aerogels to hierarchically porous monoliths in polymethylsilsesquioxane sol-gel system Reviewed

    Kanamori Kazuyoshi, Kodera Yasunori, Hayase Gen, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF COLLOID AND INTERFACE SCIENCE   Vol. 357 ( 2 ) page: 336-344   2011.5

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  108. Monolithic silica rod columns for high-efficiency reversed-phase liquid chromatography Reviewed

    Miyazaki Shota, Takahashi Masakazu, Ohira Masayoshi, Terashima Hiroyuki, Morisato Kei, Nakanishi Kazuki, Ikegami Tohru, Miyabe Kanji, Tanaka Nobuo

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1218 ( 15 ) page: 1988-1994   2011.4

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  109. Synthesis of hierarchical macro/mesoporous dicalcium phosphate monolith via epoxide-mediated sol-gel reaction from ionic precursors Reviewed

    Tokudome Yasuaki, Miyasaka Akira, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 57 ( 3 ) page: 269-278   2011.3

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  110. New flexible aerogels and xerogels derived from methyltrimethoxysilane/dimethyldimethoxysilane co-precursors Reviewed

    Hayase Gen, Kanamori Kazuyoshi, Nakanishi Kazuki

    JOURNAL OF MATERIALS CHEMISTRY   Vol. 21 ( 43 ) page: 17077-17079   2011

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    DOI: 10.1039/c1jm13664j

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  111. Controlled pore formation in organotrialkoxysilane-derived hybrids: from aerogels to hierarchically porous monoliths Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki

    CHEMICAL SOCIETY REVIEWS   Vol. 40 ( 2 ) page: 754-770   2011

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    DOI: 10.1039/c0cs00068j

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  112. Monolithic electrode for electric double-layer capacitors based on macro/meso/microporous S-Containing activated carbon with high surface area Reviewed

    Hasegawa George, Aoki Mami, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi, Tadanaga Kiyoharu

    JOURNAL OF MATERIALS CHEMISTRY   Vol. 21 ( 7 ) page: 2060-2063   2011

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    DOI: 10.1039/c0jm03793a

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  113. In situ SAXS observation on metal-salt-derived alumina sol-gel system accompanied by phase separation Reviewed

    Tokudome Yasuaki, Nakanishi Kazuki, Kanamori Kazuyoshi, Hanada Teiichi

    JOURNAL OF COLLOID AND INTERFACE SCIENCE   Vol. 352 ( 2 ) page: 303-308   2010.12

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  114. Facile Preparation of Hierarchically Porous TiO2 Monoliths Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 93 ( 10 ) page: 3110-3115   2010.10

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  115. Synthesis of high-silica and low-silica zeolite monoliths with trimodal pores Reviewed

    Tokudome Yasuaki, Nakanishi Kazuki, Kosaka Sho, Kariya Ayuta, Kaji Hironori, Hanada Teiichi

    MICROPOROUS AND MESOPOROUS MATERIALS   Vol. 132 ( 3 ) page: 538-542   2010.8

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  116. Sol-gel preparation of Ni/TiO2 catalysts with bimodal pore structures Reviewed

    Numata Masayuki, Takahashi Ryoji, Yamada Ikuya, Nakanishi Kazuki, Sato Satoshi

    APPLIED CATALYSIS A-GENERAL   Vol. 383 ( 1-2 ) page: 66-72   2010.7

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  117. Fabrication of activated carbons with well-defined macropores derived from sulfonated poly(divinylbenzene) networks Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    CARBON   Vol. 48 ( 6 ) page: 1757-1766   2010.5

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  118. Facile preparation of transparent monolithic titania gels utilizing a chelating ligand and mineral salts Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 53 ( 1 ) page: 59-66   2010.1

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  119. Hierarchically porous carbon monoliths with high surface area from bridged polysilsesquioxanes without thermal activation process Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    CHEMICAL COMMUNICATIONS   Vol. 46 ( 42 ) page: 8037-8039   2010

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    DOI: 10.1039/c0cc02974b

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  120. Macro- and microporous carbon monoliths with high surface areas pyrolyzed from poly(divinylbenzene) networks Reviewed

    Hasegawa Joji, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    COMPTES RENDUS CHIMIE   Vol. 13 ( 1-2 ) page: 207-211   2010

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  121. Sol-gel synthesis, porous structure, and mechanical property of polymethylsilsesquioxane aerogels Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 117 ( 1372 ) page: 1333-1338   2009.12

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    DOI: 10.2109/jcersj2.117.1333

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  122. Semi-micro-monolithic columns using macroporous silica rods with improved performance

    Morisato Kei, Miyazaki Shota, Ohira Masayoshi, Furuno Masahiro, Nyudo Masahiko, Terashima Hiroyuki, Nakanishi Kazuki

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1216 ( 44 ) page: 7384-7387   2009.10

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  123. Sol-gel synthesis of macro-mesoporous titania monoliths and their applications to chromatographic separation media for organophosphate compounds Reviewed

    Konishi Junko, Fujita Koji, Nakanishi Kazuki, Hirao Kazuyuki, Morisato Kei, Miyazaki Shota, Ohira Masayoshi

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1216 ( 44 ) page: 7375-7383   2009.10

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  124. Structural characterization of hierarchically porous alumina aerogel and xerogel monoliths Reviewed

    Tokudome Yasuaki, Nakanishi Kazuki, Kanamori Kazuyoshi, Fujita Koji, Akamatsu Hirofumi, Hanada Teiichi

    JOURNAL OF COLLOID AND INTERFACE SCIENCE   Vol. 338 ( 2 ) page: 506-513   2009.10

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  125. Performance of wide-pore monolithic silica column in protein separation Reviewed

    Morisaka Hironobu, Kobayashi Kengo, Kirino Aya, Furuno Masahiro, Minakuchi Hiroyoshi, Nakanishi Kazuki, Ueda Mitsuyoshi

    JOURNAL OF SEPARATION SCIENCE   Vol. 32 ( 15-16 ) page: 2747-2751   2009.8

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    DOI: 10.1002/jssc.200800653

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  126. Rigid Crosslinked Polyacrylamide Monoliths with Well-Defined Macropores Synthesized by Living Polymerization Reviewed

    Hasegawa Joji, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi, Yamago Shigeru

    MACROMOLECULAR RAPID COMMUNICATIONS   Vol. 30 ( 12 ) page: 986-990   2009.6

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    DOI: 10.1002/marc.200900066

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  127. Effect of La addition on thermal microstructural evolution of macroporous alumina monolith prepared from ionic precursors Reviewed

    Tokudome Yasuaki, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 117 ( 1363 ) page: 351-355   2009.3

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    DOI: 10.2109/jcersj2.117.351

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  128. Pore Formation in Poly(divinylbenzene) Networks Derived from Organotellurium-Mediated Living Radical Polymerization Reviewed

    Hasegawa Joji, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi, Yamago Shigeru

    MACROMOLECULES   Vol. 42 ( 4 ) page: 1270-1277   2009.2

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    DOI: 10.1021/ma802343a

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  129. Elastic Aerogels and Xerogels Synthesized From Methyltrimethoxysilane (MTMS) Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    POLYMER-BASED SMART MATERIALS - PROCESSES, PROPERTIES AND APPLICATION   Vol. 1134   page: 173-+   2009

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  130. Preparation of Macroporous Poly(divinylbenzene) Gels Via Living Radical Polymerization Reviewed

    Hasegawa Joji, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi, Yamago Shigeru

    POLYMER-BASED SMART MATERIALS - PROCESSES, PROPERTIES AND APPLICATION   Vol. 1134   page: 139-+   2009

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  131. Spinodal decomposition in siloxane sol-gel systems in macroporous media Reviewed

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    SOFT MATTER   Vol. 5 ( 16 ) page: 3106-3113   2009

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    DOI: 10.1039/b903444g

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  132. Fabrication of macroporous silicon carbide ceramics by intramolecular carbothermal reduction of phenyl-bridged polysilsesquioxane Reviewed

    Hasegawa George, Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF MATERIALS CHEMISTRY   Vol. 19 ( 41 ) page: 7716-7720   2009

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    DOI: 10.1039/b913992c

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  133. Elastic organic-inorganic hybrid aerogels and xerogels

    Kanamori Kazuyoshi, Aizawa Mamoru, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 48 ( 1-2 ) page: 172-181   2008.11

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  134. Facile Synthesis of Macroporous Cross-Linked Methacrylate Gels by Atom Transfer Radical Polymerization

    Kanamori Kazuyoshi, Hasegawa Joji, Nakanishi Kazuki, Hanada Tefichi

    MACROMOLECULES   Vol. 41 ( 19 ) page: 7186-7193   2008.10

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    DOI: 10.1021/ma800563p

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  135. Scattering-based hole burning through volume speckles in a random medium with tunable diffusion constant Reviewed

    Murai Shunsuke, Fujita Koji, Hirao Takayuki, Nakanishi Kazuki, Hirao Kazuyuki, Tanaka Katsuhisa

    APPLIED PHYSICS LETTERS   Vol. 93 ( 15 )   2008.10

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    DOI: 10.1063/1.2955830

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  136. Preparation and properties of radiofrequency sputtered X-ray amorphous films in the system SiO2-ZrO2

    Sawa Akira, Nakanishi Kazuki, Hanada Teiichi

    THIN SOLID FILMS   Vol. 516 ( 15 ) page: 4665-4672   2008.6

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  137. Preparation of monolithic silica columns for high-performance liquid chromatography

    Nunez Oscar, Nakanishi Kazuki, Tanaka Nobuo

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1191 ( 1-2 ) page: 231-252   2008.5

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  138. Alkoxy-derived multiscale porous TiO2 gels probed by ultra-small-angle X-ray scattering and small-angle X-ray scattering

    Konishi Junko, Fujita Koji, Nakanishi Kazuki, Nishitsuji Shotaro, Takenaka Mikihito, Miura Kiyotaka, Hirao Kazuyuki

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 46 ( 1 ) page: 63-69   2008.4

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  139. Crystalline ZrO2 monoliths with well-defined macropores and mesostructured skeletons prepared by combining the alkoxy-derived sol-gel process accompanied by phase separation and the solvothermal process

    Konishi Junko, Fujita Koji, Oiwa Satoshi, Nakanishi Kazuki, Hirao Kazuyuki

    CHEMISTRY OF MATERIALS   Vol. 20 ( 6 ) page: 2165-2173   2008.3

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    DOI: 10.1021/cm703351d

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  140. Multiscale templating of siloxane gels via polymerization-induced phase separation

    Nakanishi Kazuki, Amatani Tomohiko, Yano Seiji, Kodaira Tetsuya

    CHEMISTRY OF MATERIALS   Vol. 20 ( 3 ) page: 1108-1115   2008.2

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    DOI: 10.1021/cm702486b

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  141. Cr3+-doped macroporous Al2O3 monoliths prepared by the metal-salt-derived sol-gel method

    Fujita Koji, Tokudome Yasuaki, Nakanishi Kazuki, Miura Kiyotaka, Hirao Kazuyuki

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 354 ( 2-9 ) page: 659-664   2008.1

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  142. Phase separation in alkoxy-derived silica system containing polyacrylamide

    Kawamoto Kousuke, Nakanishi Kazuki, Hanada Teiichi

    ORGANIC/INORGANIC HYBRID MATERIALS - 2007   Vol. 1007   page: 63-68   2008

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  143. Phase separation in Al2O3 sol-gel system incorporated with high molecular weight poly(ethylene oxide)

    Tokudome Yasuaki, Nakanishi Kazuki, Fujita Koji, Miura Kiyotaka, Hirao Kazuyuki

    ORGANIC/INORGANIC HYBRID MATERIALS - 2007   Vol. 1007   page: 69-74   2008

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  144. Hierarchically porous oxides, hybrids and polymers via sol-gel accompanied by phase separation

    Nakanishi Kazuki

    ORGANIC/INORGANIC HYBRID MATERIALS - 2007   Vol. 1007   page: 51-62   2008

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  145. Sol-gel synthesis of macroporous YAG from ionic precursors via phase separation route

    Tokudome Yasuaki, Fujita Koji, Nakanishi Kazuki, Kanamori Kazuyoshi, Miura Kiyotaka, Hirao Kazuyuki, Hanada Teiichi

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 115 ( 1348 ) page: 925-928   2007.12

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  146. Sur-face interaction of well-defined, concentrated poly,(2-hydroxyethyl methacrylate) brushes with proteins

    Yoshikawa Chiaki, Goto Atsushi, Tsujii Yoshinobu, Ishizuka Norio, Nakanishi Kazuki, Fukuda Takeshi

    JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY   Vol. 45 ( 21 ) page: 4795-4803   2007.11

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    DOI: 10.1002/pola.22224

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  147. Sol-gel with phase separation. Hierarchically porous materials optimized for high-performance liquid chromatography separations

    Nakanishi Kazuki, Tanaka Nobuo

    ACCOUNTS OF CHEMICAL RESEARCH   Vol. 40 ( 9 ) page: 863-873   2007.9

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    DOI: 10.1021/ar600034p

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  148. Synthesis of monolithic Al2O3 with well-defined macropores and mesostructured skeletons via the sol-gel process accompanied by phase separation

    Tokudome Yasuaki, Fujita Koji, Nakanishi Kazuki, Miura Kiyotaka, Hirao Kazuyuki

    CHEMISTRY OF MATERIALS   Vol. 19 ( 14 ) page: 3393-3398   2007.7

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    DOI: 10.1021/cm063051p

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  149. New transparent methylsilsesquioxane aerogels and xerogels with improved mechanical properties

    Kanamori Kazuyoshi, Aizawa Mamoru, Nakanishi Kazuki, Hanada Teiichi

    ADVANCED MATERIALS   Vol. 19 ( 12 ) page: 1589-+   2007.6

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    DOI: 10.1002/adma.200602457

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  150. Three-dimensional observation of macroporous silica gels and the study on structural formation mechanism

    Saito Haruko, Kanamori Kazuyoshi, Nakanishi Kazuki, Hirao Kazuyuki, Nishikawa Yukihiro, Jinnai Hiroshi

    COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS   Vol. 300 ( 1-2 ) page: 245-252   2007.6

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  151. Temperature-tunable scattering strength based on the phase transition of liquid crystal infiltrated in well-defined macroporous random media

    Murai Shunsuke, Fujita Koji, Hirao Takayuki, Nakanishi Kazuki, Hirao Kazuyuki

    OPTICAL MATERIALS   Vol. 29 ( 8 ) page: 949-954   2007.4

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  152. Simple liquid chromatography using monolithic silica rod and capillary

    Oi Naobumi, Morisato Kei, Minakuchi Hiroyoshi, Nakanishi Kazuki

    BUNSEKI KAGAKU   Vol. 56 ( 4 ) page: 227-229   2007.4

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  153. Functional porous materials via sol-gel with phase separation

    Nakanishi Kazuki

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 115 ( 1339 ) page: 169-175   2007.3

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  154. High-throughput protein digestion by trypsin-immobilized monolithic silica with pipette-tip formula

    Ota Shigenori, Miyazaki Shota, Matsuoka Hideo, Morisato Kei, Shintani Yukihiro, Nakanishi Kazuki

    JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS   Vol. 70 ( 1 ) page: 57-62   2007.2

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  155. Size-exclusion effect and protein repellency of concentrated polymer brushes prepared by surface-initiated living radical polymerization

    Yoshikawa Chiaki, Goto Atsushi, Ishizuka Norio, Nakanishi Kazuki, Kishida Akio, Tsujii Yoshinobit, Fukuda Takeshi

    MACROMOLECULAR SYMPOSIA   Vol. 248   page: 189-198   2007

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    DOI: 10.1002/masy.200750220

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  156. Monolithic TiO2 with controlled multiscale porosity via a template-free sol-gel process accompanied by phase separation

    Konishi Junko, Fujita Koji, Nakanishi Kazuki, Hirao Kazuyuki

    CHEMISTRY OF MATERIALS   Vol. 18 ( 25 ) page: 6069-6074   2006.12

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    DOI: 10.1021/cm0617485

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  157. Performance of monolithic silica capillary columns with increased phase ratios and small-sized domains

    Hara Takeshi, Kobayashi Hiroshi, Ikegami Tohru, Nakanishi Kazuki, Tanaka Nobuo

    ANALYTICAL CHEMISTRY   Vol. 78 ( 22 ) page: 7632-7642   2006.11

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    DOI: 10.1021/ac060770e

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  158. Thick silica gel coatings on methylsilsesquioxane monoliths using anisotropic phase separation

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    JOURNAL OF SEPARATION SCIENCE   Vol. 29 ( 16 ) page: 2463-2470   2006.11

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    DOI: 10.1002/jssc.200600163

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  159. Rigid macroporous poly(divinylbenzene) monoliths with a well-defined bicontinuous morphology prepared by living radical polymerization

    Kanamori Kazuyoshi, Nakanishi Kazuki, Hanada Teiichi

    ADVANCED MATERIALS   Vol. 18 ( 18 ) page: 2407-+   2006.9

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    DOI: 10.1002/adma.200601026

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  160. Morphological control and strong light scattering in macroporous TiO2 monoliths prepared via a colloid-derived sol-gel route

    Fujita Koji, Konishi Junko, Nakanishi Kazuki, Hirao Kazuyuki

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS   Vol. 7 ( 6 ) page: 511-518   2006.9

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  161. High-performance liquid chromatographic enantioseparations on capillary columns containing crosslinked polysaccharide phenylcarbamate derivatives attached to monolithic silica

    Chankvetadze Bezhan, Kubota Takateru, Ikai Tomoyuki, Yamamoto Chiyo, Kamigaito Masami, Tanaka Nobuo, Nakanishi Kazuki, Okamoto Yoshio

    JOURNAL OF SEPARATION SCIENCE   Vol. 29 ( 13 ) page: 1988-1995   2006.8

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    DOI: 10.1002/jssc.200500388

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  162. Fabrication of Sm2+-doped macroporous aluminosilicate glasses with high alumina content

    Hirao Takayuki, Fujita Koji, Murai Shunsuke, Nakanishi Kazuki, Hirao Kazuyuki

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 352 ( 23-25 ) page: 2553-2557   2006.7

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  163. Formation of photonic structures in Sm2+-doped aluminosilicate glasses through phase separation

    Fujita Koji, Murai Shunsuke, Nakanishi Kazuki, Hirao Kazuyuki

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 352 ( 23-25 ) page: 2496-2500   2006.7

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  164. Mutual consistency between simulated and measured pressure drops in silica monoliths based on geometrical parameters obtained by three-dimensional laser scanning confocal microscope observations

    Saito Haruko, Nakanishi Kazuki, Hirao Kazuyuki, Jinnai Hiroshi

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1119 ( 1-2 ) page: 95-104   2006.6

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  165. Anisotropic siloxane-based monolith prepared in confined spaces

    Suzumura Yoshitaka, Kanamori Kazuyoshi, Nakanishi Kazuki, Hirao Kazuyuki, Yamamichi Junta

    JOURNAL OF CHROMATOGRAPHY A   Vol. 1119 ( 1-2 ) page: 88-94   2006.6

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  166. Thermodynamics of aggregation of two proteins Reviewed

    Nakanishi Kazuki, Kikuchi Macoto

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 75 ( 6 )   2006.6

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    DOI: 10.1143/JPSJ.75.064803

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  167. Sol-gel process of oxides accompanied by phase separation

    Nakanishi Kazuki

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   Vol. 79 ( 5 ) page: 673-691   2006.5

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    DOI: 10.1246/bcsj.79.673

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  168. Porous methylsiloxane gel thick film for millimeter-wave antenna substrate prepared by gap filling method

    Tanaka Takeharu, Kawakami Nobuyuki, Hirano Takayuki, Fukumoto Yoshito, Suzuki Tetsuo, Kanamori Kazuyoshi, Nakanishi Kazuki

    MATERIAL AND DEVICES FOR SMART SYSTEMS II   Vol. 888   page: 251-+   2006

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  169. Size exclusion chromatography of standard polystyrenes with a wide range of molecular weight up to 7.45 x 10(6) on monolithic silica capillary columns

    Ute Koichi, Yoshida Saori, Kitayama Tatsuki, Bamba Takeshi, Harada Kazuo, Fukusaki Eiichiro, Kobayashi Akio, Ishizuka Norio, Minakuchi Hiroyoshi, Nakanishi Kazuki

    POLYMER JOURNAL   Vol. 38 ( 11 ) page: 1194-1197   2006

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    DOI: 10.1295/polymj.PJ2006079

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  170. High-performance frontal analysis of the binding of thyroxine enantiomers to human serum albumin

    Kimura T, Nakanishi K, Nakagawa T, Shibukawa A, Matsuzaki K

    PHARMACEUTICAL RESEARCH   Vol. 22 ( 4 ) page: 667-675   2005.4

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  171. Insight on structural change in sol-gel-derived silica gel with aging under basic conditions for mesopore control

    Takahashi R, Nakanishi K, Soga N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 33 ( 2 ) page: 159-167   2005.2

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  172. Topical application of ionic polymers affects skin permeability barrier homeostasis

    Denda M, Nakanishi K, Kumazawa N

    SKIN PHARMACOLOGY AND PHYSIOLOGY   Vol. 18 ( 1 ) page: 36-41   2005

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    DOI: 10.1159/000081684

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  173. High-performance liquid chromatographic enantioseparations on capillary columns containing monolithic

    Chankvetadze B, Yamamoto C, Tanaka N, Nakanishi K, Okamoto Y

    JOURNAL OF SEPARATION SCIENCE   Vol. 27 ( 10-11 ) page: 905-911   2004.7

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    DOI: 10.1002/jssc.200401819

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  174. Monolithic silica columns with chemically bonded beta-cyclodextrin as a stationary phase for enantiomer separations of chiral pharmaceuticals

    Lubda D, Cabrera K, Nakanishi K, Lindner W

    ANALYTICAL AND BIOANALYTICAL CHEMISTRY   Vol. 377 ( 5 ) page: 892-901   2003.11

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  175. Monolithic LC columns

    Tanaka N, Kobayashi H, Nakanishi K, Minakuchi H, Ishizuka N

    ANALYTICAL CHEMISTRY   Vol. 73 ( 15 ) page: 420A-429A   2001.8

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  176. About the total performance of monolithic HPLC-columns.

    Cabrera K, Minakuchi H, Lubda D, Nakanishi K

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   Vol. 221   page: U100-U100   2001.4

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  177. Porous gels made by phase separation: Recent progress and future directions

    Nakanishi K

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 19 ( 1-3 ) page: 65-70   2000.12

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  178. Membrane emulsification using sol-gel derived macroporous silica glass

    Fuchigami T, Toki M, Nakanishi K

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 19 ( 1-3 ) page: 337-341   2000.12

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  179. Preparation and chromatographic application of macroporous silicate in a capillary

    Ishizuka N, Nakanishi K, Hirao K, Tanaka N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 19 ( 1-3 ) page: 371-375   2000.12

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  180. Formation of hierarchical pore structure in silica gel

    Nakanishi K, Takahashi R, Nagakane T, Kitayama K, Koheiya N, Shikata H, Soga N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 17 ( 3 ) page: 191-210   2000.3

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  181. Aggregation behavior of alkoxide-derived silica in sol-gel process in presence of poly(ethylene oxide)

    Takahashi R, Nakanishi K, Soga N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 17 ( 1 ) page: 7-18   2000.1

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  182. Tailoring mesopores in monolithic macroporous silica for HPLC

    Nakanishi K, Shikata H, Ishizuka N, Koheiya N, Soga N

    HRC-JOURNAL OF HIGH RESOLUTION CHROMATOGRAPHY   Vol. 23 ( 1 ) page: 106-110   2000.1

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  183. Performance of an octadecylsilylated continuous porous silica column in polypeptide separations

    Minakuchi H, Ishizuka N, Nakanishi K, Soga N, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 828 ( 1-2 ) page: 83-90   1998.12

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  184. Chromatographic properties of miniaturized silica rod columns

    Ishizuka N, Minakuchi H, Nakanishi K, Soga N, Hosoya K, Tanaka N

    HRC-JOURNAL OF HIGH RESOLUTION CHROMATOGRAPHY   Vol. 21 ( 8 ) page: 477-479   1998.8

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  185. Morphology control of macroporous silica-zirconia gel based on phase separation

    Takahashi R, Nakanishi K, Soga N

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   Vol. 106 ( 8 ) page: 772-777   1998.8

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    DOI: 10.2109/jcersj.106.772

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  186. Designing monolithic double-pore silica for high-speed liquid chromatography

    Ishizuka N, Minakuchi H, Nakanishi K, Soga N, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 797 ( 1-2 ) page: 133-137   1998.2

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  187. Effect of domain size on the performance of octadecylsilylated continuous porous silica columns in reversed-phase liquid chromatography

    Minakuchi H, Nakanishi K, Soga N, Ishizuka N, Tanaka N

    JOURNAL OF CHROMATOGRAPHY A   Vol. 797 ( 1-2 ) page: 121-131   1998.2

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  188. Pore Structure Control of Silica Gels Based on Phase Separation

    Nakanishi Kazuki

    JOURNAL OF POROUS MATERIALS   Vol. 4 ( 2 ) page: 67-112   1997.6

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  189. Double pore silica gel monolith applied to liquid chromatography

    Nakanishi K, Minakuchi H, Soga N, Tanaka N

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 8 ( 1-3 ) page: 547-552   1997

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  190. Octadecylsilylated porous silica rods as separation media for reversed-phase liquid chromatography

    Minakuchi H, Nakanishi K, Soga N, Ishizuka N, Tanaka N

    ANALYTICAL CHEMISTRY   Vol. 68 ( 19 ) page: 3498-3501   1996.10

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  191. EFFECTS OF AGING AND SOLVENT EXCHANGE ON PORE STRUCTURE OF SILICA-GELS WITH INTERCONNECTED MACROPORES

    TAKAHASHI R, NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 189 ( 1-2 ) page: 66-76   1995.8

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  192. Small-angle X-Ray scattering study of nanopore evolution of macroporous silica gel by solvent exchange

    Takahashi R, Nakanishi K, Soga N

    FARADAY DISCUSSIONS   Vol. 101   page: 249-263   1995

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  193. Phase Separation Kinetics in Silica Sol-Gel System Containing Polyethylene Oxide. I. Initial Stage

    Nakanishi Kazuki, Yamasaki Yuki, Kaji Hironori, Soga Naohiro, Inoue Tadashi, Nemoto Norio

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 2 ( 1-3 ) page: 227-231   1994.1

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  194. In Situ Observation of Phase Separation Processes in Gelling Alkoxy-Derived Silica System by Light Scattering Method Reviewed

    Kaji Hironori, Nakanishi Kazuki, Soga Naohiro, Inoue Tadashi, Nemoto Norio

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 3 ( 3 ) page: 169-188   1994.1

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  195. Polymerization-Induced Phase Separation in Silica Sol-Gel Systems Containing Formamide Reviewed

    Kaji Hironori, Nakanishi Kazuki, Soga Naohiro

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY   Vol. 1 ( 1 ) page: 35-46   1993.1

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  196. MACROPORE STRUCTURE DESIGN OF SOL-GEL DERIVED SILICA BY SPINODAL DECOMPOSITION

    NAKANISHI K, KAJI H, SOGA N

    POROUS MATERIALS   Vol. 31   page: 51-60   1993

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  197. DUAL-POROSITY SILICA-GELS BY POLYMER-INCORPORATED SOL-GEL PROCESS

    NAKANISHI K, TAKAHASHI R, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 147   page: 291-295   1992.10

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  198. PHASE-SEPARATION IN SILICA SOL-GEL SYSTEM CONTAINING POLYACRYLIC-ACID .3. EFFECT OF CATALYTIC CONDITION

    NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 142 ( 1-2 ) page: 36-44   1992.4

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  199. CRYSTALLIZATION OF SILICA-GELS CONTAINING SODIUM POLY-4-STYRENE SULFONATE

    NAKANISHI K, SOGA N

    JOURNAL OF NON-CRYSTALLINE SOLIDS   Vol. 108 ( 2 ) page: 157-162   1989.3

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KAKENHI (Grants-in-Aid for Scientific Research) 26

  1. Macroporous monoliths surface-modified with MOF using precise ligand exchange

    Grant number:18H02056  2018.4 - 2021.3

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    Grant amount:\17290000 ( Direct Cost: \13300000 、 Indirect Cost:\3990000 )

  2. In-situ generated metal/alloy nanoparticles within monolithic hydridosilica support applied to catalytic reactions

    Grant number:26288106  2014.4 - 2017.3

    Nakanishi Kazuki

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    Grant amount:\17290000 ( Direct Cost: \13300000 、 Indirect Cost:\3990000 )

    Hydrolysis/polycondensation of trialkoxysilanes was carefully conducted to preserve Si-H ligands followed by the sol-gel transition accompanied by phase separation, which lead to the formation of hierarchically macro/meso-porous hydridosilica monoliths. By introducing noble metals solutions with optimized solvent composition into the hydridosilica monoliths, metal/alloy nanoparticles were formed in a controlled manner. The catalytic performance was evaluated using the monolithic flow-through reactors with embedded metal/alloy nanoparticles as catalysts. Dehydrogenation catalyzed by borane catalyst was also explored to modify silica supports with well-defined pore structure with polymeric reagents bearing Si-H groups. The metal/alloy nanoparticles were produced on the surface of silica support of which catalytic performance was examined in detail.

  3. Preparation of porous lithium iron phosphate - carbon monolith via liquid-phase route

    Grant number:25620185  2013.4 - 2015.3

    NAKANISHI Kazuki

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    Grant amount:\4030000 ( Direct Cost: \3100000 、 Indirect Cost:\930000 )

    Macroporous monolithic lithium iron phosphate has been synthesized from iron chloride hexahydrate, orthophosphoric acid and lithium chloride, via a sol-gel process accompanied by phase separation. For materials synthesized by substituting a part of starting compositions, the variation in the electrode capacity was relatively small. As an alternative materials, macroporous monolithic titanium oxides were adopted. Using non-aqueous sol-gel method, macroporous titanium oxide monoliths containing a high concentration of nitrogen were synthesized, followed by appropriate heat-treatment to obtain nitrogen-doped titanium oxide. In the setup of lithium ion battery, the capacity as cathode of the material increased with the doped concentration of nitrogen. In addition, direct nitridation of macroporous titanium oxide using the gas phase reaction with ammonia has also been established.

  4. Development of light-transmitting heat-insulation materials using novel hybrid gels

    Grant number:20350094  2008 - 2010

    NAKANISHI Kazuki

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    Grant amount:\19240000 ( Direct Cost: \14800000 、 Indirect Cost:\4440000 )

    Light-transmitting, low-density organic-inorganic hybrid solid materials suitable for heat-insulation were obtained in the methylsilsesquioxane system via one-step synthesis using surfactants and urea as additives followed by either super-critical or ambient evaporation drying of the solvent. Gels with hierarchiall macro-and mesopores have also been synthesized by careful tuning ofthe compositions and reaction conditions. The relation between gas pressure and thermal conductivity of the above materials have been investigated in relation to their pore structures.

  5. Development of Nano-reaction Supports Using Hierarchically Porous Structure

    Grant number:15206072  2003 - 2005

    NAKANISHI Kazuki

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    Grant amount:\49140000 ( Direct Cost: \37800000 、 Indirect Cost:\11340000 )

    Porous silica gels having sharply distributed macropores were prepared by a sol-gel reaction accompanied by a phase separation. Laser scanning confocal microscopy was utilized to obtain a series of thin-sliced images of the gels, from which the three-dimensional configuration was reconstructed. On the three-dimensional configuration, a statistical processing has been performed to extract size distribution of pores and gel skeletons as well as porosity, which have been conventionally measured by indirect method. Additional analysis on local surface curvatures gave information on mean curvature and Gauss curvature, which lead to the quantitative evaluation of the geometrical features of macroporous network. Liquid flow behavior was examined using real and simulated pressure drops against porosity.

  6. 共連続多孔質ゲルのマイクロチップ化

    Grant number:14655241  2002 - 2003

    萌芽研究

    中西 和樹

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    Grant amount:\3200000 ( Direct Cost: \3200000 )

    溶融石英基板に幅あるいは直径10〜50ミクロンの矩形の溝あるいは円形の孔を穿った、上面開放型マイクロチップを微細加工した。また同等な内径を有する溶融シリカキャピラリーを用意した。この微細加工基板に必要に応じてシランカップリング反応を用いて疎水処理(オクタデシルシリル基による表面修飾)を施した。メチルトリメトキシシランあるいはテトラメトキシシランを出発物質とする相分離を伴うゾル-ゲル反応系を用いてマクロ多孔構造を作製し、走査型電子顕微鏡によって乾燥試料を観察すると共に、ゲル骨格内あるいはマクロ孔内にフルオレセイン溶液を導入した後、レーザー励起による蛍光を共焦点顕微鏡で観察することにより、多孔構造の3次元観察と界面付近の構造の観察を試みた。
    相分離によって自発的に形成される相領域(ドメイン)の特性長(典型的に構造周期の一波長分)が、溝の幅やキャピラリー内径より十分小さい間は、微小界面の影響によるドメインの局所変形や流動は、壁面近傍のみに限定される。ところが特性長と制限空間のサイズが同程度に達すると、反応系は自発的なドメイン形成よりも、容器壁への濡れ転移を起こすことにより、容器壁に均一なコート層を形成する。また制限空間のサイズが100ミクロン程度以上の場合には、粗大化して流動するドメインの形態に重力の影響が認められ、特に濡れ転移を伴う場合には、変形の度合いは特性長の数倍にも及んだ。これらの変形過程は、相領域形成とゾル-ゲル転移による構造凍結の競争によって起こるため、相分離開始からゾル-ゲル転移までの時間が短い反応系ほど、局所的な変形は抑制された。したがって、共連続構造のゲル材料をマイクロチップ化するためには、界面構造の均質化と重力の影響の軽減が重要な因子となることが分かった。

  7. Development of monolithic silica columns in capillary for high-speed and high-performance HPLC

    Grant number:12554032  2000 - 2002

    TANAKA Nobuo

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    The development of porous monolithic silica columns in capillary for micro-HPLC was studied to achieve higher performance than columns packed with particles. Following experiments were carried out.
    (1) Preparation of a monolithic silica column in a capillary from alkoxysilanes.
    (2) Preparation of monolithic silica columns in capillaries of various sizes, 25-250 μm.
    (3) Study on the effect of domain size (through-pore size + silica skeleton size) and the ratio between through-pore size and skeleton size on the performance.
    (4) Preparation of ultrahigh efficiency monolithic silica columns.
    (5) Preparation of monolithic silica columns showing high efficiency in a short time.
    (6) Study on the factors determining band-broadening in a monolithic silica column.
    (7) Evaluation of monolithic silica columns in micro-HPLC and CEC.
    (8) Application of monolithic silica columns for the separation of various types of compounds including bases, dissociable compounds, and hydrocarbons.
    Following results were obtained.
    (1) It is possible to prepare network-type monolithic silica attached to the tube wall of fused silica capillary having 50-250 μm diameter.
    (2) Decrease in domain size showed similar effects as the decrease in particle size in a particle-packed column, causeing higher column pressure drop and higher column efficiency.
    (3) A monolithic silica capillary column of 100 μm, 250 cm gave 200, 000 - 300, 000 theoretical plates with to = 1000 s.
    (4) A monolithic silica capillary column with through-pores = 1.5 μm and skeleton size 0.8 μm gave 10.000 theoretical plates with to = 15 S.
    (5) The band-broadening in a monolithic silica column is dominated by A-term, or the contrubution of slow mass transfer in mobile phase, especially when the monolith possesses large through-pore size. Monoliths having small domain size showed the major contibution of stationary phase mass transfer.
    (6) Hybrid-type monolithic silica columns showed high performance for the separation of various types of compounds including bases, b-blockers, steroids, ketones, phthalates, aicohols, and hydrocarbon of various structures.
    Monolithic silica columns in 200 μm capillary can show performance 2 - 3 times higher than particle-packed columns under common conditions and are relatively easy to use. They can be applied for the separatin of a wide range of compounds. Thus they are close to practical use. (1) Preparation of larger-sized capillary, (2) various surface monofication by on-column reactions(3) optimization of domain structures, and (4) theoretical and experimental study on band-broadening in monolithic silica columns will be practical and basic subjects to study in this area. Other study will include the preparation of monolithic silica in a chip channels and multidimensional chromatography in a microscale HPLC.

  8. ORDER FORMATION OF INORGANIC SOL-GEL SYSTEM IN CONFINED SPACES

    Grant number:12450268  2000 - 2001

    NAKANISHI Kazuki

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    Grant amount:\12400000 ( Direct Cost: \12400000 )

    Macroporous gel samples in the systems of silica or siloxane-based organic-inorganic hybrid were synthesized in small confined spaces of slab, thin columnar and short columnar shapes. In the slab shaped confined spaces with the thickness up to 30 microns, the characteristic size of phase separation frozen in the gel structure became coarser with a decrease in the thickness of the confined space both in silica or hybrid systems. On hydrophobized container walls, the formation of skin layer was observed in the case of hybrid composition, which was accompanied by the depletion layer and columnar phase separated domains in the vicinity of the container walls. Detailed analysis of these structures by 3-D observation with laser scanning con focal microscopy revealed that the phase separation was affected by the presence of walls that cause surface-spinodal wave. As a result of superposition of the co-continuous domain structure and the layer-like surface-induced structure, the depletion layer and the columnar deformed domains were formed. On the other hand, on hydrophilized container walls, the gel domains were chemically bonded without forming the skin layer. Depletion layers and columnar deformed domains similar to the case of hydrophobized walls were observed. However, in this case, the depletion layers were formed as a result of compromise between repulsive interaction between gel domains and walls and chemical anchoring of the domains on the silanol-containing walls. Unique very fine phase separated structures were observed when the confined space was in the same dimension as the size of phase separated domains.

  9. メゾ凝集と相分離に基づく規則的多重細孔材料の作製

    Grant number:11875140  1999

    萌芽的研究

    中西 和樹

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    Grant amount:\2100000 ( Direct Cost: \2100000 )

    自己組織化したメソ構造のテンプレートとして、ハロゲン化アルキルトリメチルアンモニウムを選び、これを酸性触媒下アルコキシシランを出発物質とするシリカのゾル-ゲル過程に共存させて、相分離の誘起の有無およびメソ孔構造の特性長と規則性を調べた。ゾルーゲル反応によって得られたゲルは、乾燥後600℃において熱処理を行い、界面活性剤を除去した後にX線回折測定によるメソ孔の規則性の評価と、電子顕微鏡及び窒素吸着法による細孔構造の評価に供した。まず、ゲル形成時反応温度が高いほど、相分離によるマクロ孔構造の得られる出発組成領域は広くなったが、反面メソ孔構造の規則性は低くなった。界面活性剤に含まれるハロゲン化物イオンについては、塩素と臭素についてメソ構造形成に対する効果には差異が認められなかったが、相分離傾向に関してはイオン半径の小さい塩化物イオンの方が強くなった。また、アルキル基の影響を炭素数を16および18の間で比較したところ、炭素数18の界面活性剤を共存させた試料がより高いメソ孔容積を示し、相分離をも助長することが明らかになった。X線回折による規則性の高さは、ほぼ相分離傾向と一致していた。結論として、長いアルキル鎖と小さい対イオンを含み、シリカ重合対との相互作用が強い界面活性剤ほど、規則性の高いメソ孔構造を誘起するとともに相分離を助長することが分かった。本年度研究では、研究計画全体のうちバルク体ゲルにおける規則的多重細孔構造の発現を確認するにとどまったが、同様の原理は薄膜についても適用可能と考えられる。

  10. Ecomaterial Technology for Fluoride-polluted Ground Water in China

    Grant number:10041147  1998 - 1999

    TABATA Masahiro

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    Since the cause of various health problems in the most areas of China is due to the high fluorine and arsenic content in drinking water, the principal means of prevention is to decrease the concentration of fluorine and arsenic in drinking water. To remove pollutants such as fluorine and arsenic from ground water in China, it is necessary to clear up the following problems : energy saving, resources savings and environmental protection.
    In this research project, we assessed the systems of pollutants removal from ground water from the view point of environmentally conscious technology. Results of this research project are summarized as follows :
    (1) Problems of fluorine and arsenic in China are quite serious conditions. Therefore, water treatment technique adapted to economic and technological conditions of China is required.
    (2) To remove fluorine in polluted water, conversion reaction of calcium phosphates is quite useful. Calcium phosphates is converted to fluoroapatite (FApCaィイD210ィエD2(POィイD24ィエD2)ィイD26ィエD2FィイD22ィエD2: Ap = apatite), which is one of natural fluoride resources. Using this reaction, fluoride ions in drinking water is removed as Fluoride-apatite with high efficiency.
    (3) It is appeared that waste from marine products industry, such as fish bone and shells, are able to use start materials for the removal of fluorine from polluted water.

  11. Development of porous silica rod columns for higher performance of HPLC

    Grant number:09554050  1997 - 1999

    TANAKA Nobuo

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    (1) Three types of monolithic silica columns derivatized to C18 phase were prepared.
    (2) The continuous silica columns having micrometer-size silica skeletons and micrometer-size through-pores gave higher efficiency and much lower pressure drop on the basis of the small-sized skeletons with much higher through-pore size/skeleton size ratios than conventional particle-packed columns.
    (3) Silica rod columns prepared in a mold and covered with heat shrinking PTFE tubing showed nearly an order of magnitude lower flow resistance and much higher column efficiency than conventional columns packed with 5 μm particles at high linear velocity of the mobile phase.
    (4) Silica monoliths prepared in a fused silica capillary showed even lower pressure drop.
    (5) The column efficiency of the capillary monolith was lower than those prepared in a mold, especially at high linear velocity, presumably due to the presence of much larger through-pores.
    (6) The silica rods covered with PEEK to be a prototype product showed higher flow-resistance than the other monolithic silica columns, but they still showed higher column efficiency and lower pressure drop than popular 5μm silica packing materials for reversed-phase liquid chromatography.
    (7) The silica monolith in capillary can also be used in CEC to generate much higher column efficiency.
    (8) The silica monoliths showed much higher performance for polypeptide separations than current HPLC packing materials, providing the shortening of separation time by a factor of three or more.
    (9) The optimization and characterization of silica monoliths in terms of structural and chromatographic properties will lead to the development of columns for HPLC and CEC of much higher performance.
    (10) The monolithic columns will provide high performance (with current HPLC instrumentation) that is comparable with that of ultrahigh pressure liquid chromatography or CEC.

  12. Development of mesoporous materials by solid-liquid reactions within gel network

    Grant number:09555190  1997 - 1998

    NAKANISHI Kazuki

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    Grant amount:\2300000 ( Direct Cost: \2300000 )

    The mesopore formation behavior in alkoxy-derived wet silica gels having co-continuous macropores has been investigated under varied conditions of aging. The starting gels were prepared via sol-gel route which include phase separation, and were aged under neutral to weakly basic conditions either by external addition or internal generation of ammonium hydroxide. The pH values of mother liquor of gels prepared in the presence of urea increased up to 10 by the thermal decomposition. Under non-hydrothemal conditions, the mesopore evolution depended only on pH values and temperatures during aging, and no substantial differences were recognized in the drying shrinkage and heat-evolution between the external and internal methods. In the additional hydrothermal aging performed with urea-containing gels, a significant acceleration of mesopore evolution rate was observed with an increase of aging temperature. At 200。C, the final size of mesopores reached 50nm with a marked decrease of their volume fraction. Above 200。C, the inner part of columnar gel skeletons eluted out and reprecipiated on their outer surface, thus resulted in the hollow columns with their walls consisting of granular building units less densely aggregated. The crystallization of the gel sample, however, was never observed possibly due to high purity of the gel samples. In contrast, the amorphous titania gels crystallized more easily under hydrothermal conditions.

  13. 液相法二重細孔シリカの分離機能

    Grant number:09750751  1997 - 1998

    奨励研究(A)

    中西 和樹

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    Grant amount:\2400000 ( Direct Cost: \2400000 )

    ケイ素アルコキシドの加水分解・重縮合反応においで、ゾル-ゲル転移時に相分離を同時に誘起することのできる条件を選び、マイクロメートル領域の共連続ドメイン(ゲル相および溶媒相)を持つゲルを作製し、さらに密閉条件下で種々のbHおよび温度で熟成することにより、乾燥・熱処速後に形成されるメゾ細孔耕造を併せ持つ、二重細孔ゲルを作製した。この方法により、2μmのシリカ骨格と3μmのマクロ細孔および直径12nmのメゾ細孔を併せ持つ二重細孔ゲルを毛細管中で作製し、シランカップリング処理によって表面を疎水化した後に、液体クロマトグラフィーカラムとしての分離性能を評価した。毛細管壁とゲルの密着性が悪く大きい間隙が観察されたカラムでは、HPLCモードの分離牲能は試料流速に強く依存し、理論段高の絶対値も大きかった。電算クロマトグラフィーに対する適用では、シリカゲル中の金属不純物が極めて少ないために、従来カラムよりも低い電気浸透流の値しか得られないが、分離性能そのものは従来カラムと同等あるいはそれ以上になった。また、アルキル基を有するケイ素アルコキシドを用いて、同等のマクロ孔構造を持つ毛細管カラムを作製したところ、毛細管壁とゲルの間隙はゲルの有するマグロ孔と同じ程度の大きさになった。このカラムは、HPLCモードにおいても分離性能の試料流速による変化が少なく、また電気クロマトグラフィーにおいても、優れた分離特性を示すことがわかった。

  14. Development of Novel Inorganic Material for Chromatographic Column Without Particle Packing

    Grant number:07555480  1995 - 1996

    SOGA Naohiro

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    Tetramethoxysilane was hydrolyzed in thepresence of polyethylene oxide having an average molecular weight of 10000 using acetic acid as a catalyst, which gave a wet silica gel with inetrconnected macropores about 2mum wide. The gel was subsequently immersed in aqueous solutions of ammonia with varied concentration for varied periods, then dried by evaporating the solvent, and finally heat-treated at 600゚C for 2 hours. The resultant gel retained narrowly distributed mesopores with their median size distributing from 5 to 20nm. The rod-shaped gel thus obtained was clad with a thermoshrinking resin on its side wall, suface-modified by a flow reaction with silane coupling agents, equipped with connecting devices for an ordinary HPLC apparatus, then the separation performance was investigated.
    A mixture of alkylbenzenes was analyzed using the rod-shaped column with the average macropore diameter of 1.6mum and mesopore diameter of 11nm. The pressure drop for the rod-shaped colummn at the same sample flow rate was less than half that of conventional particle-packed columns. Furthermore, the height equivalent to theoretical plate (HETP) remained almost unchanged for the rod-shaped column between 1mm/s and 5mm/s of linear flow rate, whereas that of conventional particle packed columns increased almost linearly with the flow rate. As a result, the HETP of the rod-shaped column became five times smaller than that of conventional ones. Simmilar difference in the pressure drop and the flowrate dependence of HETP was obsereved also in the case of separation of insulin. These results indicate that the rod-shaped column gives almost an order better separation performance than conventional ones. The superiority of the rod column in the high speed separation was experimentally confirmed to be due to the existence of thin silica skeleton associated with high fraction of macropores.

  15. 界面活性剤と無機高分子の相互作用に基づくゾル-ゲル反応

    Grant number:07750751  1995

    奨励研究(A)

    中西 和樹

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    Grant amount:\900000 ( Direct Cost: \900000 )

    非イオン性界面活性剤であるポリオキシエチレンノニルフェニルエーテルを、シリコンアルコキシドの加水分解・重合過程に共存させ、シリカ重合体と界面活性剤分子間のコンプレックス形成によって起こる相挙動を調べた。エチレンオキシド単位を平均70個もつ親水性の高い界面活性剤では、低分子量ポリエチレングリコールを共存させた場合と同様に、中間的な界面活性剤/シリカ比の比較的狭い領域において、ゾル-ゲル転移と同程度の時間スケールで相分離が起こり、相分離による絡み合い構造がゲル構造として観察された。エチレンオキシド単位が10程度に短い場合、ゾル-ゲル転移の開始は相分離に対して、界面活性剤/シリカ比とともに単調に遅くなり、より高い界面活性剤/シリカ比およびより広い溶媒分率において絡み合い構造が形成された。また反応温度の上昇とともに、両系ともにより溶媒分率の高い組成において絡み合い構造が生じた。
    反応開始からコンプレックス形成およびゲル化に至るまでのシリカ重合体の構造を、小角X線散乱法によって実時間観察した結果、加水分解反応開始直後から、シリカ重合体と界面活性剤は相互作用を示すことが明らかになった。特に親水鎖の短い界面活性剤においては、その水溶液中でのミセルサイズにほぼ対応する不均一構造を形成しながら、シリカ重合体の成長が進んだ。親水鎖が長い場合にはメゾ細孔容積は界面活性剤濃度にほとんど依存しないが、この系のゲルにおいてはメゾ細孔容積は界面活性剤濃度に比例して増加した。したがってマクロ孔をもったシリカゲルのメゾ細孔容積を、ミセル形成を利用して制御できることが明らかになった。

  16. Preparation and Characterization of Transparent Magnetic Oxide Meterials

    Grant number:06453122  1994 - 1996

    SOGA Naohiro

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    Transparent magnetic oxide materials are useful as magnetooptical devices and windows for shielding of magnetic fields. The aim of the present research is to prepare new transparent magnetic oxide materials and to characterize the magnetic, optical, and magnetooptical properties of the resultant materials. The main results of the research can be summarized as follows :
    (1) Faraday effect measurements have been carried out at room temperature for some sodium borate glasses containing Eu^<2+> ions prepared under a reducing atmosphere. The wavelength dependence of the Verdet constant is analyzed in terms of a theory derived by Van Vleck and Hebb to obtain effective transition wavelength of the 4f^7*4f^6 5d transition which canuses the Faraday effect of Eu^<2+> in the visible range. The effective transition wavelength increases with an increase in the optical basicity of glass. This phenomenon is explained in terms of the crystal field theory ; because the splitting of 5d levels is larger in the glass with larger optical basicity, the energy required for the 4f^7*4f^6 5d transition decreases as the optical basicity of glass increases. The magnitude of Verdet constant increases with an increase in the effective transition wavelength when the concentration of EuO remains constant.
    (2) We have examined the effect of heat treatment temperature and time on the magnetic properties of rapidly quenched oxides with compositions close to ZnFe_2O_4, which show high magnetization even at room temperature as we found. In particular, an attention is focused on the oxide with nominal composition of 60ZnO・40Fe_2O_3. X-ray diffraction, Zn K-edge extended X-ray absorption fine structure (EXAFS), Mossbauer spectroscopy, and magnetization measurements are carried out to clarify the variation of crystal structure and magnetic properties with heat treatment. The rapidly quenched specimen contains zinc ferrite with lattice parameter 0.05% smaller than that of ZnFe_2O_4 as the main phase, and exhibits the magnetization of 23.8 emu/g at room temperature. The X-ray diffraction, EXAFS and Mossbauer measurements suggest that the high magnetization is brought about by the Fe^<3+> ion clusters with the Zn^<2+> ions occupying octahedral sites as well as the solid solution of Fe_3O_4 in the ZnFe_2O_4. As the heat treatment temperature increases, the room temperature magnetization decreases sluggishly below 500゚C and decreases sharply above 600゚C when the heat treatment time is 2h. The variation of EXAFS and Mossbauer spectra with heat treatment temperature suggests that the decrease of magnetization below 500゚C corresponds to the transfer of Zn^<2+> ions from octahedral to tetrahedral sites while the rapid decrease of magnetization above 600゚C is caused by the oxidation of Fe^<2+> to form ZnFe_2O_4 with normal spinel structure. A complicated behavior is observed at around 550゚C ; the magnetization once increases at 550-600゚C and then decreases rapidly as the heat treatment temperature increases. We speculate that at the initial stage of the oxidation of Fe^<2+>, vacancies of Fe^<3+> ions at the octahedral sites are created, leading to the increase of magnetization.

  17. X線小角散乱法による無機非晶質ゲルのメゾ細孔形成過程の解析

    Grant number:06750859  1994

    奨励研究(A)

    中西 和樹

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    Grant amount:\900000 ( Direct Cost: \900000 )

    数種の水溶性有機高分子、あるいは部分的に加水分解を受けた後重縮合するシリカと親和性の低い極性溶媒の共存下において、珪素アルコキシドを加水分解することにより、ゾル-ゲル転移とスピノ-ダル分解を並行して誘起し、溶媒置換操作に好適なマイクロメートル領域の絡み合い多孔構造を持つシリカゲルを得た。所定の組成においてゾル-ゲル反応および熟成後、湿潤状態のゲルを様々なpHを持つ水溶液に浸漬して溶媒置換を行った。まず、十分平衡な構造が得られる浸漬時間を決定し、続いて適切な時間間隔毎に、溶媒置換中のゲルのX線小角散乱を湿潤状態のままで測定した。散乱データをPorodプロットし、散乱プロファイルの傾きからフラクタル構造の変化を見積もったところ、弱酸性および中性条件では検出し得るほどの構造変化は認められなかった。塩基性条件下での置換においては、湿潤状態では次数約2の体積フラクタル的構造であったものが、浸漬後数時間で、細かい構造から順に表面フラクタルの構造へと変化してゆくことが明らかになった。浸潤状態でのフラクタル次元は、出発組成や共存高分子の種類によって差異が認められたが、塩基性溶液中での溶媒置換によってほぼ同等のメゾ細孔構造を得ることが可能であった。最終状態の細孔構造は、置換溶媒のpHと置換時の温度によって一義的に決まるが、置換溶媒の量が少ない場合には、最終構造に至るまでの構造変化は緩慢に起こることが明らかになった。これは構造変化の律速段階が溶出過程であることを示唆していた。

  18. Development of bio-science materials by designing porous structure and surface property of oxide gels.

    Grant number:05555170  1993 - 1994

    Grant-in-Aid for Developmental Scientific Research (B)

    SOGA Naohiro

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    Silica gels with controlled interconnected pores in micrometer range have been prepared by hydrolyzing alkoxysilane in the presence of a certain kind of water-soluble polymer using acetic acid as a catalyst. The time-resolved laser light scattering measurements of gelling solution revealed that the interconnected structure is developed when the phase separation by the spinodal mechanism and the sol-gel transition take place almost concurrently. The soaking of gels, prior to the evaporation of the solvent, in ammonia solutions with various concentration and volume ratio to the gel piece at various temperatures resulted in the modification of nanometer range pore structures into well-defined mesopores up to 20nm in diameter, after appropriate drying and heat-treatment. The higher the ammonia concentration, and the higher the soaking temperature, the larger the pore size became. When the soaking was carried out with smaller volume of solvent against a gel piece, the structural change was retarded. This result indicates that the dissolution of silica from the wet gel surface into the external solvent is the rate determining step of the whole structure evolution due to dissolution and re-precipitation of silica. The soaking treatment could completely eliminate the micropores in the gel specimen. An evaluation of silica monoliths having double pore sturcures thus prepared was carried out as a chromatographic column material. After chemical modification of hydrophilic silica gel surface with octadecyl and methyl ligands, a rod shaped monolith was clad with polymer, and was equipped to an LC apparatus. The separation factors for alkylbenzens of the monolithic column was almost the same as that of conventional packed beads column, however, the applied pressure for the same sample flow rate was reduced to 1/2 to 1/3 of conventional one.

  19. 無機ゾル-ゲル系におけるスピノ-ダル分解過程の光散乱法による解析

    Grant number:05750610  1993

    奨励研究(A)

    中西 和樹

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    Grant amount:\1100000 ( Direct Cost: \1100000 )

    数種の水溶性有機高分子あるいは極性の高い溶媒の共存下において、珪素アルコキシドを加水分解することにより、ゲル化とスピノ-ダル分解がほぼ同時に起こり得る条件を探索し、マイクロメートル領域の多孔構造形成過程を追跡した。相分離によって起こる濃度揺らぎの時間発展を、He-Neレーザーを光源とし、フォトダイオードアレイを検出系とした光散乱装置を用いて、1秒ごとに時間分割追跡した。まず、相分離初期の濃度揺らぎの時間発展が指数関数的であり、波長一定の期間が存在することを確認した。このことは、相分離過程がスピノ-ダル分解機構に従って起こっていることを示していた。次に、出発組成や反応温度を変化させて、ゾル-ゲル転移と相分離過程の開始時期の相対関係を変化させたところ、以下のことが明らかになった。
    (1)相分離過程がゾル-ゲル転移よりも十分早く開始すると、散乱プロファイルは多くの液-液相分離系で見られるのと同様な時間変化を示し、その後期過程においてゾル-ゲル転移に起因すると推察される構造の凍結が起こった。
    (2)ゾル-ゲル転移による網目形成に並行して相分離過程が開始すると、ドメインの形成過程は相分離開始が遅いほど減速され、構造凍結はより早く起こった。
    (3)ゾル-ゲル転移が開始して十分時間が経ってから相分離過程が進行する場合には、ほとんど濃度揺らぎの周期波長は変化しないまま、網目内の濃度コントラストだけが拡大して、比較的規則正しい多孔構造が形成された。

  20. Development of materials with ordered structure through phase separation of inorganic-organic mixed sol-gel system

    Grant number:02555161  1990 - 1991

    Grant-in-Aid for Developmental Scientific Research (B)

    SOGA Naohiro

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    A method of preparing silica gels with micrometer-range inte-rconnected pores by hydrolyzing alkoxysilanes under coexistence of water-soluble polymers has been investigated in detail. Following results have been obtained ;
    1. Many kinds of water-soluble polymers that have substantial solubility in--water-alcohol mixed solvent can be used in the process.
    2. Hydrolysis of alkoxysilanes under strongly acidic condition is favored but polycondensation may be conducted also under more basic condition.
    3. Light scattering profiles of gelling solution exhibited first a continuous development of concentration fluctuation with a fixed periodic wavelength, second a parallel increase of fluctuation and periodic wavelength, and finally a fixation of periodic wavelength and further increase of concentra tion difference. These changes indicate a concurrent occurrence of spinodal decomposition and sol-gel transition in the reacting system.
    4. Morphology of gels can be controlled by changing starting composition and reaction temperature. Reaction conditions which make a phase separation to occur earlier relative to a sol-gel transition result in coarse morphologies and vice versa. Polymers with high solubility in water-alcohol mixed solvent are favored to obtain gel morphologies with better reproducibility.
    5. By exchanging solvent phase in wet gels with micrometer-range interconnected pores, the volume and distribution of nanometer-range pores can be, modified to a large extent. This process enables one to tailor pore structure of gels both in micrometer- and nanometer-ranges.

  21. 超急熱・急冷法による混合陰イオン無機非晶質の作製と性能評価

    Grant number:01604563  1989

    曽我 直弘

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    非晶質材料を作製する際、溶融状態において熱力学的平衡状態を取らせず、また急速に冷却するという極限条件を採用することで新しい機能をもたせる可能性がある。これまで化学結合様式から考えて超陰イオン伝導性が期待できるフッ化物系の非晶質について、超急熱・急冷法の条件のもとで試料作製を試み、高イオン伝導度ガラスを得ることができた。本研究では、さらに導電率が高く、安定性の良いガラス組成を探索する目的で種々のカチオンを導入したオキシフルオライドガラスを作製し、その構造や結合に対する知見を得、フッ化物イオン伝導のメカニズムを検討することを目的とした。得られた成果は次の通りである。
    (1)ZnF_2-PbF_2-SiO_2系、(2)MnF_2-PbF_2-SiO_2系、(3)BiF_3-PbF_3-SiO_3系のガラスを作製し、その電気伝導測定を行った。この系を選んだのは、前年度に報告したように各成分の分極率が大きく、フッ化物イオン伝導性が向上すると考えたからである。測定結果を分極率に対してプロットしたところ良い相関が得られたことより、分極率の大きさもフッ化物イオン伝導に寄与することが明らかになった。
    (2)フッ素と酸素が共存する、いわゆる混合アニオン効果の原因を探るためXPSスペクトルの測定を行った。フッ化物ガラスにSiO_2を導入していくとFisスペクトルのピ-クが低結合エネルギ-側にしていき、SiO_210モル%付近から高結合エネルギ-側にも新たなピ-クが生じた。前者のピ-クはMnやPbに弱く結合した荷電担体となりうるフリ-のFイオンによるもので、後者のピ-クはSiO_2ネットワ-ク中のSiに強く結合したFイオンによるものである。つまり、導電率が増加した要因はフリ-のFイオンのピ-ク位置が低結合エネルギ-側に変化していることと関係していると考えられた。この効果はPbの存在下で顕著になったが、電導度の値の上昇も良い対応関係にあったことは特筆すべきである。

  22. 原子レベルからみたセラミックス粒界ガラス相の破壊挙動

    Grant number:01647510  1989

    平尾 一之

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    セラミックスの破壊強度は雰囲気の影響を大きく受ける。この効果はガラス相が粒界相に存在する場合、顕著であってガラス相の水分による応力腐食がクラック進展の主因であるとも、いわれている。このようなガラスの破壊挙動を調べるために、従来の弾性体モデルではなく、化学結合を考慮した原子や分子レベルからの破壊挙動のモデルをまず組み立てた。具体的には結晶化しやすいガラスとして高アルカリ含有のホウ酸塩やケイ酸塩ガラス、粒界にガラス相を多く含む窒化ケイ素、人工骨セラミックスであるアパタイトなどを選び、安定破壊をおこさせ、その塑性変形挙動を調べ、モデル化すると共にクラック先端での観察をTEMやコンピュ-タシミュレ-ションで行い破壊のメカニズムを原子レベルで調べた。コンピュ-タシミュレ-ションは分子動力学法を用いて行った。所定の組成のガラスを約千個ほどの原子を用いて基本セル内に作成し、2軸方向(xy表面)だけ境界条件をはずし自由表面にしたものをx軸とy軸方向から2軸圧縮応力や引っ張り応力をかけた。応力をかける温度は400℃と1500℃で応力にともなう原子の拡散や内部応力の変化を求めた。その結果を以下に示す。
    (1)ガラスの温度を1500℃まで上げ、融液状態にしたあとX軸Y軸のスケ-ルを20%減少させることにより2軸圧縮応力をかけた。応力をかけた瞬間、内部応力は非常に高くなるが、Z軸方向の応力は4PSで、X軸方向の応力は15PSで原子の移動に伴い応力が緩和していくことがわかった。
    (2)400℃では固体的な挙動を示した。応力印加後、5PSで内部応力が急激に減少し、塑性変形のような挙動がみられた。しかし、未だ内部応力が大きいにもかかわらず、Siや酸素の拡散は少なく、15PSからは殆ど移動はみられないことから考えてケイ酸塩ガラスは塑性変形しにくい。

  23. Studies on Middle Range Structure of Amorphous Inorganic Materials and its Controlling

    Grant number:63430014  1988 - 1990

    Grant-in-Aid for General Scientific Research (A)

    SOGA Naohiro

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    Amorphous oxides and fluorides were prepared by using twin-roller quenching, sputtering and sol-gel method. Several spectroscopic studies and measurements of physical properties were carried out on the resultant amorphous materials to obtain middle range structure of these materials and to discuss the relation between the structure and the properties. The results obtained are as follows.
    1. High ionic conductivity was observed in MnF_2-MnO-SiO_2 and MnF_2-PbF_2-SiO_2 glasses prepared by the twin-roller quenching method. It was revealed from XPS measurements that the fluoride ions occupy two kinds of sites in these oxyflouride glasses and fluoride ions in one of the two sites contribute to the high ionic conductivity. This aspect on the chemical state of fluoride ions was coincident with the result obtained by the molecular dynamics simulation.
    2. Mossbauer measurements were carried out on oxide glasses, silica gel, amorphous alloys and oxide crystals containing iron or europium. The bonding characteristics of iron and europium in these materials were discussed systematically.
    3. It was discovered for the first time that upconversion-pumped fluorescence takes place in some oxide glasses even at room temperature. The lattice vibrational energy and the strength of electron-phonon interaction in the oxide glasses were clarified from phonon sideband spectra. On the basis of the experimental results, the origin of appearance of the upconversion-pumped fluorescence was discussed.
    4. The work of fracture for soda borate glasses was measured using short-bar specimens with chevron notch. An inelastic phenomenon was observed in the boron oxide-rich glass.

  24. 超急熱・急冷法による混合陰イオン無機非晶質の作製と性能評価

    Grant number:63604557  1988

    曾我 直弘

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    超急熱・急冷法を用いて非晶質材料を作製すると非平衡状態をかなり保持できるので、従来の溶融法では得られなかった新しい機能性をもたせる可能性がある。本研究では高いフッ化物イオン伝導性を有すると考えられた(A)MnF_2-PbF_2-SiO_2系、(B)ZnF_2-PbF_2-SiO_2系、(C)BiF_3-PbF_2-SiO_2系について、イメージ炉と双ローラー装置を用いた超急熱・急冷法により、非晶質試料を作製し、直流導電率及び光電子分光(XPS)測定を行った。(A)系はかなりの組成領域にわたってガラス化した。200℃での導電率および活性化エネルギーをSiO_2含有量に対してプロットしたところ、SiO_210モル%組成で導電率は極大値を、活性化エネルギーは極小値をとり、既に報告したMnF_2-MnO_2-SiO_2系と同様の混合アニオン効果が現れた。このガラス組成45MnF_2-45PbF_2-10SiO_2は、200℃での導電率が10^<-4>S・cm^<-1>とフッ化物ガラスの中でトップデータに属するものである。XPSスペクトルの結果、このガラス組成付近で2種類のフッ素イオンの存在が確認された。また分子動力学法コンピュータシミュレーションによりFイオンの動的挙動を解析したところ、あるサイトで振動しているFイオンと別のサイトへ拡散していくFイオンが存在するという同様の結果が得られた。以上の結果より、最高導電率を示した45MnF_2-45PbF_2-10SiO_2ガラスは、結合状態の異なるFイオンがガラス中に存在し、弱い結合力をもったFイオンが導電率を上げたためであると推察した。しかし、(B)系や(C)系のオキシフルオライドガラスでは明確な混合アニオン効果がみられず、電導率の向上は見られなかった。混合アニオン効果の発現を明らかにするため、Pbイオンの分極が系に及ぼす影響やカチオンの電子相互作用を検討するとともに、Fイオンの動的挙動をさらにコンピュータシミュレーションで詳しく調べて、高イオン伝導性をさらに高めるガラスの探索を行っていく。

  25. Behavior of Sputtered Species and Formation of Amorphous Films

    Grant number:62470063  1987 - 1988

    Grant-in-Aid for General Scientific Research (B)

    HANADA Teiichi

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    Authorship:Coinvestigator(s) 

    1) Behavior of Sputtered Species During SIO_2 Sputtering
    In this study, the abundance distribuyion of nuetral sputtered species during SIO_2 sputtering was investigated by means of a quadrupole mass analyzer. The dependences of the abundance distribution upon O_2 content in the sputtering gas and upon the sputtering power were examined. SO, the neutral sputtered species during SIO_2 sputtering were determined to be Si, SiO, O. O_2. The ratio of the intensity of the mass spectrum for SiO to that for si increased with increasing O_2 content. The dependence of the abundance distribution upon O_2 content in the sputtering gas suggested that Si species reacted with O species to produce SiO species and that O_2 species were produced with the reaction between O species. The intensity of the mass spectra for both si and SiO species increased straightly with increasing the sputtering power, and then in had a plateau. This tendency was discussed in connection with sputtering process.
    2) Glow Discharge Mass Spectrometry During TeO_2 Sputtering
    The sputtered species furing TeO_2 sputtering was determined as a function of the oxygen partial pressure by using glow discharge mass spectrometry(GDMS). The oxygen content in the sputtering gas ranged from 0% to 100%. The ionic species during TeO_2 sputtering were found to be O_2^+, Ar^+, Ar_2^+, Te^+, TeO^+ and TeO_2^+. The ration of Te^+ to the total amount of Te^+, TeO^+ and TeO_2^+ decreased with increasing oxygen partial pressure. On the other hand, the opposite tendency was observed for the TeO^+ and the TeO_2^+ species. A fluorescence analysis was used in order to compare the composition of the sputtered species with that of the deposited thin film. This result suggests that the sputtered species react with oxygen on the substrate.

  26. 超急熱・急冷法による混合陰イオン無機非晶質の作製と性能評価

    Grant number:62604569  1987

    曽我 直弘

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    熔融状態において熱力学的変更状態を取らせず, また急速に冷却するという極限条件を用いて新材料を創製できる可能性がある. そこで本研究では, 化学結合様式から考えて高陰イオン伝導性が期待できるオキシフルオライド系の複合陰イオン非晶質について, 赤外線集光型イメージ炉を用いた超急熱・急冷法の条件のもとで試料作製を試み, 電気伝導度測定と状態分析を行った. 組成として(A)MnF_2-MnO_2-SiO_2系および(B)MnF_2-PbF_2-SiO_2系を選び, その非晶質を作製した. この系を選んだのは, 通常の熔融法で, 5MnF_2-85PbF_2-10A1(PO_3)_3組成のガラスが10-S・cm-とフッ化物ガラスの中で最高のイオン伝導度を示しているが, イメージ炉急熱・急冷法を用いると更に高融点の組成を熔融させる事ができるばかりでなくMnやPbイオンを非平衡な状態で入れることができ, 一部のフッ化物イオンを不安定な状態にとどめ, フッ化物イオンの伝導度を向上させる期待がもたれるからである. 直流電導度の結果は(A)系のMnO_2-SiO_2系においては10^<-12>S・cm^<-1>以下であったがMnF_2を添加することにより200°Cで10^<-1>S・cm^<-1>と増加した. これは酸素とフッ素を混合させた方がフッ素イオン単独よりもイオン伝導度があがるということを示している. これらのXPSスペクトルを調べたところ, 酸素を共存させた時, フッ素の結合状態が多様化していることがわかった. 即ち, 強い結合と弱い結合が同時に存在し, その結果, 電導度が増加していると推察された. また(B)系では(A)系に比べて2桁以上の電導度の増加がみられた. これは分極率が高く結合強度の弱いPbF_2の添加がフッ化物イオン伝導の増加に寄与しているためと考えられた. 今後, 伝導のメカニズムをさらに明らかにしとイオン伝導度を向上させることを試みる.

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Teaching Experience (On-campus) 2

  1. 固体化学基礎論

    2020

  2. 無機化学1および演習

    2020

 

Media Coverage 1

  1. 日本経済新聞 Newspaper, magazine

    日本経済新聞  8面スタートアップ  2020.3

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