Updated on 2021/03/30

写真a

 
MUTO, Shunsuke
 
Organization
Institute of Materials and Systems for Sustainability Advanced Measurement Technology Center Electron Nanoscopy Section Professor
Title
Professor

Degree 1

  1. 博士(工学) ( 1989.5   大阪大学 ) 

Research Interests 9

  1. Informatics techniques

  2. electronic states

  3. electron energy-loss spectroscopy

  4. transmission electron microscopy

  5. nanoindentation

  6. image processing

  7. Materials physics

  8. Informatics techniques

  9. nanotechnology

Research Areas 3

  1. Others / Others  / Engineering@Material Engineering@Physical Metallurgy

  2. Others / Others  / Engineering@Material Engineering@Inorganic Materials and Properties

  3. Others / Others  / Science@Physics@Solid‐State Physics I (Optical Properties, Semiconductor and Dielectrics)

Current Research Project and SDGs 5

  1. Development of advanced analysis methods of functional materials by integrated electron microscopic spectroscopy

  2. Nanoscale measurement of magnetic moments by electron magnetic circular dichroism

  3. Development of chemical imaging methods by applications of informatics techniques

  4. Site-selective chemical analysis using electron channeling iphenomena

  5. Study of nano-particles catalysts by operando HVEM-QMS

Research History 6

  1. Professor, Advances Measurement Technology Center, Institute of Materials and Systems for Sustainability

    2015.10

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    Country:Japan

  2. Nagoya University   Institute of Materials and Systems for Sustainability Advanced Measurement Technology Center Electron Nanoscopy Section   Professor

    2015.10

  3. Professor, Advances Measurement Technology Center, Institute of Materials and Systems for Sustainability

    2015.10

  4. Professor, Division of Energy Science, EcoTopia Science Institute

    2013.4 - 2015.9

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    Country:Japan

  5. Nagoya University   Green Mobility Collaborative Research Center Division   Researcher

    2011.4

  6. Nagoya University   Division   Researcher

    2011.4

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Education 2

  1. Osaka University   Graduate School, Division of Engineering Science   Physics

    1984.4 - 1986.3

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    Country: Japan

  2. Kyoto University   Faculty of Science

    1980.4 - 1984.3

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    Country: Japan

Professional Memberships 12

  1. Atomic Energy Society in Japan

    2015.5 - 2017.3

  2. Japan Institute of Metals

    2003.4

  3. Japanese Society of Microscopy

  4. European Materials Research Society

  5. American Electrochemical Society

  6. Physical Society of Japan

  7. Japanese Society of Microscopy

  8. Japan Institute of Metals

  9. Physical Society of Japan

  10. Atomic Energy Society in Japan

  11. European Materials Research Society

  12. American Electrochemical Society

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Committee Memberships 25

  1. 独立行政法人日本学術振興会「自律型・複合型AI先端計測の新しい価値創造」に関する研究開発専門委員会    委員  

    2018.4 - 2021.3   

  2. 公益社団法人日本顕微鏡学会第75回学術講演会   実行委員長  

    2017.4 - 2019.12   

  3. 公益社団法人日本セラミックス協会学術写真賞選考委員会   委員長  

    2015.5 - 2016.3   

  4. 公益社団法人日本金属学会 奨励賞選考委員会   「物性部門」選考委員  

    2015.4   

  5. 公益社団法人日本金属学会 奨励賞選考委員会   「物性部門」選考委員  

    2015.4   

  6. 公益社団法人日本顕微鏡学会電子顕微鏡解析技術分科会   実行委員  

    2014   

  7. 独立行政法人日本学術振興会 特別研究員等審査会及び国際事業委員会   専門委員及び書面審査員  

    2013.8 - 2014.7   

  8.   セッション責任者  

    2013.7 - 2014.9   

  9. 公益社団法人 日本顕微鏡学会理事会   理事  

    2013.5   

  10. 公益社団法人日本顕微鏡学会分科会「SEMの物理学」   幹事  

    2013.4   

  11. 公益社団法人日本金属学会 功績賞選考委員会   「物性部門」選考委員  

    2013.4 - 2014.3   

  12. 公益社団法人日本金属学会分科会(第1分科 エネルギー材料)   委員  

    2013.3   

  13. 公益社団法人日本顕微鏡学会学会賞選考委員会(奨励賞)   委員長Ⅲ 物質系応用研究主査  

    2012.12 - 2013.11   

  14. 公益社団法人日本金属学会第63回金属組織写真賞委員会   委員  

    2012.11   

  15. 公益社団法人日本顕微鏡学会学会賞選考委員会分野C   応用研究(非生物)委員  

    2011.11 - 2012.12   

  16.   組織委員  

    2009.5 - 2010.7   

  17. 公益社団法人日本金属学会和文誌・欧文誌編集委員会   編集委員  

    2008.3 - 2010.3   

  18.   組織委員  

    2007.12 - 2008.7   

  19. 最先端の電子顕微鏡と理論計算に関する国際シンポジウム組織委員会   委員  

    2007.10 - 2008.6   

  20. 公益社団法人日本顕微鏡学会欧文誌編集委員会   編集委員  

    2007.2 - 2013.3   

  21. 原子力研究・教育広域連携懇談会   研究連携WG委員  

    2005.10 - 2007.3   

  22. 公益社団法人 日本顕微鏡学会   評議員  

    2005.6 - 2007.5   

  23. 公益社団法人日本金属学会分科会   委員  

    2005.4   

  24. 公益社団法人日本顕微鏡学会和文誌編集委員会   編集委員  

    2005.4 - 2011.3   

  25. 第16回国際顕微鏡学会プログラム委員会   委員  

    2004.8 - 2006.9   

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Awards 17

  1. 日本顕微鏡学会学会賞(瀬藤賞)

    2010.5  

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  2. 日本電子顕微鏡学会2002年第17回論文賞

    2002  

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    Country:Japan

  3. 2009年論文賞(顕微鏡基礎部門)

    2009.5  

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  4. International Metallographic Contest:Class 3, First Place

    2001  

  5. 優秀ポスター賞

    2020.9   質量分析計搭載反応科学超高圧電子顕微鏡によるRh/ZrO2系自動車排気ガス浄化モデル触媒のNO還元反応オペランド計測

    前出淳志、田中天望、菅沼拓也、荒井重勇、樋口哲夫、武藤俊介

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

  6. 2020年論文賞(非生物系)

    2020.7   Twinned/untwinned catalytic gold nanoparticles identified by applying a convolutional neural network to their Hough transformed Z-contrast images

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

  7. 2020年論文賞(非生物系)

    2020.7   Twinned/untwinned catalytic gold nanoparticles identified by applying a convolutional neural network to their Hough transformed Z-contrast images

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

  8. 文科省 ナノテクノロジープラットフォーム令和元年度「秀でた利用成果」最優秀賞

    2020.4   ガス環境下における自動車触媒ナノ粒子のオペランドTEM観察

    田中 展望,菅沼 拓也,樋口 哲夫,武藤 俊介

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  9. 文科省 ナノテクノロジープラットフォーム令和元年度「秀でた利用成果」最優秀賞

    2020.4   ガス環境下における自動車触媒ナノ粒子のオペランドTEM観察

    田中 展望, 菅沼 拓也, 樋口 哲夫, 武藤 俊介

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  10. 2018年優秀論文賞(応用研究部門;材料系)

    2018.5   Quantitative analysis of cation mixing and local valence states in LiNixMn2−xO4 using concurrent HARECXS and HARECES measurements

    Yu Yamamoto, Kunimitsu Kataoka, Junji Akimoto, Kazuyoshi Tatsumi, Takashi Kousaka, Jun Ohnishi, Teruo Takahashi, and Shunsuke Muto

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  11. 2018年優秀論文賞(応用研究部門;材料系)

    2018.5   Quantitative analysis of cation mixing and local valence states in LiNixMn2−xO4 using concurrent HARECXS and HARECES measurements

    Yu Yamamoto, Kunimitsu Kataoka, Junji Akimoto, Kazuyoshi Tatsumi, Takashi Kousaka, Jun Ohnishi, Teruo Takahashi, Shunsuke Muto

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  12. 日本顕微鏡学会第66回学術講演会 優秀ポスター賞(材料部門)

    2010.5  

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  13. ICC 14 Pre-Symposium Best Poster Award

    2008.7  

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    Country:Japan

  14. 第101回触媒討論会優秀ポスター賞

    2008.3  

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    Country:Japan

  15. 金属組織写真賞

    2001  

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  16. International Metallographic Contest

    1993  

  17. 金属組識写真賞

    1993  

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Papers 217

  1. Magnetic measurements with atomic plane resolution Reviewed

    J. Rusz, S. Muto, J. Spiegelberg, R. Adam, K. Tatsumi, D. E. Burgler, P. M. Oppeneer, C. M. Schneider

    Nature Communications   Vol. 7   page: 12672   2016.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/ncomms12672

  2. Quantitative characterisation of nanoscale polycrystalline magnets with electron magnetic circular dichroism Reviewed

    Shunsuke Muto, Ján Rusz, Kazuyoshi Tatsumi, Roman Adam, Shigeo Arai, Vancho Kocevski, Peter M. Oppeneer, Daniel E. Bürgler & Claus M. Schneider

    Nature Communications   Vol. 5 ( 3138 ) page: 1-7   2014.1

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    Electron magnetic circular dichroism (EMCD) allows the quantitative, element-selective determination of spin and orbital magnetic moments, similar to its well-established X-ray counterpart, X-ray magnetic circular dichroism (XMCD). As an advantage over XMCD, EMCD measurements are made using transmission electron microscopes, which are routinely operated at sub-nanometre resolution, thereby potentially allowing nanometre magnetic characterization. However, because of the low intensity of the EMCD signal, it has not yet
    been possible to obtain quantitative information from EMCD signals at the nanoscale. Here we demonstrate a new approach to EMCD measurements that considerably enhances the outreach of the technique. The statistical analysis introduced here yields robust quantitative EMCD signals. Moreover, we demonstrate that quantitative magnetic information can be
    routinely obtained using electron beams of only a few nanometres in diameter without imposing any restriction regarding the crystalline order of the specimen.

    DOI: DOI: 10.1038/ncomms4138

  3. Spin crossover and iron-rich silicate melt in the Earth's deeep mantle Reviewed

    R.Nomura, H.Ozawa, S.Tateno, K.Hirose, J.Hernlund, S.Muto, H.Ishii and N.Hiraoka

    NATURE   Vol. 473   page: 199-202   2011.5

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  4. *Novel valence state of cerium in Ce2Zr2O7.5 elucidated by electron energy-loss spectroscopy under electron channeling conditions Reviewed

    S. Arai, S. Muto, T. Sasaki, K. Tatsumi, Y. Ukyo, K. Kuroda and H. Saka

    Solid State Communications   Vol. 135   page: 664-667   2005

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    In the present study, we show, by electron energy loss spectroscopy (EELS) measurements under electron channeling conditions, the existence of a novel valence state for the cerium atoms in Ce2Zr2O7.5, where the valence state is split into two states, with the ions exhibiting a trivalent character (Ce3+) when facing oxygen planes with oxygen vacancies, and a tetravalent character (Ce4+) when facing oxygen planes with no oxygen vacancies. This result should prompt reconsideration of the conventional concept of the valence fluctuation in rare earth compounds.

  5. *Local electronic structure analysis by site-selective ELNES using electron channeling and first-principles calculations Invited Reviewed

    K. Tatsumi and S. Muto

    J. Phys.: Condens. Matter   Vol. 21   page: 104213 (14 pages)   2009

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  6. Site-specific electronic configurations of Fe 3d states by energy loss by channeled electrons Reviewed

    K. Tatsumi, S. Muto, I. Nishida and J. Rusz

    Applied Physics Letters   Vol. 96   page: 201911 (3 pages)   2010.4

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    Site-specific configurations of Fe 3d electrons in a spinel ferrite were investigated by electron energy loss spectroscopy (EELS) under electron channeling conditions. Site-specific spectra were extracted by applying a multivariate curve resolution (MCR) technique to the data set. An electronic difference in the Fe sites caused by ligand field splitting of trivalent Fe was probed. This demonstrated the promise of site-specific valence and spin state analysis in spintronics applications of spinel ferrites.

  7. *Spectral restoration and energy resolution improvement of electron energy-loss spectra by Pixon reconstruction: I. Principle and test examples Reviewed

    S. Muto, R. C. Puetter and K. Tatsumi

    Journal of Electron Microscopy   Vol. 55   page: 215-223   2006

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    We applied Pixon deconvolution as introduced in Part I to several practical, examples of low signal-to-noise ratio (SNR), electron energy-loss spectra with a goal toward restoring their fine spectral features and/or improving the energy resolution. We demonstrate that by directly fitting the two-dimensional spectral data recorded on the CCD; the method enables us to reveal fine spectral structures. Consequently, Pixon reconstruction extends the ability to probe electronic states in very spatially localized areas, a capability currently unique to our method.

  8. Mapping of heterogeneous chemical states of lithium in a LiNiO2-based active material by electron energy-loss spectroscopy Reviewed

    S. Muto, K. Tatsumi, T. Sasaki, H. Kondo, T. Ohsuna, K. Horibuchi and Y. Takeuchi

    Electrochemical Solid-State Letters   Vol. 13 ( 8 ) page: A115-117   2010.5

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    It is difficult to analyze the local concentrations and chemical states of lithium in lithium-ion secondary battery electrodes by microanalysis techniques based on TEM because the core excitation spectra of transition metals invariably overlap with the absorption/emission spectra of Li-K. We propose a promising analysis method that enables the spatial distribution of lithium with different chemical states from the original phase in a LiNiO2-based positive electrode to be visualized. It employs a suite of spectrum imaging techniques including scanning transmission electron microscopy, electron energy-loss spectroscopy, and multivariate curve resolution. This method is successfully applied to a cross-sectioned positive electrode.

  9. Detection of hydrogen at localized regions by unoccupied electronic states in iron carbides: towards high spatial resolution mapping of hydrogen distributions Reviewed

    K. Tatsumi, S. Muto and T. Yoshida

    Journal of Applied Physics   Vol. 101   page: 023523-1-7   2007

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    In the present study, we examined the effects of hydrogen on electron energy-loss and x-ray absorption spectra of the iron carbides. The experimentally obtained spectral changes were interpreted on the basis of first principles
    calculations for a model structure of the Fe–C–H system. Finally, we demonstrate high spatial resolution imaging of hydrogen distributions in iron-carbon systems by an energy-filtering transmission electron microscopy technique, utilizing the present spectral changes associated with
    hydrogen incorporation.

  10. 電子エネルギー損失スペクトル微細構造解析の軽元素分析への応用 Invited Reviewed

    武藤 俊介

    顕微鏡   Vol. 41 ( 1 ) page: 26-31   2006.3

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    本論文はエネルギー損失分光法(EELS)の優位性を生かし,ELNES,EXELFSを利用してとりわけ軽元素原子の複合欠陥やその結合状態の分析についての様々な応用例を紹介する.

  11. Local atomic and electronic structures around Mg and Al dopants in LiNiO2 electrodes studied by XANES and ELNES and first-principles calculations Reviewed

    K. Tatsumi, Y. Sasano, S. Muto, T. Yoshida, T. Sasaki, K. Horibuchi, Y. Takeuchi and Y. Ukyo

    Physical Review B   Vol. 78   page: 045108(1-8)   2008.7

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    We investigated the local atomic and electronic structures around the dopants Mg and Al in a LiNiO2-based cathode material by the combination analysis of their K shell electron energy loss near edge structures (ELNES) and x-ray absorption near edge structures (XANES), and first-principles calculations. The occupation sites of the dopants in initial and cycled samples were examined. On the basis of the atomic structures and chemical bonding states of the models whose theoretical spectra were most consistent with the experimental spectra, we discussed the effects of Al and Mg on Li diffusion and their roles in suppressing the degradation of battery properties.

  12. Hydrogen trapping state associated with the low temperature thermal desorption spectroscopy peak in hydrogenated nanostructured graphite Reviewed

    Y. Miyabe, T. Yoshida, S. Muto, T. Kiyobayashi and H. Wasada

    Journal of Applied Physics   Vol. 104   page: 044311   2008.4

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  13. Quantitative determination of site occupancy of multi-rare-earth elements doped into Ca2SnO4 phosphor by electron channeling microanalysis Reviewed

    Y. Fujimichi, S. Muto, K. Tatsumi, T. Kawano and H. Yamane

    journal of Solid State Chemistry   Vol. 183   page: 2127-2132   2010.8

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  14. Capacity fading mechanism of LiNiO2-based lithium ion batteries: II. Diagnostic analysis by electron microscopy and spectroscopy Reviewed

    S. Muto, Y. Sasano, K. Tatsumi, T. Sasaki, K. Horibuchi, Y. Takeuchi and Y. Ukyo

    J. Electrochem. Soc.   Vol. 156   page: A371-A377   2009.4

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  15. Grazing-incidence electron microscopy of surface blisters in single- and polycrystalline tungsten formed by H+, D+ and He+ irradiation Reviewed

    N. Enomoto, S. Muto, T. Tanabe, J. W. Davis and A. A. Haasz

    J. Nucl. Mater.   Vol. 385   page: 606-614   2009

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  16. 2D-HARECXS analysis of dopant and oxygen vacancy sites in Al-doped yttrium titanate Reviewed

    M. Ohtsuka, K. Oda, M. Tanaka, S. Kitaoka, S. Muto

    Journal of the American Ceramic Society     2021.3

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    DOI: 10.1111/jace.17764

  17. Preparation of silver-decorated Soluplus (R) nanoparticles and antibacterial activity towards S. epidermidis biofilms as characterized by STEM-CL spectroscopy Reviewed

    Takahashi Chisato, Yamada Tomomi, Yagi Shinya, Murai Takaaki, Muto Shunsuke

    MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS   Vol. 119   page: 111718   2021.2

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    DOI: 10.1016/j.msec.2020.111718

    Web of Science

  18. Electron and Ion Transfer across Interfaces of the NASICON-Type LATP Solid Electrolyte with Electrodes in All-Solid-State Batteries: A Density Functional Theory Study via an Explicit Interface Model Reviewed

    Tian Hong-Kang, Jalem Randy, Gao Bo, Yamamoto Yuta, Muto Shunsuke, Sakakura Miyuki, Iriyama Yasutoshi, Tateyama Yoshitaka

    ACS APPLIED MATERIALS & INTERFACES   Vol. 12 ( 49 ) page: 54752 - 54762   2020.12

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    DOI: 10.1021/acsami.0c16463

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  19. Core–Shell Double Doping of Zn and Ca on β-Ga 2 O 3 Photocatalysts for Remarkable Water Splitting Reviewed

      Vol. 11   page: 1911 - 1919   2020.12

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    DOI: 10.1021/acscatal.0c05104

  20. スペクトラムイメージデータのノイズ処理と信号抽出の最近の進展 Invited Reviewed

    武藤俊介, 志賀元紀

    顕微鏡   Vol. 55 ( 2 ) page: 60 - 64   2020.8

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  21. Application of machine learning techniques to electron microscopic/spectroscopic image data analysis Invited Reviewed

    Muto Shunsuke, Shiga Motoki

    MICROSCOPY   Vol. 69 ( 2 ) page: 110 - 122   2020.4

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    DOI: 10.1093/jmicro/dfz036

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  22. Evolution from UV emission of phenyl groups to visible emission of pyrolytic nanocarbons dispersed in fumed silica: Alternative insight into photoluminescence of carbon nanodots

    Vasin A. V, Muto S, Ishikawa Y, Kysil D. V, Sevostianov S. V, Isaieva O. F, Rudko G. Yu, Yatskiv R, Starik S, Tertykh V. A, Nazarov A. N, Lysenko V. S

    JOURNAL OF LUMINESCENCE   Vol. 219   2020.3

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    DOI: 10.1016/j.jlumin.2019.116926

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  23. Measurement of nanoscale local stress distribution in phase-separated glass using scanning transmission electron microscopy-cathodoluminescence

    Yamada Taiki, Ohtsuka Masahiro, Takahashi Yoshimasa, Yoshino Haruhiko, Amma Shin-ichi, Muto Shunsuke

    MATERIALIA   Vol. 9   2020.3

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    DOI: 10.1016/j.mtla.2019.100578

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  24. Methods for Calibration of Specimen Temperature During In Situ Transmission Electron Microscopy Experiments

    Gaulandris Fabrizio, Simonsen Soren B, Wagner Jakob B, Molhave Kristian, Muto Shun, Kuhn Luise T

    MICROSCOPY AND MICROANALYSIS   Vol. 26 ( 1 ) page: 3 - 17   2020.2

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    DOI: 10.1017/S1431927619015344

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  25. STEM-EELS analysis of the interface structures of composite ASS-LIB electrodes fabricated via aerosol deposition

    Yamamoto Yuta, Iriyama Yasutoshi, Muto Shunsuke

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   Vol. 103 ( 2 ) page: 1454 - 1462   2020.2

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

    DOI: 10.1111/jace.16813

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  26. Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods

    Thersleff Thomas, Schonstrom Linus, Tai Cheuk-Wai, Adam Roman, Burgler, Daniel E, Schneider Claus M, Muto Shunsuke, Rusz Jan

    SCIENTIFIC REPORTS   Vol. 9   2019.12

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

    DOI: 10.1038/s41598-019-53373-1

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  27. Interfacial oxygen vacancies yielding long-lived holes in hematite mesocrystal-based photoanodes

    Zhang Zhujun, Karimata Izuru, Nagashima Hiroki, Muto Shunsuke, Ohara Koji, Sugimoto Kunihisa, Tachikawa Takashi

    NATURE COMMUNICATIONS   Vol. 10   2019.10

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    DOI: 10.1038/s41467-019-12581-z

    Web of Science

  28. Non-negative Matrix Factorization and Its Extensions for Spectral Image Data Analysis

    Shiga Motoki, Muto Shunsuke

    E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY   Vol. 17   page: 148 - 154   2019.9

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    DOI: 10.1380/ejssnt.2019.148

    Web of Science

  29. Environmental high-voltage S/TEM combined with a quadrupole mass spectrometer for concurrent in situ structural characterization and detection of product gas molecules associated with chemical reactions Reviewed

    S. Muto, S. Arai, T. Higuchi, K. Orita, S. Ohta, H. Tanaka, T. Suganuma, M. Ibe, H. Hirata

    Microscopy   Vol. 68 ( 2 ) page: 185 - 188   2019.4

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    DOI: 10.1093/jmicro/dfy141

    Web of Science

  30. Twinned/untwinned catalytic gold nanoparticles identified by applying a convolutional neural network to their Hough transformed Z-contrast images (vol 67, pg 321, 2018) Reviewed

    Yamamoto Yuta, Hattori Mizuki, Ohyama Junya, Satsuma Atsushi, Tanaka Nobuo, Muto Shunsuke

    MICROSCOPY   Vol. 68 ( 2 ) page: 194 - 194   2019.4

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    DOI: 10.1093/jmicro/dfz008

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  31. Proposal for Measuring Magnetism with Patterned Apertures in a Transmission Electron Microscope Reviewed

    S. Muto, S. Arai, T. Higuchi, K. Orita, S. Ohta, H. Tanaka, T. Suganuma, M. Ibe, H. Hirata

    PHYSICAL REVIEW LETTERS   Vol. 122 ( 3 ) page: 037201   2019.1

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    DOI: 10.1103/PhysRevLett.122.037201

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  32. Analysis of evolution of electron-radiation-induced defects in white-luminescent, carbonized,mesoporous silica nanocomposite using transmission electron microscopy/cathodoluminescence Reviewed

    K. Oguni, K. Sato, Y. Ishii, Y. Ishikawa, S. Kawasaki, A. Vasin, S. Muto

    Nuclear Inst. And Methods in Physics Research B   Vol. 439   page: 22 - 33   2019.1

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    DOI: 10.1016/j.nimb.2018.11.007

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  33. Twinned/untwinned catalytic gold nanoparticles identified by applying a convolutional neural network to their Hough transformed Z-contrast images Reviewed

    Y. Yamamoto, M. Hattori, J. Ohyama, A. Satsuma, N. Tanaka, S. Muto

    Microscopy   Vol. 67 ( 6 ) page: 321 - 330   2018.12

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    DOI: 10.1093/jmicro/dfy036

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  34. MC3T3-E1 Cellular Response and Protein Detection on Surface Potential-Controlled TiO2 Scale in Serum-Containing Medium Reviewed

    M. Hashimoto, T. Ogawa, S. Kitaoka, S. Muto, M. Furuya, H. Kanetaka, M. Abe, H. Yamashita

    Key Engineering Materials   Vol. 782   page: 218-223   2018.10

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    DOI: 10.4028/www.scientific.net/KEM.782.218

  35. Cation mixing in LiNi0.8Co0.15Al0.05O2 positive electrode material studied using high angular resolution electron channeling X-ray spectroscopy Reviewed

    Yamamoto Yu, Ohtsuka Masahiro, Azuma Yosuke, Takahashi Teruo, Muto Shunsuke

    JOURNAL OF POWER SOURCES   Vol. 401   page: 263 - 270   2018.10

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    DOI: 10.1016/j.jpowsour.2018.08.100

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  36. Progress in nanoinformatics and informational materials science Invited Reviewed

    Seko Atsuto, Toyoura Kazuaki, Muto Shunsuke, Mizoguchi Teruyasu, Broderick Scott

    MRS BULLETIN   Vol. 43 ( 9 ) page: 690 - 695   2018.9

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    DOI: 10.1557/mrs.2018.206

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  37. Control of surface potential and hydroxyapatite formation on TiO2 scales containing nitrogen-related defects Reviewed

    Masami Hashimoto, Takafumi Ogawa, Satoshi Kitaoka, Shunsuke Muto, Maiko Furuya, Hiroyasu Kanetaka, Masayuki Abe, Hayato Yamashita

    Acta Materialia   Vol. 155   page: 379 - 385   2018.8

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    The hydroxyapatite (HAp) formation ability and related surface potentials of rutile-type TiO2 scales formed on Ti are controlled by varying the Ti heat treatment conditions in a N2 atmosphere containing a trace amount of O2. The zeta potentials of the samples heated at 873 and 973 K for 1 h are large negative and positive values, respectively, where HAp formation on the surface is enhanced in both cases. Upon longer heat treatment at those temperatures, the HAp forming ability diminishes and the zeta potential becomes more neutral. Kelvin probe force microscopy indicates that, under dry conditions, the surface charges on the TiO2 scales formed at 873 and 973 K in 1 h are positive and negative, respectively, opposite to the signs of the zeta potentials measured under wet conditions. Scanning transmission electron microscopy, electron energy loss spectroscopy, and calculations of defect formation energies reveal that nitrogen atoms incorporated into TiO2 during scale formation produce the charged defects (NO)O −1 and (N2)O +2 for the scales formed in 1 h at 873 and 973 K, respectively. In the case of longer treatments, nitrogen-related defects presumably transform into more stable states, such as N2 gas, in voids, resulting in a neutral surface. The present findings lead to physical models of surface charge distributions that elucidate the relationship between nitrogen-related defects, charged surfaces, and HAp formation mechanisms.

    DOI: 10.1016/j.actamat.2018.05.072

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    Scopus

  38. EPR Study of Porous Si:C and SiO2:C Layers

    Dariya Savchenko, Andrii Vasin, Shunsuke Muto, Ekaterina Kalabukhova, Alexei Nazarov

    Physica Status Solidi (B) Basic Research   Vol. 255 ( 6 )   2018.6

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    Initial porous silicon (por-Si), carbonized porous silicon (por-Si:C), and carbon-incorporated porous silicon oxide (por-SiO2:C) layers are studied by electron paramagnetic resonance (EPR) at T = 10–13 K. Scanning transmission electron microscopy and electron energy loss (EEL) spectroscopy show that por-Si:C and por-SiO2:C layers have a highly disordered structure with mixing sp2 and sp3 CC bonds. In the por-SiO2:C layers, the peak of the oxygen bonded to carbon in the form of hydroxyl groups is found in the EEL spectrum of the C K-edge region. Low-intensity signals of Lorentzian lineshape are detected in the EPR spectrum of por-Si, por-Si:C, por-SiO2:C layers. One of them is attributed to the Pb0 defect at the Si/SiO2 interface of nanocrystalline grain and the second to the silicon dangling bonds (SiDB) localized in nanocrystalline Si. The carbonization of por-Si layers and subsequent oxidation of por-Si:C gives rise to the appearance of additional EPR signals of high intensity at g = 2.0035(3) in por-Si:C and at g = 2.0030(3) in por-SiO2:C, which are assigned to carbon-related defects (CRD) and carbon clusters, correspondingly. It was found that predominant defect types in por-Si:C and por-SiO2:C layers are CRD and carbon clusters, respectively, while the spin concentration of Pb0 interface defects and SiDB is low.

    DOI: 10.1002/pssb.201700559

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    Scopus

  39. Interfacial fracture strength evaluation of Cu/SiN micro-components: applicability of the linear fracture mechanics criterion under a hydrogen environment Reviewed

    Yoshimasa Takahashi, Itaru Ashida, Shigeo Arai, Kimitaka Higuchi, Yuta Yamamoto, Shunsuke Muto

    International Journal of Fracture   Vol. 210 ( 1-2 ) page: 223 - 231   2018.3

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    The strength against fracture initiation from an interface free-edge of bonded copper (Cu) and silicon nitride (SiN) micro-components is studied. Quantitative fracture tests are conducted either in a vacuum environment or in a gaseous hydrogen (H2) environment. By using two kinds of specimens, Types I and II, having the same free-edge geometry (135∘/135∘) but different outer shape, the validity of the linear fracture mechanics criterion is critically evaluated. For specimens tested in vacuum, fracture initiation strength represented by the elastic stress intensity factor of the near-edge normal stress component is found to be the same irrespective of the specimen type, indicating that the fracture mechanics criterion holds. For specimens tested in H2 gas, the strength of both types is reduced and, interestingly, Type II strength shows greater reduction than Type I. In other words, the fracture mechanics criterion does not hold in H2 gas. Such a difference may be attributable to the difference of local plasticity in each specimen type.

    DOI: 10.1007/s10704-018-0269-8

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    Scopus

  40. Evaluation of delamination strength of bonded micro-components: a nano-indenter technique combined with environmental microscopy

    Takahashi Yoshimasa, Kishimoto Kaname, Higuchi Kimitaka, Yamamoto Yuta, Arai Shigeo, Muto Shunsuke

    2018 INTERNATIONAL SYMPOSIUM ON MICRO-NANOMECHATRONICS AND HUMAN SCIENCE (MHS)     page: .   2018

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  41. Unmixing hyperspectral data by using signal subspace sampling

    Jakob Spiegelberg, Shunsuke Muto, Masahiro Ohtsuka, Kristiaan Pelckmans, Jan Rusz

    ULTRAMICROSCOPY   Vol. 182   page: 205 - 211   2017.11

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    This paper demonstrates how Signal Subspace Sampling (SSS) is an effective pre-processing step for Non-negative Matrix Factorization (NMF) or Vertex Component Analysis (VCA). The approach allows to uniquely extract non-negative source signals which are orthogonal in at least one observation channel, respectively. It is thus well suited for processing hyperspectral images from X-ray microscopy, or other emission spectroscopies, into its non-negative source components. The key idea is to resample the given data so as to satisfy better the necessity and sufficiency conditions for the subsequent NMF or VCA. Results obtained both on an artificial simulation study as well as based on experimental data from electronmicroscopy are reported. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.ultramic.2017.07.009

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  42. A microscopy method for scanning transmission electron microscopy imaging of the antibacterial activity of polymeric nanoparticles on a biofilm with an ionic liquid

    Chisato Takahashi, Shunsuke Muto, Hiromitsu Yamamoto

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS   Vol. 105 ( 6 ) page: 1432 - 1437   2017.8

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    In this study, we developed a scanning transmission electron microscopy (STEM) method for imaging the antibacterial activity of organic polymeric nanoparticles (NPs) toward biofilms formed by Staphylococcus epidermidis bacterial cells, for optimizing NPs to treat biofilm infections. The combination of sample preparation method using a hydrophilic ionic liquid (IL) and STEM observation using the cooling holder eliminates the need for specialized equipment and techniques for biological sample preparation. The annular dark-field STEM results indicated that the two types of biodegradable poly-(DL-lactide-co-glycolide) (PLGA) NPs: PLGA modified with chitosan (CS), and clarithromycin (CAM)loaded+CS-modified PLGA, prepared by emulsion solvent diffusion exhibited different antibacterial activities in nanoscale. To confirm damage to the sample during STEM obser-vation, we observed the PLGA NPs and the biofilm treated with PLGA NPs by both the conventional method and the newly developed method. The optimized method allows microstructure of the biofilm treated with PLGA NPs to be maintained for 25 min at a current flow of 40 pA. The developed simple sample preparation method would be helpful to understand the interaction of drugs with target materials. In addition, this technique could contribute to the visualization of other deformable composite materials at the nanoscale level. (C) 2016 Wiley Periodicals, Inc.

    DOI: 10.1002/jbm.b.33680

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  43. High-precision quantitative atomic-site-analysis of functional dopants in crystalline materials by electron-channelling-enhanced microanalysis

    Shunsuke Muto, Masahiro Ohtsuka

    PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION OF MATERIALS   Vol. 63 ( 2 ) page: 40 - 61   2017.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Knowledge of the location and concentration of impurity atoms doped into a synthesized material is of great interest to investigate the effect of doping. This would usually be investigated using X-ray or neutron diffraction methods in combination with Rietveld analysis. However, this technique requires a large-scale facility such as a synchrotron radiation source and nuclear reactor, and can sometimes fail to produce the desired results, depending on the constituent elements and the crystallographic conditions that are being analysed. Thus, it would be preferable to use an element-selective spectroscopy technique that is applicable to any combination of elements. We have established a quantitative method to deduce the occupation sites and their occupancies, as well as the site-dependent chemical states of the doped elements, using a combination of transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, and electron energy-loss spectroscopy (EELS). The method is based on electron channelling phenomena where the symmetries of the Bloch waves excited in a crystal are dependent on the diffraction condition or incident beam direction with respect to the crystal axes. By rocking the incident electron beam with a fixed pivot point on the sample surface, a set of EDX/EELS spectra are obtained as a function of the beam direction. This is followed by a statistical treatment to extract the atom-site-dependent spectra, thereby quantitatively enabling the estimation of the site occupancies and chemical states of the dopants. This is an extension of the 'ALCHEMI' (Atom Location by Channelling Enhanced Microanalysis) method or 'HARECXS/HARECES' (High Angular Resolution Channelled X-ray/Electron Spectroscopy), and we further extended the method to be applicable to cases where the crystal of interest contains multiple inequivalent atomic sites for a particular element, applying the precise spectral predictions based on electron elastic/inelastic dynamical scattering theory. After introduction of conceptual aspects of the method, we describe the extension of the method together with the development of the theoretical calculation method. We then demonstrate several useful applications of the method, including luminescent, ferrite, and battery materials. We discuss the advantages and drawbacks of the present method, compared with those of the recently developed atomic column-by-column analysis using aberration-corrected scanning TEM and high-efficiency X-ray detectors. (C) 2017 Elsevier Ltd. All rights reserved

    DOI: 10.1016/j.pcrysgrow.2017.02.001

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  44. Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution

    Jan Rusz, Jakob Spiegelberg, Shunsuke Muto, Thomas Thersleff, Masahiro Ohtsuka, Klaus Leifer, Peter M. Oppeneer

    PHYSICAL REVIEW B   Vol. 95 ( 17 )   2017.5

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    Inelastic electron scattering is a consequence of mostly Coulomb interaction between electrons in the sample and electron beam and, as such, it is a nonlocal event. In atomic resolution experiments, it thus opens the following question: How far is the origin of the inelastic scattering signal that is observed when the electron beam is passing nearby an atomic column or plane? We analyze computationally the delocalization of the magnetic signal in electron magnetic circular dichroism (EMCD) experiments in the so-called three-beam orientation, allowing one to image individual atomic planes. We compare the classical EMCD setup using the double-difference procedure (DD-EMCD) to a recently introduced atomic plane resolution EMCD (APR-EMCD) geometry, assuming the same probe size. We observe a strong localization of the EMCD signal to the closest atomic plane, confirming the potential of EMCD to study an evolution of magnetic properties near surfaces or interfaces with atomic plane resolution. The localization of the EMCD signal is remarkably higher than the localization of the nonmagnetic component of the inelastic scattering cross section. We also analyze double-channeling effects and find them particularly strong for the DD-EMCD method, while for APR-EMCD they appear to be minor. The DD-EMCD signal, on the other hand, appears to be more robust with respect to sample thickness than that of the APR-EMCD.

    DOI: 10.1103/PhysRevB.95.174412

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  45. Microscopic origin of ultra-low friction coefficient between the wear track formed on carbon nitride coating and transfer layer on sliding ball in friction tests under dry N-2

    Hiroshi Inoue, Shunsuke Muto, Shigeo Arai, Hiroaki Wasada, Noritsugu Umehara

    SURFACE & COATINGS TECHNOLOGY   Vol. 313   page: 31 - 39   2017.3

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    Carbon nitride (CN) coatings have been found to exhibit an ultra-low friction coefficient (less than 0.01) after repeated sliding against a silicon nitride (Si3N4) ball in a dry nitrogen gas (N-2) atmosphere. However, the mechanism for this has not yet been fully elucidated with respect to analyzing changes in the space structure of CNN. In the present study, we examined the microscopic structural changes in the near-surface structural transition layers of the wear track in the CN, coating and the transfer layer of the Si3N4 ball, using scanning transmission electron microscopy and electron energy-loss spectroscopy. We investigated the nitrogen concentration, density, and curvature of fragmented graphitic planes in the structural transition layers of both the CN,, coating and the transfer layer of the Si3N4 ball by analyzing the plasmon peak and carbon K-edge. In addition, we theoretically examined the chemical bonding states of nitrogen doping in various model clusters using an ab initio molecular orbital method to clarify the role of nitrogen in the ultra -low friction behavior. The mechanism behind the ultra low friction behavior is explained by nano-graphitization of the fragmented carbon structure with optimal nitrogen concentration passivating the contacting counter surfaces of the coating and ball formed during sliding. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.surfcoat.2017.01.048

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  46. Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface

    Thomas Thersleff, Shunsuke Muto, Miroslaw Werwinski, Jakob Spiegelberg, Yaroslav Kvashnin, Bjorgvin Hjorvarsson, Olle Eriksson, Jan Rusz, Klaus Leifer

    SCIENTIFIC REPORTS   Vol. 7   2017.3

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    While the performance of magnetic tunnel junctions based on metal/oxide interfaces is determined by hybridization, charge transfer, and magnetic properties at the interface, there are currently only limited experimental techniques with sufficient spatial resolution to directly observe these effects simultaneously in real-space. In this letter, we demonstrate an experimental method based on Electron Magnetic Circular Dichroism (EMCD) that will allow researchers to simultaneously map magnetic transitions and valency in real-space over interfacial cross-sections with sub-nanometer spatial resolution. We apply this method to an Fe/MgO bilayer system, observing a significant enhancement in the orbital to spin moment ratio that is strongly localized to the interfacial region. Through the use of first-principles calculations, multivariate statistical analysis, and Electron Energy-Loss Spectroscopy (EELS), we explore the extent to which this enhancement can be attributed to emergent magnetism due to structural confinement at the interface. We conclude that this method has the potential to directly visualize spin and orbital moments at buried interfaces in magnetic systems with unprecedented spatial resolution.

    DOI: 10.1038/srep44802

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  47. Detection of local chemical states of lithium and their spatial mapping by scanning transmission electron microscopy, electron energy-loss spectroscopy and hyperspectral image analysis Reviewed

    Shunsuke Muto, Kazuyoshi Tatsumi

    MICROSCOPY   Vol. 66 ( 1 ) page: 39 - 49   2017.2

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    Advancements in the field of renewable energy resources have led to a growing demand for the analysis of light elements at the nanometer scale. Detection of lithium is one of the key issues to be resolved for providing guiding principles for the synthesis of cathode active materials, and degradation analysis after repeated use of those materials. We have reviewed the different techniques currently used for the characterization of light elements such as high-resolution transmission electron microscopy, scanning transmission electron microscopy ( STEM) and electron energy-loss spectroscopy (EELS). In the present study, we have introduced a methodology to detect lithium in solid materials, particularly for cathode active materials used in lithium-ion battery. The chemical states of lithium were isolated and analyzed from the overlapping multiple spectral profiles, using a suite of STEM, EELS and hyperspectral image analysis. The method was successfully applied in the chemical state analyses of hetero-phases near the surface and grain boundary regions of the active material particles formed by chemical reactions between the electrolyte and the active materials.

    DOI: 10.1093/jmicro/dfw038

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  48. High-precision quantitative atomic-site-analysis of functional dopants in crystalline materials by electron-channelling-enhanced microanalysis Reviewed

    S. Muto, M. Ohtsuka

    Progress in Crystal Growth and Characterization of Materials   Vol. 63   page: 40-61   2017

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  49. Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution Reviewed

    J. Rusz, J. Spiegelberg, S. Muto, T. Thersleff, M. Ohtsuka, K. Leifer, P. M. Oppeneer

    PHYSICAL REVIEW B   Vol. 95   page: 174412   2017

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  50. In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum-cation diffusion observations Reviewed

    F. Gualandris, S. B. Simonsen, J. B. Wagner, S. Sanna, S. Muto, L. Theil Kuhn

    ECS Transactions   Vol. 75   page: 123-133   2017

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  51. Microscopic origin of ultra-low friction coefficient between the wear track formed on carbon nitride coating and transfer layer on sliding ball in friction tests under dry N2 Reviewed

    H. Inoue, S. Muto, S. Arai, H. Wasada, N. Umehara

    Surface &Coating Technology   Vol. 313   page: 31-39   2017

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  52. Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface Reviewed

    T. Thersleff, S. Muto, M. Werwinski, J. Spiegelberg, Y. Kvashnin, B. Hjorvarsson, O. Eriksson, J. Rusz, K. Leifer

    SCIENTIFIC REPORTS   Vol. 7   page: 44802   2017

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  53. Unmixing hyperspectral data by using signal subspace sampling Reviewed

    J. Spiegelberg, S. Muto, M. Ohtsuka, K. Pelckmans, J. Rusz

    Ultramicroscopy   Vol. 182   page: 205-211   2017

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  54. Control of HAp Formation and Osteoconductivity on Nitrogen-Doped TiO2 Scale Formed by Oxynitridation of Ti Reviewed

    M. Hashimoto, S. Kitaoka, Y. Obata, S. Muto, T. Ogawa, M. Furuya, H. Kanetaka

    Key Engineering Materials   Vol. 758   page: 86-89   2017

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  55. In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum cation diffusion observations

    Gualandris F., Simonsen S. B., Wagner J. B., Sanna S., Muto S., Kuhn L. Theil

    SOLID STATE IONIC DEVICES 11   Vol. 75 ( 42 ) page: 123-133   2017

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    DOI: 10.1149/07542.0123ecst

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  56. Control of HAp Formation and Osteoconductivity on Nitrogen-Doped TiO2 Scale Formed by Oxynitridation of Ti Reviewed

    M. Hashimoto, S. Kitaoka, Y. Obata, S. Muto, T. Ogawa, M. Furuya, H. Kanetaka

    Key Engineering Materials   Vol. 758   page: 86-89   2017

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  57. Unmixing hyperspectral data by using signal subspace sampling Reviewed

    J. Spiegelberg, S. Muto, M. Ohtsuka, K. Pelckmans, J. Rusz

    Ultramicroscopy   Vol. 182   page: 205-211   2017

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  58. Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface Reviewed

    T. Thersleff, S. Muto, M. Werwinski, J. Spiegelberg, Y. Kvashnin, B. Hjorvarsson, O. Eriksson, J. Rusz, K. Leifer

    SCIENTIFIC REPORTS   Vol. 7   page: 44802   2017

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  59. Microscopic origin of ultra-low friction coefficient between the wear track formed on carbon nitride coating and transfer layer on sliding ball in friction tests under dry N2 Reviewed

    H. Inoue, S. Muto, S. Arai, H. Wasada, N. Umehara

    Surface &Coating Technology   Vol. 313   page: 31-39   2017

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

  60. Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution Reviewed

    J. Rusz, J. Spiegelberg, S. Muto, T. Thersleff, M. Ohtsuka, K. Leifer, P. M. Oppene

    PHYSICAL REVIEW B   Vol. 95   page: 174412   2017

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

  61. In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum-cation diffusion observations Reviewed

    F. Gualandris, S. B. Simonsen, J. B. Wagner, S. Sanna, S. Muto, L. Theil Kuhn

    ECS Transactions   Vol. 75   page: 123-133   2017

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

  62. High-precision quantitative atomic-site-analysis of functional dopants in crystalline materials by electron-channelling-enhanced microanalysis Reviewed

    S. Muto, M. Ohtsuka

    Progress in Crystal Growth and Characterization of Materials   Vol. 63   page: 40-61   2017

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  63. Sparse modeling of EELS and EDX spectral imaging data by nonnegative matrix factorization Reviewed

    M. Shiga, K. Tatsumi, S. Muto, K. Tsuda, Y. Yamamoto, T. Mori, T. Tanji

    Ultramicroscopy   Vol. 170   page: 43-59   2016.8

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    DOI: 10.1016/j.ultramic.2016.08.006

  64. Structure analysis of topmost Layer of CNx after repeated sliding using scanning transmission electron microscopy electron energy-loss spectroscopy Reviewed

    H. Inoue, S. Muto, X. Deng, S. Arai, N. Umehara

    Thin Solid Films   Vol. 616   page: 134-140   2016

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    DOI: 10.1016/j.tsf.2016.08.014

  65. A microscopy method for scanning transmission electron microscopy imaging of the antibacterial activity of polymeric nanoparticles on a biofilm with an ionic liquid Reviewed

    C. Takahashi, S. Muto, H. Yamamoto

    Journal of Biomedical Materials Research Part B:Applied Biomaterials   Vol. 500   2016

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    DOI: 10.1002/jbm.b.33680.

  66. Quantitative analysis of cation mixing and local valence states in LiNixMn2-xO4 using concurrent HARECXS and HARECES measurements Reviewed

    Y. Yamamoto, K. Kataoka, J. Akimoto, K. Tatsumi, T. Kousaka, J. Ohnishi, T. Takahashi, S. Muto

    Microscopy   Vol. 65   page: 253-262   2016

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    DOI: doi:0.1093/jmicro/dfw008

  67. Multicomponent A-site ordered perovskite BiMn3(Fe0.25Ti0.75)4O12 : High-pressure synthesis, crystal Chemistry and magnetic behavior Reviewed

    G. Shimura, K.Nowa, Y. Shirako, S. Muto, K. Kusaba, M. Hasegawa

    Solid State Communications   Vol. 234-235   page: 40-44   2016

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    DOI: Solid State Communications

  68. The microstructure of scale formed by oxynitriding of Ti and exhibiting significant apatite-forming ability Reviewed

    M. Hashimoto, S. Kitaoka, S. Muto, K. Kazuyoshi, Y. Obata

    Journal of Materials Research   Vol. 31   page: 1004-1011   2016

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    DOI: DOI: 10.1557/jmr.2016.79

  69. Union operation image processing of data cubes separately processed by different objective filters and its application to void analysis in an all-solid-state lithium-ion battery Reviewed

    Y. Yamamoto, Y. Iriyama, S. Muto

    Microscopy   Vol. 65   page: 191-198   2016

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    DOI: DOI:10.1093/jmicro/dfv373

  70. Quantitative determination of occupation sites trace CO substituted for multiple Fe sites in M-type hexagonal ferrite using statistical beam-rocking TEM-EDXS analysis Reviewed

    M.Ohtsuka, S. Muto, K. Tatsumi, Y. Kobayashi, T. Kawata

    Microscopy   Vol. 65   page: 127-137   2016

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    DOI: 10.1007/s11340-015-0008-2

  71. Interfacial fracture strength of micro-scale Si/Cu components with different free-edge shape Reviewed

    Y. Takahashi, H. Kondo, K. Aihara, M. Takuma, K. Saitoh, S. Arai, S. Muto, Y. Yamamoto, K. Higuchi, N. Tanaka

    Key Engineering Materials   Vol. 665   page: 169-172   2016

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  72. Matrix Factorization for Automatic Chemical Mapping from Electron Microscopic Spectral Imaging Datasets Reviewed

    M. Shiga, S. Muto, K. Tatsumi, K. Tsuda

    Transactions of the Materials Research Society of Japan   Vol. 41   page: 333-336   2016

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  73. Change in Relative Density of Natural Rock Minerals Due to Electron Irradiation Reviewed

    I. Maruyama, S. Muto

    Journal of Advanced Concrete Technology   Vol. 14   page: 706-716   2016

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  74. Evaluation of interfacial fracture strength in micro-components with different free-edge shape Reviewed

    Y. Takahashi, K. Aihara, I. Ashida, K. Higuchi, Y. Yamamoto, S. Arai, S. Muto, N. Tanaka

    Mechanical Engineering Journal   Vol. 3   page: 1-10   2016

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  75. Effects of nitrogen-related defects on visible light photocatalytic response in N+ implanted TiO2: A first-principles study Reviewed

    Junya Senga, Kazuyoshi Tatsumi, Shunsuke Muto, Tomoko Yoshida

    Journal of Applied Physics   Vol. 118   page: 115702-1-6   2015.9

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    DOI: doi: 10.1063/1.4930811

  76. Microscopic mechanism of path-dependence on charge-discharge history in lithium iron phosphate cathode analysis using scanning transmission electron microscopy and electron energy-loss spectroscopy spectral imaging Reviewed

    Yoshitake Honda, Shunsuke Muto, Kazuyoshi Tatsumi, Hiroki Kondo, Kayo Horibuchi, Tetsuro Kobayashi, Tsuyoshi Sasaki

    Journal of Power Sources   Vol. 291   page: 85-94   2015.4

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    DOI: 10.1016/j.jpowsour.2015.04.183

  77. Evalution of Interfacial Fracture Strength in Micro-Scale Components Combined with High-Voltage Environmental Electron Microscopy Reviewed

    Y. Takahashi, S. Arai, Y. Yamamoto, K. Higuchi, H. Kondo, Y. Kitagawa, S. Muto, N. Tanaka

    Experimental Mechanics   Vol. 55   page: 1047-1056   2015

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    DOI: doi:10.1007/s11340-015-0008-2

  78. High-pressure synthesis and Sn valence state analysis of BaTiO3-SnO solid solution Reviewed

    Shoichiro Suzuki, Ken Niwa, Atsushi Honda, Shunsuke Muto, Akira Ando, Masashi Hasegawa

    Journal of Materials Society   Vol. 29   2014.12

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    DOI: DOI: 10.1557/jmr.2014.293

  79. Depth distribution of dopant effective for visible-light response in nitrogen-doped TiO2 photocatalyst Reviewed

    T. Yoshida, E. Kuda, S. Muto

    Surface and Interface Analysis     2014

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    DOI: DOI: 10.1002/sia.5542

  80. Growth of rectangular hollow tube crystals with rutile-type structure in supercritical fluids Reviewed

    K. Niwa, H. Ikegaya, T. Taguchi, S. Muto, T. Tokunaga and M. Hasegawa

    J. Physics: Conf.Ser.   Vol. 500   2014

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    DOI: doi:10.1088/1742-6596/500/2/022007

  81. Signal enhancement of electron magnetic circular dichroism by ultra-high-voltage TEM, toward quantitative nano-magnetism measurements Reviewed

    K. Tatsumi, S. Muto, J. Rusz, T. Kudo, S. Arai

    Microscopy   Vol. 63   page: 243-247   2014

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  82. Discovery of the Last Remaining Binary Platinum-Group Pernitride RuN2 Reviewed

    K. Niwa, K. Suzuki, S. Muto, K. Tatsumi, K. Soda, T. Kikegawa, M. Hasegawa

    Chemistry - A European Journal   Vol. 20   page: 1-5   2014

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    DOI: DOI: 10.1002/chem.201

  83. In Situ Transmission Electron Microscopy of Ionic Conductivity and Reaction Mechanisms in Ultrathin Solid Oxide Fuel Cells Reviewed

    A. H. Tavabi, S. Arai, S. Muto, T. Tanji, R. E. Dunin-Borkowski

    Microscopy and Microanalysis   Vol. 20   page: 1817   2014

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    DOI: 10.1017/S143192761401349X

  84. Development of an environmental high voltage electron microscope and its application to nano and bio-materials Reviewed

    N. Tanaka, J. Usukura, M. Kusunoki, Y. Saito, K. Sasaki, T. Tanji, S. Muto, S. Arai

    Journal of Physics: Conference Series   Vol. 522   page: 12008   2014

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    DOI: DOI:10.1088/1742-6596/522/1/

  85. Energy Loss by Channeled Electrons: A Quantitative Study on Transition Metal Oxides Reviewed

    K.Tatsumi, S.Muto, and J.Rusz

    Microscopy and Microanalysis     page: 1-9   2013.8

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    DOI: 10.1017/S1431927613013214

  86. Development of an environmental high-voltage electron microscope for reaction science Reviewed

    N.Tanaka, J.Usukura, M.Kusunoki, Y.Saito, K.Sasaki, T.Tanji, S. Muto, S.Arai

    Microscopy   Vol. 62   page: 205-215   2013.3

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    DOI: 10.1093/jmicro/dfs095

  87. New algorithm for efficient Bloch-waves calculations of orientation-sensitive ELNES Reviewed

    J. Rusz, S. Muto, K. Tatsumi

    Ultramicroscopy   Vol. 125   page: 81-88   2013.2

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    DOI: 10.1016/j.ultramic.2012.09.009

  88. Parameter-free extraction of EMCD from an energy-filtered diffraction datacube using multivariate curve resolution Reviewed

    S. Muto, K. Tatsumi, J. Rusz

    Ultramicroscopy   Vol. 125   page: 89-96   2013.2

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    DOI: 10.1016/j.ultramic.2012.09.008

  89. White light emission from amorphous silicon-oxycarbide materials Reviewed

    Y. Ishikawa , K. Sato, S. Kawasaki, Y. Ishii, A. Matsumura and S. Muto

    Physica Status Solidi A   Vol. 209 ( 6 ) page: 1022-1025   2012.6

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    DOI: 10.1002/pssa.201100816

  90. Effect of Mg-doping on the degradation of LiNiO2-based cathode materials by combined spectroscopic methods Reviewed

    S. Muto, K. Tatsumi, Y. Kojima, H. Oka, H. Kondo, K. Horibuchi and Y. Ukyo

    Journal of Power Sources   Vol. 205   page: 449-455   2012.5

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    DOI: 10.1016/j.jpowsour.2012.01.071

  91. Chemical Bonding of AlH3 Hydride by Al-L2,3 Electron Energy-Loss Spectra and First-Principles Calculations Reviewed

    K. Tatsumi, S. Muto, K. Ikeda and S. Orimo

    Materials   Vol. 5   page: 566-574   2012.3

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    DOI: 10.3390/ma5040566

  92. 電子顕微鏡分光と第一原理計算によるリチウム電池正極の機能元素電子状態解析 Reviewed

    巽一厳、武藤俊介、近藤広規、佐々木厳、右京良雄

    日本セラミックス協会「セラミックス」   Vol. 47 ( 7 ) page: 528-533   2012

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  93. Spin-filter tunnel junction with matched Fermi surfaces Reviewed

    T. Harada, I. Ohkubo, M. Lippmaa, Y. Sakurai, Y. Matsumoto, S. Muto, H. Koinuma, and M. Oshima

    Phys. Rev. Lett.   Vol. 109   page: 076602-1-5   2012

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  94. Effect of Synthesis Process on Luminescence Properties and Structure of Mesoporous Carbon-Silica Nanocomposite Reviewed

    K. Sato, Y. Ishikawa, Y. Ishii, S. Kawasaki, S. Muto and Y. Yamamoto

    Jpn. J. Appl. Phys.   Vol. 51   page: 082402-1-5   2012

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  95. STEM-EELS多変量解析を用いたLi化学状態マッピング Invited Reviewed

    武藤俊介,巽一厳,近藤広規,堀渕嘉代,右京良雄介

    顕微鏡   Vol. 47   page: 印刷中   2012

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  96. 多変量スペクトル解析によるナノ物性マッピング Invited Reviewed

    武藤俊介

    日本金属学会会報「まてりあ」   Vol. 51 ( 9 ) page: 415-422   2012

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  97. 最先端ナノ電子分光データの統計処理による物性画像診断 Invited Reviewed

    武藤俊介

    SCANS NEWS 2012-Ⅰ   Vol. 35   page: 3-6   2012

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  98. Large Tunnel Magnetoresistance in Epitaxial Oxide Spin-Filter Tunnel Junctions Reviewed

    T.Harada, I. Ohakubo, M.Lippmaa, Y.Sakurai, Y.Matsumoto, S. Muto, H.Koinuma, M.Oshima

    ADVANCED FUNCTIONAL MATERIALS   Vol. 21   page: 4471-4475   2012

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    DOI: 10.1002/adfm.201200985

  99. 反応科学超高圧電子顕微鏡の開発 Reviewed

    田中信夫、臼倉治郎、楠美智子、斎藤弥八、佐々木勝寛、丹治敬義、武藤俊介、荒井重勇

    顕微鏡   Vol. 46   page: 156-159   2011.9

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  100. Site occupancy determination of Eu/Y doped in Ca2SnO4 phosphor by electron channeling microanalysis Reviewed

    S. Muto, Y. Fujimichi, K. Tatsumi, H. Yamane and T. Kawano

    Optical Materials   Vol. 33   page: 1015-1018   2011.5

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  101. 各種信号処理・統計的手法の電子顕微鏡データへの応用-Application of Signal Processing and Statistical Processing to Electron Microscopic Datasets- Reviewed

    武藤俊介

    顕微鏡   Vol. 46   page: 24-29   2011.3

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  102. The growth of carbon coating layers on iron particles and the effect of alloying the iron with silicon Reviewed

    H. Tokoro, S. Fujii, Y. Kobayashi and S. Muto

    Journal of Alloys and Compounds   Vol. 509   page: 1378-1383   2011.1

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  103. Comparative study of annealing and oxidation effects in a SiC:H and a-SiC thin films deposited by radio-frequency magnetron sputtering Reviewed

    A.V. Vasin, S. Muto, Y. Ishikawa, A.V. Rusavsky, V.S. Lysenko and A.N.Nazarov

    Thin Solid Films   Vol. 519   page: 2218-2224   2011.1

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  104. Growth and structure of an ultrathin tin oxide film on Rh(111) Reviewed

    J. Yuhara, D. Tajima, T. Matsui, K. Tatsumi, S. Muto, M. Schmid and P. Varga

    J. Appl. Phys.   Vol. 109 ( 2 ) page: 024903(5pages)   2011.1

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  105. Attribution of white-light emitting centers with carbonized surface in nano-structured SiO2:C layers Reviewed

    A.V.vasin, S.Muto, Y.Ishikawa, J. Salonen, A.N.nazarov, V.S.Lysenko

    Thin Solid Films   Vol. 519   page: 4008-4011   2011.1

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  106. アルミニウム水素化物の合成および原子配置と水素放出特性 Reviewed

    池田一貴,大友季哉,武藤俊介,折茂慎一

    Ceramics Japan   Vol. 46   page: 174-177   2011

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  107. Degradation analysis of a Ni-based layered positive-electrode active material cycled at elevated temperatures studied by scanning transmission electron microscopy and electron energy-loss spectroscopy Reviewed

    Y.Kojima, S.Muto, K.Tatsumi, H.Kondo, H.Oka, K.Horibuchi and Y.Ukyo

    Journal of Power Sources   Vol. 196   page: 7721-7727   2011

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  108. 放射光・電子分光法融合による触媒活性種の化学状態解析 Reviewed

    吉田朋子、武藤俊介

    触媒   Vol. 53 ( 4 ) page: 228-234   2011

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  109. The valence state and partitioning of iron in the Earth's lowermost mantle Reviewed

    R. Sinmyo, K. Hirose, S. Muto, Y. Ohishi and A. Yasuhara

    Jornal of Geophysical Research   Vol. 116   page: B07205-1-9   2011

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    DOI: 10.1029/2010JB008179

  110. Microstructures and Reaction Mechanism of Aluminum Hydride Reviewed

    S. Muto

    Highlights of Collaborated Research   Vol. 46   page: 47   2010.4

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  111. Comparison between Various Calculation Methods for Electronic Structure Investigations:Discussion of Chemical Bonding Based on Electron Energy-loss near Edge Structures Invited Reviewed

    Shunsuke Muto and Kazuyoshi Tatsumi

      Vol. 44 ( 3 ) page: 191-198   2009.10

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  112. Clustering of germanium atoms in silica glass responsible for the 3.1 eV emission band studied by optical absorption and X-ray absorption fine structure analysis Reviewed

    T. Yoshida, S. Muto, L. Yuliati, H. Yoshida and Y. Inada

    J. Nucl. Mater.   Vol. 386-388   page: 1010-1013   2009.9

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  113. Thermoelectric properties of Ba3Co2O6(Co3)0.7 containing one-dimensional CoO6 octahedral columns Reviewed

    K. Iwasaki, T. Yamamoto, H. Yamane, T. Takeda, S. Arai, H. Miyazaki, K. Tatsumi, M. Yoshino, T. Ito, Y. Arita, S. Muto, T. Nagasaki and T. Matsui

    J. Appl. Phys.   Vol. 106 ( 3 ) page: 034905(5pages)   2009.8

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  114. Dehydriding process of a-AlH3 observed by transmission electron microscopy and electron energy-loss spectroscopy Reviewed

    S. Muto, K. Tatsumi, K. Ikeda and S. Orimo

    Journal of Applied Physics   Vol. 105   page: 123514 (4pages)   2009.6

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  115. 複合電子分光による機能元素分析と物性画像診断 Invited Reviewed

    武藤俊介,吉田朋子,巽一厳

    日本金属学会会報「まてりあ」   Vol. 48 ( 6 ) page: 290-293   2009.6

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  116. *Diagnostic nano-analysis of materials properties by multivariate curve resolution applied to spectrum images by S/TEM-EELS Reviewed

    S. Muto, T. Yoshida and K. Tatsumi

    Materials Transactions   Vol. 50   page: 964-969   2009.5

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  117. Local electronic and atomic structures of Ce3+-containing fluoride/oxide by TEM-EELS and first principles calculations Reviewed

    I. Nishida, K. Tatsumi and S. Muto

    Materials Transactions   Vol. 50 ( 5 ) page: 952-958   2009.5

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  118. Capacity fading mechanism of LiNiO2-based lithium ion batteries: I. Analysis by electrochemical and spectroscopic examination Reviewed

    T. Sasaki, T. Nonaka, H. Oka, C. Okuda, Y. Itou, Y. Kondo, Y. Takeuchi, Y. Ukyo, K. Tatsumi and S. Muto

    J. Electrochem. Soc.   Vol. 156   page: A289-A293   2009

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  119. Dehydriding reaction of AlH3: in-situ microscopic observations combined with thermal and surface analyses Reviewed

    K. Ikeda, S. Muto, K. Tatsumi, M. Menjo, S. Kato, M. Bielmann, A. Zuttel, C. M. Jensen and S Orimo

    Nanotechnology   Vol. 20   page: 204004 (4 pages)   2009

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  120. Chemical state analysis of implanted nitrogen in visible-light response TiO2 photo-catalyst Invited Reviewed

    T. Yoshida and S. Muto

    Transaction of Materials Research Society Japan   Vol. 33 ( 2 ) page: 339-344   2008

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  121. Color Control of White Photoluminescence from Carbon Incorporated Silicon Oxide Reviewed

    Y. Ishikawa, A.V. Vasin, J. Salonen, S. Muto, V.S. Lysenko, A.N. Nazarov, N. Shibata, and V.-P. Lehto, J. Appl. Phys. 104 (2008) 083522.

    J. Appl. Phys.   Vol. 104   page: 083522   2008

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  122. Energy drifts correction of electron energy-loss spectra for prolonged data accumulation of low SNR signals Reviewed

    Y. Sasano and S. Muto

    Journal of Electron Microscopy   Vol. 57   page: 149-158   2008

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  123. Site-selective electronic structure of aluminum in oxide ceramics obtained by TEM-EELS analysis using the electron standing-wave method Reviewed

    Y. Yamamoto, K. Tatsumi and S. Muto

    Materials Transaction   Vol. 48   page: 2590-2594   2007.12

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  124. Depth-resolved EELS and chemical state mapping of N+-implanted TiO2 photocatalyst Reviewed

    T. Yoshida, S. Muto and J. Wakabayashi

    Materials Transaction   Vol. 48   page: 2580-2584   2007.12

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  125. Measurement of Surface/Interface Electronic States by Position-Resolved Electron Energy-Loss Spectroscopy and Its Spatial Mapping on Nanometer Scale Invited

      Vol. 45 ( 2 ) page: 27-38   2007.2

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  126. Nano-Order Structural Analysis of White Light-Emitting Silicon Oxide Prepared by Successive Thermal Carbonization/Oxidation of the Porous Silicon Reviewed

    S. Muto, A. V. Vasin, Y. Ishikawa, N. Shibata, J. Salonen, and V-P. Lehto

    Materials Science Forum   Vol. 561-565   page: 1127-1130   2007

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  127. Site-by-site Electronic Structure Analysis of Al-containing Complex Compounds Using Channeling EELS and First Principles Calculations Reviewed

    K. Tatsumi, Y Yamamoto and S. Muto

    Materials Science Forum   Vol. 561-565   page: 2091-2094   2007

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  128. Hydrogen Quasi-Chemically Trapped Between Defective Graphene Layers in Nanostructured Graphite Reviewed

    Y. Miyabe, T. Yoshida, S, Muto and T. Kiyobayashi

    Materials Science Forum   Vol. 561-565   page: 1585-1588   2007

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  129. Depth selective electronic state analysis of implanted nitrogen in visible-light response TiO2 photocatalyst Reviewed

    T. Yoshida, S. Muto and J. Wakabayashi

    Materials Sciencd Forum   Vol. 561-565   page: 567-570   2007

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  130. In situ observation of reversible oxygen absorption/release of ceria-zirconia solid solution with Pt particles by TEM and EELS Reviewed

    S. Arai, S. Muto, T. Sasaki, Y. Ukyo, K. Kuroda, H. Saka

    Electrochem. Solid-State Lett.   Vol. 9   page: E1-E3   2006.4

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  131. Spectral restoration and energy resolution improvement of electron energy-loss spectra by Pixon reconstruction: I.Principle and test examples Reviewed

    S. Muto, R. C. Puetter and K. Tatsumi

    Journal of Electron Microscopy   Vol. 54 ( 4 ) page: 215-223   2006.4

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  132. Fe-Co and Fe-Ni magnetic fine particles encapsulated by graphite carbon Reviewed

    H. Tokoro, S. Fujii, S. Muto and S. Nasu

    J. Appl. Phys.   Vol. 99   page: 08Q512   2006.4

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  133. Intercalated hydrogen in nanostructured graphite studied by electron energy-loss spectroscopy and molecular orbital calculation Reviewed

    T. Kimura, S. Muto, K. Tatsumi, T. Tanabe and T. Kiyobayashi

    Journal of Alloys and Compounds   Vol. 413 ( 1-2 ) page: 150-154   2006.3

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    Hydrogen loosely trapped between graphitic basal planes in hydrogenated nanostructured graphite was detected by the change in the relative intensity ratio of the π * and σ* peaks of the C K-edge in electron energy-loss spectroscopy (EELS). The experimental spectral change was explained by model calculations of intercalated hydrogen in graphitic sheets, using an ab initio molecular orbital (DV-X

  134. Change in mechanical properties of ion-irradiated ceramics by nanoindentation method Reviewed

    S. Nakano, S. Muto and T. Tanabe

    Materials Transactions   Vol. 47 ( 1 ) page: 112-121   2006.1

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    Changes in hardness of several representative ceramics and semiconductors associated with ion irradiation were systematically studied using a combination of nanoindentation and finite element analysis. We established a new method for obtaining the precise hardness of the embedded damaged layer of ion-irradiated samples. The method was applied to silicon carbide,

  135. Site-specific electronic structure analysis by channeling EELS and first principles calculations Reviewed

    K. Tatsumi, S. Muto, Y. Yamamoto, H. Ikeno, S. Yoshioka and I. Tanaka

    Ultramicroscopy   Vol. 106   page: 1019-1023   2006

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  136. Local Oxidation Induced by Inhomogeneous Stress on Blistered Si Surface Reviewed

    S. Igarashi, A. N. Itakura, M. Kitajima, S. Nakano, S. Muto, T. Tanabe, H. Yamamoto and K. Hojou

    Jpn. J. Appl. Phys.   Vol. 45   page: 4179-4182   2006

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  137. Substructures of gas-ion-irradiation induced surface blisters in Si studied with cross-sectional transmission electron microscopy Reviewed

      Vol. 46 ( 10 ) page: 2117-2124   2005.10

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  138. 微小押し込み試験法によるセラミック材料のイオン照射に伴う力学特性変化 Reviewed

    中野伸祐,武藤俊介,田辺哲朗

    日本金属学会誌   Vol. 69 ( 9 ) page: 815-824   2005.9

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  139. 非金属材料におけるヘリウム照射損傷について Invited Reviewed

    武藤俊介

    プラズマ・核融合学会誌   Vol. 81 ( 1 ) page: 41-45   2005.1

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  140. Structure of Oxygen-Related Defect Centers in of Ge1-xSix Alloys Studied by Extended Energy-Loss Fine Structure Analysis Reviewed

    S. Muto, H. Sugiyama, I. Yonenaga and T. Tanabe

    Japanese Journal of Applied Physics   Vol. 44   page: 1892-1896   2005

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  141. Transmission electron microscopy and electron energy loss spectroscopy analysis of hydrogenated nanostructured graphite prepared by mechanical milling Reviewed

    S. Muto, T. Kimuta, T. Kiyobayashi, T. Tanabe and T. Maruyama

    Japanese Journal of Applied Physics   Vol. 44   page: 2061-2068   2005

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    Hydrogen trapping sites in hydrogenated nanostructured graphite (HNG) prepared by mechanical milling under hydrogen atmosphere were intensively studied with transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS). Measurements of

  142. 複合電子顕微分光への展望とその応用の可能性 Invited Reviewed

    武藤俊介、巽一厳

    日本セラミックス協会「セラミックス」   Vol. 11   page: 928-931   2005

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  143. TEM-EXELFS法の特徴とその応用の現状と展望 Invited Reviewed

    武藤俊介

    日本結晶学会誌   Vol. 471   page: 61-66   2005

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  144. Formation and in-situ dynamics of metallic nanoblisters in Ga+ implanted GaN nanowires Reviewed

    A. Datta, S. Dhara, S. Muto, C. W. Hsu, C. T. Wu, C. H. Shen, T. Tanabe, T. Maruyama, K. H. Chen, L. C. Chen and Y. L. Wang

    Nanotechnology   Vol. 16   page: 2764-2769   2005

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  145. Atomistic structure and strain relaxation in Czochralski-grown SixGe1-x bulk alloys Reviewed

      Vol. 16   page: 429-432   2005

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  146. Mechanism of nanoblister formation in Ga+ self-ion implanted GaN nanowires Reviewed

    S. Dahra, A. Datta, S. Muto, C.T. Wu, K.H. Chen, Y. L. Wang, T. Tanabe, C.H. Shen, C.W.Hsu, L.C. Chen and T. Maruyama

    Appllied Physics Letters   Vol. 86   page: 203119-1-3   2005

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  147. Irradiation-induced hardening/softening in SiO2 studied with instrumented indentation Reviewed

    S. Nakano, S. Muto and T. Tanabe

    Materials Science and Engineering A   Vol. 400-401   page: 382-385   2005

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  148. Maximum entropy spectral analysis of extended energy-loss fine structure and its application to time-resolved measurement Reviewed

    S. Muto

    Philosophical Magazine   Vol. 84   page: 2793-2808   2004.9

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  149. EXELFS analysis of oxygen in Si-Ge alloys Reviewed

    S. Muto, H. Sugiyama, I. Yonenaga and T. Tanabe

    Proc. 8th Asia-Pacific Electron Microscopy Conference (APEM-8)     page: 483-484   2004.6

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  150. Evidence of spatial valence fluctuation in Ce2Zr2O7.5 detected with electron channeling EELS: Janus state of Cerium Reviewed

    S. Arai, S. Muto, T. Sasaki, Y. Ukyo, K. Kuroda and H. Saka

    Proc. 8th Asia-Pacific Electron Microscopy Conference (APEM-8)     page: 142-143   2004.6

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  151. FT-IR study on the effect of OH content on the damaging process in silica irradiated by hydrogen Reviewed

    T. Yoshida, T. Tanabe, M. Hirano and S. Muto

    Nuclear Instruments and Methods in Physics Research B   Vol. 218   page: 202-208   2004.6

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  152. Characterization of nanodome on GaN nanowires formed with Ga Ion irradiation Reviewed

    S. Muto, S. Dhara, A. Datta, C.-W. Hsu, C.-T. Wu, C.-H. Shen, L.-C. Chen, K.-H. Chen, Y.-L. Wang, T. Tanabe, T. Maruyama, H.-M. Lin and C.-C. Chen

    Materials Transactions   Vol. 45 ( 2 ) page: 435-439   2004.4

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  153. シリコン表面の水素イオン照射誘起ブリスターの非破壊構造解析と内部ガス圧評価 Reviewed

    中野伸祐、榎本成晟、武藤俊介、田辺哲朗

    日本金属学会会報「まてりあ」   Vol. 43 ( 12 ) page: 1008   2004.4

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  154. Synthesis of boron nitride nanolayers encapsulating iron fine particles and boron nitride nanotubes Reviewed

    H. Tokoro, S. Fujii, T. Oku and S. Muto

    Materials Research Society Symposium Proceedings   Vol. 789   page: N3.34-39   2004

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  155. Valence Change of Cerium Ion associated with Redox reactions of Ceria-Zirconia Solid Solution by Electron Energy-Loss Spectroscopy Reviewed

    S. Arai, S. Muto, J. Murai, T. Sasaki, Y. Ukyo, K. Kuroda and H. Saka

    Mater.Trans.   Vol. 45   page: 2951-2955   2004

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  156. TEM analysis of blisters on Si surface formed by hydrogen ion irradiation Reviewed

    S. Muto, T. Tanabe and S. Igarashi

    Physica Scripta   Vol. T108   page: 19-22   2004

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  157. ブリスタリングによる応力変調を利用した局所シリコン酸化の観察 Reviewed

    五十嵐慎一、板倉明子、北島正弘、中野伸祐、武藤俊介、田辺哲朗、山本博之、北條喜一

    表面科学   Vol. 25   page: 562-567   2004

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  158. Crystal Structure of Ce2Zr2O7 and β-Ce2Zr2O7.5 Reviewed

    T. Sasaki, Y. Ukyo, K. Kuroda, S. Arai, S. Muto and H. Saka

    Journal of ceramics society of Japan   Vol. 112 ( 8 ) page: 440-444   2004

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  159. 電子エネルギー損失分光法によるセリア-ジルコニア固溶体の規則相の解析 Reviewed

    荒井重勇、武藤俊介、村井盾哉、佐々木厳、右京良雄、黒田光太郎、坂公恭

    日本金属学会誌   Vol. 68 ( 5 ) page: 264-268   2004

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  160. EXELFS/ELNES study of electron irradiation induced oxidation of α-SiC Reviewed

    S. Muto, H. Sugiyama, T. Kimura, T. Tanabe and T. Maruyama

      Vol. 218C   page: 117-122   2004

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  161. Structure of an Oxygen-Related Defect Complex in SiC Studied with Electron Energy-Loss Spectroscopy Reviewed

    S. Muto, H. Sugiyama, T. Kimura and T. Tanabe

    Japanese Journal of Applied Physics   Vol. 43   page: 1076-1080   2004

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  162. Reverse Monte Carlo analysis of extended energy-loss fine structure for disordered structures of tetrahedrally co-ordinated materials: its applicability Reviewed

    S. Muto and T. Tanabe

    Journal of Electron Microscopy   Vol. 52   page: 125-132   2003

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  163. Cross sectional TEM observation of gas-ion-irradiation induced surface blisters and their precursors in SiC Reviewed

    S. Muto, T. Tanabe and T. Maruyama

    Materials Transactions   Vol. 44 ( 12 ) page: 2599-2604   2003

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  164. Experimental and full multiple scattering approaches to energy-loss near-edge structures for c-Si, a-Si and a-Si:H Reviewed

    K. Hayakawa, T. Fujikawa and S. Muto

    Chemical Physics Letters   Vol. 371   page: 498-503   2003

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  165. Local structures and damage processes of electron irradiated α-SiC studied with transmission electron microscopy and electron energy-loss spectroscopy Reviewed

    S. Muto and T. Tanabe

    Journal of Applied Physics   Vol. 93   page: 3765-3775   2003

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  166. Damaging process of α-SiC under electron irradiation studied with electron microscopy and spectroscopy Reviewed

    S. Muto, T. Tanabe, T. Shibayama, and H. Takahashi

    Nuclear Instruments and Methods for Physics Research B   Vol. 191   page: 519-523   2002

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  167. Development of new TEM specimen holder for cathodoluminescence detection Reviewed

    T. Tanabe, S. Muto and S. Tohtake

    Journal of Electron Microscopy   Vol. 51   page: 311-313   2002

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  168. Surface Blistering of Ion Irradiated SiC studied by Grazing Incidence Electron Microscopy Reviewed

    S. Igarashi, S. Muto T. Tanabe and T. Maruyama

    Journal of Nuclear Materials   Vol. 307-311   page: 1126-1129   2002

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  169. TEM and EELS characterization of carbon dust and co-deposited layers from the TEXTOR tokamak Reviewed

    Journal of Nuclear Materials   Vol. 307-311   page: 1289-1293   2002

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  170. In-situ Observation of Surface Blistering in Silicon by Deuterium and Helium Ion Irradiation Reviewed

    S. Igarashi, S. Muto, T. Tanabe, J. Aihara and K. Hojou

    Surface and Coatings Technology   Vol. 158-159C   page: 421-425   2002

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  171. Chemical effects of hydrogen on surface damaging process in gas-ion irradiated alumina Reviewed

    J. Asami, S. Muto and T. Tanabe

    Surface and Coatings Technology   Vol. 158-159C   page: 518-521   2002

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  172. RHEED study of irradiation-induced surface damage processes in Si and α-Al2O3 Reviewed

    S. Muto, J. Asami and T. Tanabe

    Nuclear Instruments and Methods for Physics Research B   Vol. 196   page: 324-332   2002

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  173. 透過電子エネルギー損失分光における内殻励起スペクトルを利用した軽元素材料の局所領域構造解析 Reviewed

    武藤俊介、田辺哲朗

    表面科学   Vol. 23   page: 381-388   2002

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  174. Formation of Si clusters in electron-irradiated SiC studied by electron energy-loss spectroscopy Reviewed

    N. Asaoka, S. Muto and T. Tanabe

    Diamond and Related Materials   Vol. 10   page: 1247-1250   2001.4

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  175. 低角度入射電子顕微鏡法による表面微小構造体の非破壊分析 Reviewed

    五十嵐慎一、武藤俊介、田辺哲朗

    日本金属学会誌「分析電子顕微鏡法による材料評価」   Vol. 65 ( 5 ) page: 423-426   2001

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  176. Non-Destructive Structural Analysis of Surface Blistering by TEM and EELS in a Reflection Configuration Reviewed

    S. Muto, T. Matsui and T. Tanabe

    Journal of Nuclear Materials   Vol. 290-293   page: 131-134   2001

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  177. Energy-Filtered Image of Surface Blisters by Grazing Incidence Electron Microscopy Reviewed

    S. Igarashi, S. Muto, T. Tanabe and T. Maruyama

    Materials Transactions   Vol. 42 ( 10 ) page: 2131-2132   2001

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  178. TEM-EXELFS法の効用:EXAFSとの対比 Invited

    武藤俊介

    電子顕微鏡   Vol. 36 ( 1 ) page: 65-67   2001

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  179. エネルギー損失広域微細構造による短距離構造相関の解析―二体分布から多体分布導出へ―

    武藤俊介、田辺哲朗

    日本金属学会誌「分析電子顕微鏡法による材料評価」   Vol. 65 ( 5 ) page: 332-337   2001

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  180. Detailed Structure Analysis of Deposit Layer in TEXTOR by Means of TEM Techniques Reviewed

    S. Muto, N. Yokoya and T. Tanabe

    Journal of Nuclear Materials   Vol. 290-293   page: 295-298   2001

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  181. Observation of Surface Blistering by Grazing Incidence Electron Microscopy

    S. Muto, T. Matsui and T. Tanabe

    Japanese Journal of Applied Physics   Vol. 39 ( 6A ) page: 3555-3556   2000.4

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  182. Application of spline wavelet transformation to the analysis of extended energy-loss fine structure Reviewed

    S. Muto

    Journal of Electron Microscopy   Vol. 49   page: 525-529   2000.4

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    We propose a new analysis method of the extended energy-loss fine structure (EXELFS), applying the multi-resolution analysis (MRA) in the wavelet transformation. We select the cardinal spline wavelet where the rank-4 cardinal spline function is used as a scaling function to construct the mother wavelet. In contrast with the conventional analysis method, the present method is efficient in filtering out the high-frequency noise and low-frequency components introduced by the numerical analysis process without distorting the original signal components, which promises quantitative analyses with less uncertainties.

  183. Temperature effect of electron-irradiation-induced structural modification in graphite Reviewed

    S. Muto and T. Tanabe

    Journal of Nuclear Materials   Vol. 283-287   page: 917-921   2000

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  184. Extraction of three-body distribution in amorphous silicon by wavelet analysis of EXELFS

    S. Muto, K. M. Yu, W. Walukiewicz, H-C. Jin and J. R. Abelson

    Proceedings of 12th European Congress on Electron Microscopy, EUREM-2000   Vol. 1   page: 319-320   2000

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  185. TEM study on deuterium irradiation-induced defects in tungsten and molybdenum Reviewed

    T. Matsui, S. Muto and T. Tanabe

    Journal of Nuclear Materials   Vol. 283-287   page: 1139-1143   2000

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  186. Wavelet analysis of extended energy-loss fine structure

    S. Muto

    Proceedings 12th European Congress on Electron Microscopy, EUREM-2000   Vol. 1   page: 321-322   2000

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  187. Structural Change in Graphite under Electron Irradiation at Low Temperatures

    Journal of Nuclear Materials   Vol. 271&272   page: 280-284   1999.4

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  188. Local structures of Ga atoms in amorphous silicon and hydrogenated amorphous silicon before and after synchrotron X-ray irradiation

    K. M. Yu, W. Walukiewicz, S. Muto, H.-G. Jin, J. R. Abelson, C. Clerc, C. J. Glover and M. C. Ridgway

    Applied Physics Letters   Vol. 75 ( 21 ) page: 3282-3284   1999.4

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  189. Fragmentation of graphite crystals by electron irradiation at elevated temperatures

    S. Muto and T. Tanabe

    Journal of Electron Microscopy   Vol. 48 ( 5 ) page: 519-523   1999.4

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  190. Local structural order in electron-irradiated graphite studied by high-resolution high-voltage electron microscopy

    S. Muto, S. Horibuchi and T. Tanabe

    Journal of Electron Microscopy   Vol. 48 ( 6 ) page: 767-776   1999.4

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  191. Change in Chemical Bonding States in Electron-Irrodiated Graphite(共著)

    Japanese Journal of Applied Physics Part(]G0001[)   Vol. 38 ( 3A ) page: 1514-1515   1999

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  192. On EXELFS data analysis for obtaining reliable structural parameters

    Y. Kobayashi, S. Muto, C. J. Echer and T. Tanabe

    Journal of Electron Microscopy   Vol. 48 ( 5 ) page: 525-529   1999

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  193. The effects of X-ray induced structural changes on the microstructure of a-Si after thermal crystallization

    K. M. Yu, W. Walukiewicz, S. Muto, H-C. Jin and J. R. Abelson

    Applied Physics Letters   Vol. 75 ( 14 ) page: 2032-2034   1999

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  194. TEM Analysis of Surface Ridge Network in an Ion-Irradiated Graphite Thin Film

    S. Muto, T. Tanabe, M. Takeuchi, Y. Kobayashi, S. Furuno and K. Hojou

    Journal of Nuclear Materials   Vol. 271&272   page: 285-289   1999

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  195. Molecular Dynamics Study on Local Atomic Displacements Associated with Point Defects and Displacive Phase Transformations(共著)

    Materials Transactions, JIM   Vol. 40 ( 6 ) page: 514-521   1999

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  196. The Influence of X-ray Irradiation on Structural Relaxation and Crystallization of Amorphous Silicon films

    S. Muto, Y. Kobayashi, K.-M. Yu, W. Walukiewicz, C.J. Echer, S. McCormick and J.R. Abelson

    Japanese Journal of Applied Physics   Vol. 37 ( 11 ) page: 5890-5893   1998.4

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  197. HREM-EELS Study of Structural Changes in Electron Irradiated Graphite (共著)

    Proceedings of 14th International Congress on Electron Microscopy     page: 119   1998

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  198. Lacal Atom Displacements Around Crystal Lattice Defects Inducing Phase Transformation Studies by Molecular Dynamics Simulation (共著)

    Proceedings of Pacific Rim International Conference on Advanced Materials and Processing     page: 1461   1998

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  199. Spatial and Structural Modification in Graphite by High-Energy Electron Irradiation (共著)

    Proceedings of 5-th NIRIM International Symposium on Advanced Materials     page: 129   1998

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  200. TEM-EELS法による黒鉛の電子照射誘起構造変化 Invited Reviewed

    まてりあ   Vol. 37 ( 10 ) page: 873-879   1998

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  201. A New Microscopic Model of Electron Irradiation Damage in Graphite

    S. Muto, M. Takeuchi and T. Tanabe

    Journal of Surface Analysis   Vol. 3 ( 2 ) page: 420-425   1997.4

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  202. Damage Process in Electron-Irradiated Graphite Studied by Transmission Electron Microscopy. II. Analysis of Extended Energy-Loss Fine Structure of Highyly Oriented Pyrolytic Graphite

    M. Takeuchi, S. Muto, T. Tanabe, S. Arai and T. Kuroyanagi

    Philosophical Magazine A   Vol. 76 ( 3 ) page: 691-700   1997.4

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  203. Damage Process in Electron-Irradiated Graphite by Transmission Electron Microscopy. I. High Resolution Observation of Highly Graphitized Carbon Fibre

    S. Muto and T. Tanabe

    Philosophical Magazine A   Vol. 76 ( 3 ) page: 679-690   1997.4

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  204. 計算材料設計システムMASPHYCによる分子動力学シミュレーション(共著)

    名古屋大学大型計算機センターニュース   Vol. 27 ( 4 ) page: 305   1996

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  205. New Stable Structure on the (001) Plane in Germanium Formed by Deutron Irradiation(共著)

    Philosophical Magazine Letters   Vol. 72 ( 2 ) page: 99   1995

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  206. Extended Defect Formation in Silicon and Germanium Induced by Light Gas Ion Irradiation Studied with Transmission Electron Microscopy(共著)

    Materials Science Forum   Vol. 196-201   page: 1171   1995

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  207. Structure of Hydrogen Induced Platelet Studied by Transmission Electron Microscopy

    Philosophical Magazine A   Vol. 72 ( 4 ) page: 1057   1995

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  208. A New Type of Extended Defect on the (100) Plane in Germanium Produced by Deuteron Bombardment (共著)

    Proceedings of International Congress on Electron Microscopy   Vol. II   page: 565   1994

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  209. Structural Study of Hydrogen Induced Platelet in Si and Ge by Transmission Electron Microscopy (共著)

    Materials Science Forum   Vol. 143-147   page: 897   1994

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  210. Study on Lattice Displacements Associated With ω-Transformations with Transmission Electron Microscopy

    Electron Microscopy   Vol. 29 ( 1 ) page: 2   1994

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  211. In-situ HREM Observation of Electron-Irradiation-Induced Martensitic Transformation in a N63Al37 Alloy (共著)

    Journal of Alloys and Compounds   Vol. 199   page: 1   1993

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  212. Displacive and Diffusive Components in the Formation of the Ni2Al Structure Studied by HREM, SAED and Micro-ED

    Proceedings of International Conference on Martensitic Trausformations, ICOMAT-92     page: 101   1993

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  213. High Resolution Electron Microscopy of Structural Defects in Crystalline C60 and C70 (共著)

    Philosophical Magazine B   Vol. 67 ( 4 ) page: 443   1993

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  214. High-Resolution Electron Microscopy and Electron Diffraction Study of the Displacive Transformation of the Ni2Al Phase in Ni65Al35 Alloy and Associated Martensitic Transformation (共著)

    Acta Metallurgica et Materialia   Vol. 41 ( 8 ) page: 2377   1993

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  215. Displacive-Replacive Phase Transformation in a N62.5Al37.52 Phase by Transmission Electron Microscopy and Diffraction (共著)

    Philosophical Magazine B   Vol. 67 ( 5 ) page: 673   1993

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  216. Structures and Phase Transitions in C60 and C70 Fullerites (共著)

    Ultramicroscopy   Vol. 51   page: 168   1993

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  217. Structure of Si Aggregates in Heavily Si-Doped GaAs (共著)

    Philosophical Magazine A   Vol. 66 ( 2 ) page: 257   1992

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Books 9

  1. Nanoinformatics

    M. Shiga, S. Muto( Role: Joint author)

    Springer  2018.1 

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    Language:Japanese

  2. ライフサイエンス顕微鏡学ハンドブック

    著者多数( Role: Contributor)

    朝倉書店  2017.1 

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    Language:Japanese

  3. 金属学会セミナーテキスト「機能元素のナノ材料科学」

    著者多数( Role: Contributor)

    日本金属学会  2009.7 

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    Language:Japanese

  4. 21世紀の格子欠陥研究に残された課題

    西谷滋人、青木正人、武藤俊介(共編)( Role: Joint author)

    吉岡書店  2003.7 

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    Language:Japanese

  5. Science, Technology and Education of Microscopy: an Overview

    ( Role: Joint author)

    FORMATEX  2003 

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    Language:English

  6. 電子顕微鏡法の実践と応用写真集

    著者多数( Role: Joint author)

    日本鉄鋼協会・日本金属学会共同出版委員会  2002.3 

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    Language:Japanese

  7. 分子動力学

    武藤俊介、竹内宗孝(分担執筆)( Role: Joint author)

    金属学会セミナー「パソコンで学ぶ材料力学」  2001.11 

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    Language:Japanese

  8. EXELFSによる無秩序構造の解析(単著)

    電子顕微鏡基礎技術と応用1998「極微構造解明の新展開」  1998 

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    Language:Japanese

  9. Effects of Synchrotron X-rays on PVD-Deposited And Ion-Implanted a-Si (共著)

    Materials Research Society Symposium Proceedings  1997 

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    Language:English

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MISC 17

  1. Control of surface potential and hydroxyapatite formation on TiO2 scales containing nitrogen-related defects

    Masami Hashimoto, Takafumi Ogawa, Satoshi Kitaoka, Shunsuke Muto, Maiko Furuya, Hiroyasu Kanetaka, Masayuki Abe, Hayato Yamashita

    Acta Materialia   Vol. 155   page: 379 - 385   2018.8

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:Acta Materialia Inc  

    The hydroxyapatite (HAp) formation ability and related surface potentials of rutile-type TiO2 scales formed on Ti are controlled by varying the Ti heat treatment conditions in a N2 atmosphere containing a trace amount of O2. The zeta potentials of the samples heated at 873 and 973 K for 1 h are large negative and positive values, respectively, where HAp formation on the surface is enhanced in both cases. Upon longer heat treatment at those temperatures, the HAp forming ability diminishes and the zeta potential becomes more neutral. Kelvin probe force microscopy indicates that, under dry conditions, the surface charges on the TiO2 scales formed at 873 and 973 K in 1 h are positive and negative, respectively, opposite to the signs of the zeta potentials measured under wet conditions. Scanning transmission electron microscopy, electron energy loss spectroscopy, and calculations of defect formation energies reveal that nitrogen atoms incorporated into TiO2 during scale formation produce the charged defects (NO)O −1 and (N2)O +2 for the scales formed in 1 h at 873 and 973 K, respectively. In the case of longer treatments, nitrogen-related defects presumably transform into more stable states, such as N2 gas, in voids, resulting in a neutral surface. The present findings lead to physical models of surface charge distributions that elucidate the relationship between nitrogen-related defects, charged surfaces, and HAp formation mechanisms.

    DOI: 10.1016/j.actamat.2018.05.072

    Scopus

  2. EPR Study of Porous Si:C and SiO2:C Layers

    Dariya Savchenko, Andrii Vasin, Shunsuke Muto, Ekaterina Kalabukhova, Alexei Nazarov

    Physica Status Solidi (B) Basic Research   Vol. 255 ( 6 )   2018.6

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:Wiley-VCH Verlag  

    Initial porous silicon (por-Si), carbonized porous silicon (por-Si:C), and carbon-incorporated porous silicon oxide (por-SiO2:C) layers are studied by electron paramagnetic resonance (EPR) at T = 10–13 K. Scanning transmission electron microscopy and electron energy loss (EEL) spectroscopy show that por-Si:C and por-SiO2:C layers have a highly disordered structure with mixing sp2 and sp3 CC bonds. In the por-SiO2:C layers, the peak of the oxygen bonded to carbon in the form of hydroxyl groups is found in the EEL spectrum of the C K-edge region. Low-intensity signals of Lorentzian lineshape are detected in the EPR spectrum of por-Si, por-Si:C, por-SiO2:C layers. One of them is attributed to the Pb0 defect at the Si/SiO2 interface of nanocrystalline grain and the second to the silicon dangling bonds (SiDB) localized in nanocrystalline Si. The carbonization of por-Si layers and subsequent oxidation of por-Si:C gives rise to the appearance of additional EPR signals of high intensity at g = 2.0035(3) in por-Si:C and at g = 2.0030(3) in por-SiO2:C, which are assigned to carbon-related defects (CRD) and carbon clusters, correspondingly. It was found that predominant defect types in por-Si:C and por-SiO2:C layers are CRD and carbon clusters, respectively, while the spin concentration of Pb0 interface defects and SiDB is low.

    DOI: 10.1002/pssb.201700559

    Scopus

  3. Interfacial fracture strength evaluation of Cu/SiN micro-components: applicability of the linear fracture mechanics criterion under a hydrogen environment

    Yoshimasa Takahashi, Itaru Ashida, Shigeo Arai, Kimitaka Higuchi, Yuta Yamamoto, Shunsuke Muto

    International Journal of Fracture   Vol. 210 ( 1-2 ) page: 223 - 231   2018.3

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:Springer Netherlands  

    The strength against fracture initiation from an interface free-edge of bonded copper (Cu) and silicon nitride (SiN) micro-components is studied. Quantitative fracture tests are conducted either in a vacuum environment or in a gaseous hydrogen (H2) environment. By using two kinds of specimens, Types I and II, having the same free-edge geometry (135∘/135∘) but different outer shape, the validity of the linear fracture mechanics criterion is critically evaluated. For specimens tested in vacuum, fracture initiation strength represented by the elastic stress intensity factor of the near-edge normal stress component is found to be the same irrespective of the specimen type, indicating that the fracture mechanics criterion holds. For specimens tested in H2 gas, the strength of both types is reduced and, interestingly, Type II strength shows greater reduction than Type I. In other words, the fracture mechanics criterion does not hold in H2 gas. Such a difference may be attributable to the difference of local plasticity in each specimen type.

    DOI: 10.1007/s10704-018-0269-8

    Scopus

  4. Unmixing hyperspectral data by using signal subspace sampling

    Jakob Spiegelberg, Shunsuke Muto, Masahiro Ohtsuka, Kristiaan Pelckmans, Jan Rusz

    ULTRAMICROSCOPY   Vol. 182   page: 205 - 211   2017.11

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    This paper demonstrates how Signal Subspace Sampling (SSS) is an effective pre-processing step for Non-negative Matrix Factorization (NMF) or Vertex Component Analysis (VCA). The approach allows to uniquely extract non-negative source signals which are orthogonal in at least one observation channel, respectively. It is thus well suited for processing hyperspectral images from X-ray microscopy, or other emission spectroscopies, into its non-negative source components. The key idea is to resample the given data so as to satisfy better the necessity and sufficiency conditions for the subsequent NMF or VCA. Results obtained both on an artificial simulation study as well as based on experimental data from electronmicroscopy are reported. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.ultramic.2017.07.009

    Web of Science

  5. A microscopy method for scanning transmission electron microscopy imaging of the antibacterial activity of polymeric nanoparticles on a biofilm with an ionic liquid

    Chisato Takahashi, Shunsuke Muto, Hiromitsu Yamamoto

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS   Vol. 105 ( 6 ) page: 1432 - 1437   2017.8

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:WILEY  

    In this study, we developed a scanning transmission electron microscopy (STEM) method for imaging the antibacterial activity of organic polymeric nanoparticles (NPs) toward biofilms formed by Staphylococcus epidermidis bacterial cells, for optimizing NPs to treat biofilm infections. The combination of sample preparation method using a hydrophilic ionic liquid (IL) and STEM observation using the cooling holder eliminates the need for specialized equipment and techniques for biological sample preparation. The annular dark-field STEM results indicated that the two types of biodegradable poly-(DL-lactide-co-glycolide) (PLGA) NPs: PLGA modified with chitosan (CS), and clarithromycin (CAM)loaded+CS-modified PLGA, prepared by emulsion solvent diffusion exhibited different antibacterial activities in nanoscale. To confirm damage to the sample during STEM obser-vation, we observed the PLGA NPs and the biofilm treated with PLGA NPs by both the conventional method and the newly developed method. The optimized method allows microstructure of the biofilm treated with PLGA NPs to be maintained for 25 min at a current flow of 40 pA. The developed simple sample preparation method would be helpful to understand the interaction of drugs with target materials. In addition, this technique could contribute to the visualization of other deformable composite materials at the nanoscale level. (C) 2016 Wiley Periodicals, Inc.

    DOI: 10.1002/jbm.b.33680

    Web of Science

  6. High-precision quantitative atomic-site-analysis of functional dopants in crystalline materials by electron-channelling-enhanced microanalysis

    Shunsuke Muto, Masahiro Ohtsuka

    PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION OF MATERIALS   Vol. 63 ( 2 ) page: 40 - 61   2017.6

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    Language:English   Publishing type:Book review, literature introduction, etc.   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Knowledge of the location and concentration of impurity atoms doped into a synthesized material is of great interest to investigate the effect of doping. This would usually be investigated using X-ray or neutron diffraction methods in combination with Rietveld analysis. However, this technique requires a large-scale facility such as a synchrotron radiation source and nuclear reactor, and can sometimes fail to produce the desired results, depending on the constituent elements and the crystallographic conditions that are being analysed. Thus, it would be preferable to use an element-selective spectroscopy technique that is applicable to any combination of elements. We have established a quantitative method to deduce the occupation sites and their occupancies, as well as the site-dependent chemical states of the doped elements, using a combination of transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, and electron energy-loss spectroscopy (EELS). The method is based on electron channelling phenomena where the symmetries of the Bloch waves excited in a crystal are dependent on the diffraction condition or incident beam direction with respect to the crystal axes. By rocking the incident electron beam with a fixed pivot point on the sample surface, a set of EDX/EELS spectra are obtained as a function of the beam direction. This is followed by a statistical treatment to extract the atom-site-dependent spectra, thereby quantitatively enabling the estimation of the site occupancies and chemical states of the dopants. This is an extension of the 'ALCHEMI' (Atom Location by Channelling Enhanced Microanalysis) method or 'HARECXS/HARECES' (High Angular Resolution Channelled X-ray/Electron Spectroscopy), and we further extended the method to be applicable to cases where the crystal of interest contains multiple inequivalent atomic sites for a particular element, applying the precise spectral predictions based on electron elastic/inelastic dynamical scattering theory. After introduction of conceptual aspects of the method, we describe the extension of the method together with the development of the theoretical calculation method. We then demonstrate several useful applications of the method, including luminescent, ferrite, and battery materials. We discuss the advantages and drawbacks of the present method, compared with those of the recently developed atomic column-by-column analysis using aberration-corrected scanning TEM and high-efficiency X-ray detectors. (C) 2017 Elsevier Ltd. All rights reserved

    DOI: 10.1016/j.pcrysgrow.2017.02.001

    Web of Science

  7. Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution

    Jan Rusz, Jakob Spiegelberg, Shunsuke Muto, Thomas Thersleff, Masahiro Ohtsuka, Klaus Leifer, Peter M. Oppeneer

    PHYSICAL REVIEW B   Vol. 95 ( 17 )   2017.5

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:AMER PHYSICAL SOC  

    Inelastic electron scattering is a consequence of mostly Coulomb interaction between electrons in the sample and electron beam and, as such, it is a nonlocal event. In atomic resolution experiments, it thus opens the following question: How far is the origin of the inelastic scattering signal that is observed when the electron beam is passing nearby an atomic column or plane? We analyze computationally the delocalization of the magnetic signal in electron magnetic circular dichroism (EMCD) experiments in the so-called three-beam orientation, allowing one to image individual atomic planes. We compare the classical EMCD setup using the double-difference procedure (DD-EMCD) to a recently introduced atomic plane resolution EMCD (APR-EMCD) geometry, assuming the same probe size. We observe a strong localization of the EMCD signal to the closest atomic plane, confirming the potential of EMCD to study an evolution of magnetic properties near surfaces or interfaces with atomic plane resolution. The localization of the EMCD signal is remarkably higher than the localization of the nonmagnetic component of the inelastic scattering cross section. We also analyze double-channeling effects and find them particularly strong for the DD-EMCD method, while for APR-EMCD they appear to be minor. The DD-EMCD signal, on the other hand, appears to be more robust with respect to sample thickness than that of the APR-EMCD.

    DOI: 10.1103/PhysRevB.95.174412

    Web of Science

  8. Microscopic origin of ultra-low friction coefficient between the wear track formed on carbon nitride coating and transfer layer on sliding ball in friction tests under dry N-2

    Hiroshi Inoue, Shunsuke Muto, Shigeo Arai, Hiroaki Wasada, Noritsugu Umehara

    SURFACE & COATINGS TECHNOLOGY   Vol. 313   page: 31 - 39   2017.3

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:ELSEVIER SCIENCE SA  

    Carbon nitride (CN) coatings have been found to exhibit an ultra-low friction coefficient (less than 0.01) after repeated sliding against a silicon nitride (Si3N4) ball in a dry nitrogen gas (N-2) atmosphere. However, the mechanism for this has not yet been fully elucidated with respect to analyzing changes in the space structure of CNN. In the present study, we examined the microscopic structural changes in the near-surface structural transition layers of the wear track in the CN, coating and the transfer layer of the Si3N4 ball, using scanning transmission electron microscopy and electron energy-loss spectroscopy. We investigated the nitrogen concentration, density, and curvature of fragmented graphitic planes in the structural transition layers of both the CN,, coating and the transfer layer of the Si3N4 ball by analyzing the plasmon peak and carbon K-edge. In addition, we theoretically examined the chemical bonding states of nitrogen doping in various model clusters using an ab initio molecular orbital method to clarify the role of nitrogen in the ultra -low friction behavior. The mechanism behind the ultra low friction behavior is explained by nano-graphitization of the fragmented carbon structure with optimal nitrogen concentration passivating the contacting counter surfaces of the coating and ball formed during sliding. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.surfcoat.2017.01.048

    Web of Science

  9. Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface

    Thomas Thersleff, Shunsuke Muto, Miroslaw Werwinski, Jakob Spiegelberg, Yaroslav Kvashnin, Bjorgvin Hjorvarsson, Olle Eriksson, Jan Rusz, Klaus Leifer

    SCIENTIFIC REPORTS   Vol. 7   2017.3

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:NATURE PUBLISHING GROUP  

    While the performance of magnetic tunnel junctions based on metal/oxide interfaces is determined by hybridization, charge transfer, and magnetic properties at the interface, there are currently only limited experimental techniques with sufficient spatial resolution to directly observe these effects simultaneously in real-space. In this letter, we demonstrate an experimental method based on Electron Magnetic Circular Dichroism (EMCD) that will allow researchers to simultaneously map magnetic transitions and valency in real-space over interfacial cross-sections with sub-nanometer spatial resolution. We apply this method to an Fe/MgO bilayer system, observing a significant enhancement in the orbital to spin moment ratio that is strongly localized to the interfacial region. Through the use of first-principles calculations, multivariate statistical analysis, and Electron Energy-Loss Spectroscopy (EELS), we explore the extent to which this enhancement can be attributed to emergent magnetism due to structural confinement at the interface. We conclude that this method has the potential to directly visualize spin and orbital moments at buried interfaces in magnetic systems with unprecedented spatial resolution.

    DOI: 10.1038/srep44802

    Web of Science

  10. Detection of local chemical states of lithium and their spatial mapping by scanning transmission electron microscopy, electron energy-loss spectroscopy and hyperspectral image analysis Reviewed

    Shunsuke Muto, Kazuyoshi Tatsumi

    MICROSCOPY   Vol. 66 ( 1 ) page: 39 - 49   2017.2

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    Language:English   Publishing type:Book review, literature introduction, etc.   Publisher:OXFORD UNIV PRESS  

    Advancements in the field of renewable energy resources have led to a growing demand for the analysis of light elements at the nanometer scale. Detection of lithium is one of the key issues to be resolved for providing guiding principles for the synthesis of cathode active materials, and degradation analysis after repeated use of those materials. We have reviewed the different techniques currently used for the characterization of light elements such as high-resolution transmission electron microscopy, scanning transmission electron microscopy ( STEM) and electron energy-loss spectroscopy (EELS). In the present study, we have introduced a methodology to detect lithium in solid materials, particularly for cathode active materials used in lithium-ion battery. The chemical states of lithium were isolated and analyzed from the overlapping multiple spectral profiles, using a suite of STEM, EELS and hyperspectral image analysis. The method was successfully applied in the chemical state analyses of hetero-phases near the surface and grain boundary regions of the active material particles formed by chemical reactions between the electrolyte and the active materials.

    DOI: 10.1093/jmicro/dfw038

    Web of Science

  11. Control of HAp Formation and Osteoconductivity on Nitrogen-Doped TiO2 Scale Formed by Oxynitridation of Ti Reviewed

    M. Hashimoto, S. Kitaoka, Y. Obata, S. Muto, T. Ogawa, M. Furuya, H. Kanetaka

    Key Engineering Materials   Vol. 758   page: 86-89   2017

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  12. Unmixing hyperspectral data by using signal subspace sampling Reviewed

    J. Spiegelberg, S. Muto, M. Ohtsuka, K. Pelckmans, J. Rusz

    Ultramicroscopy   Vol. 182   page: 205-211   2017

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)  

  13. Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface Reviewed

    T. Thersleff, S. Muto, M. Werwinski, J. Spiegelberg, Y. Kvashnin, B. Hjorvarsson, O. Eriksson, J. Rusz, K. Leifer

    SCIENTIFIC REPORTS   Vol. 7   page: 44802   2017

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)  

  14. Microscopic origin of ultra-low friction coefficient between the wear track formed on carbon nitride coating and transfer layer on sliding ball in friction tests under dry N2 Reviewed

    H. Inoue, S. Muto, S. Arai, H. Wasada, N. Umehara

    Surface &Coating Technology   Vol. 313   page: 31-39   2017

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)  

  15. Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution Reviewed

    J. Rusz, J. Spiegelberg, S. Muto, T. Thersleff, M. Ohtsuka, K. Leifer, P. M. Oppene

    PHYSICAL REVIEW B   Vol. 95   page: 174412   2017

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)  

  16. In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum-cation diffusion observations Reviewed

    F. Gualandris, S. B. Simonsen, J. B. Wagner, S. Sanna, S. Muto, L. Theil Kuhn

    ECS Transactions   Vol. 75   page: 123-133   2017

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  17. High-precision quantitative atomic-site-analysis of functional dopants in crystalline materials by electron-channelling-enhanced microanalysis Reviewed

    S. Muto, M. Ohtsuka

    Progress in Crystal Growth and Characterization of Materials   Vol. 63   page: 40-61   2017

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Presentations 129

  1. 固体電池におけるLATP/LCO界面で何が起こっているか-断面STEM-EELS解析でここまでわかる- Invited

    武藤俊介

    日本化学会第101春季年会(2021)新学術領域研究「蓄電固体界面科学」成果報告会  2021.3.20  日本化学会 新学術領域研究「蓄電固体界面科学」

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    Event date: 2021.3.20

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:オンライン開催   Country:Japan  

  2. 固体電池におけるLATP/LCO界面で何が起こっているか-断面STEM-EELS解析でここまでわかる- Invited

    武藤俊介

    日本化学会第101春季年会(2021)新学術領域研究「蓄電固体界面科学」成果報告会  2021.3.20  日本化学会 新学術領域研究「蓄電固体界面科学」

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    Event date: 2021.3.20

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:オンライン開催   Country:Japan  

  3. 反応科学超高圧走査透過電子顕微鏡の最前線 Invited

    武藤俊介

    ナノプローブテクノロジー第167委員会第94回研究会  2020.9.14  日本学術振興会第167委員会

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    Event date: 2020.9.14

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:オンライン開催   Country:Japan  

  4. 反応科学超高圧走査透過電子顕微鏡の最前線 Invited

    武藤俊介

    ナノプローブテクノロジー第167委員会第94回研究会  2020.9.14  日本学術振興会第167委員会

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    Event date: 2020.9.14

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:オンライン開催   Country:Japan  

  5. 名古屋大学反応科学超高圧走査透過電子顕微鏡の新展開 Invited

    武藤俊介

    日本顕微鏡学会第76回学術講演会  日本顕微鏡学会

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    Event date: 2020.5.25 - 2020.5.27

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:大阪   Country:Japan  

  6. 実験データ解析に機械学習は本当に有効か? Invited

    武藤俊介

    日本顕微鏡学会第76回学術講演会  日本顕微鏡学会

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    Event date: 2020.5.25 - 2020.5.27

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:大阪   Country:Japan  

  7. 名古屋大学反応科学超高圧走査透過電子顕微鏡の新展開 Invited

    武藤俊介

    日本顕微鏡学会第76回学術講演会  日本顕微鏡学会

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    Event date: 2020.5.25 - 2020.5.27

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:大阪   Country:Japan  

  8. 実験データ解析に機械学習は本当に有効か? Invited

    武藤俊介

    日本顕微鏡学会第76回学術講演会  日本顕微鏡学会

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    Event date: 2020.5.25 - 2020.5.27

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:大阪   Country:Japan  

  9. 電子チャネリングを利用した元素/サイト選択的化学分析

    武藤俊介, 大塚真弘

    日本顕微鏡学会第75回学術講演会 

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    Event date: 2019.6.16 - 2019.6.19

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋国際会議場   Country:Japan  

  10. STEM-EELSハイパースペクトル像解析による無染色ポリマーイメージング

    武藤俊介

    日本顕微鏡学会第75回学術講演会 

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    Event date: 2019.6.16 - 2019.6.19

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋国際会議場   Country:Japan  

  11. テンソル分解法によるハイパースペクトル像解析の進展

    武藤俊介

    人工知能学会第2種研究会 計測インフォマティクス研究会 

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    Event date: 2019.3.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:物質・材料研究機構   Country:Japan  

  12. 今EELS分析をどう考えるか

    武藤俊介

    Gatan製品技術セミナー2019 

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    Event date: 2019.2.22

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:品川シーズンテラスカンファレンス   Country:Japan  

  13. Operando study of catalytic reactions by environmental HVEM equipped with Q-mass spectrometry International conference

    S.Muto

    EM CHINA 2018 

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    Event date: 2018.10.23 - 2018.10.27

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:CHENGDU XIYUE HOTEL, Chengdu, China   Country:China  

  14. Application of Machine Learning Techniques to Electron Microscopy/Spectroscopy Image Data International conference

    S.Muto

    ACSIN-14&ICSPM26 

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    Event date: 2018.10.21 - 2018.10.25

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Sendai International Center, Japan   Country:Japan  

  15. 分光スペクトルデータへのインフォマティクス応用とその課題

    武藤俊介

    日本セラミックス協会第31回秋季シンポジウム 

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    Event date: 2018.9.5 - 2018.9.7

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋工業大学   Country:Japan  

  16. Development of new environmental high-voltage transmission electron microscope equipped with quadrupole mass spectrometer for observing catalytic reactions International conference

    S.Muto

    International conference on Mass Spectrometry and Proteomics 2018  

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    Event date: 2018.6.25 - 2018.6.27

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Finnstown Castle Hotel, Dublin, Ireland   Country:Ireland  

  17. 構造化データ融合法によるテンソル分解を適用したハイパー顕微分光データから

    武藤俊介

    日本顕微鏡学会高分解能分科会 

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    Event date: 2018.2.23 - 2018.2.24

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:マホロバ・マインズ三浦   Country:Japan  

  18. ハイパー分光像データからの情報抽出法開発の現状

    武藤俊介

    日本学術振興会マイクロビームアナリシス第141委員会第171回研究会 

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    Event date: 2018.2.22 - 2018.2.23

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東京理科大学森戸記念館   Country:Japan  

  19. 未来社会を支えるエネルギーとマテリアル研究に超高圧電子顕微鏡の果たす役割

    武藤俊介

    第7回エネルギー・マテリアル融合領域シンポジウム 

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    Event date: 2018.1.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:北海道大学   Country:Japan  

  20. ナノ電子顕微分光への情報処理技法の応用

    武藤俊介

    第46回薄膜・表面物理基礎講座2017 

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    Event date: 2017.11.17

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋大学VBLホール   Country:Japan  

  21. In situ observation of catalytic reactions under gas atmosphere by reaction science high-voltage scanning transmission electron microscope equipped with quadrupole mass spectrometer International conference

    S.Muto

    The 3rdEast-Asia Microscopy Conference (EAMC3) 

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    Event date: 2017.11.7 - 2017.11.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:BEXCO in Busan, Korea   Country:Korea, Republic of  

  22. ハイパー分光スペクトルイメージデータによる化学イメージング-情報統計学によるデータ処理を正しく使うために-

    武藤俊介

    第7回CSJ化学フェスタ2017 

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    Event date: 2017.10.17 - 2017.10.19

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:タワーホール船堀   Country:Japan  

  23. 情報統計処理による信号抽出法の基礎

    武藤俊介

    第33回分析電子顕微鏡討論会 

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    Event date: 2017.9.5 - 2017.9.8

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:幕張メッセ国際会議場   Country:Japan  

  24. Signal mining for chemical imaging from hyperspectral image data International conference

    S.Muto

    3rd International Workshop on TEM Spectroscopy in Materials Science 

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    Event date: 2017.6.19 - 2017.6.22

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:S. Muto   Country:Sweden  

  25. Hyperspectral Image Analysis of Spatially/Spectrally Overlapped Datasets for Chemical Imaging International conference

    S.Muto

    The 19th Scientific International Symposium on SIMS and Related Techniques Based on Ion-Solid Interactions(SISS19) 

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    Event date: 2017.5.11 - 2017.5.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Miyako Messe, Kyoto   Country:Japan  

  26. Multi-Way Hyperspectral Image Analysis Based on Scanning Transmission Electron Microscopy and Associated Spectroscopic Methods International conference

    S.Muto

    2017MRS Spring Meeting & Exhibit 

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    Event date: 2017.4.17 - 2017.4.21

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Phonix Convention Center and Sheraton Grand Phoenix   Country:United States  

  27. ビッグデータ時代の微細構造解析支援-トップサイエンスと実材料分析-

    武藤俊介

    共用・計測合同シンポジウム2017 先端計測けんきゅうと共用推進による材料イノベーション 

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    Event date: 2017.3.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:物質・材料研究機構   Country:Japan  

  28. 新しい情報・統計理論に基づくスペクトル分解―化学イメージング法の開発

    武藤俊介

    Spring-8材料構造の解析に役立つ計算科学研究会(第3回)/第10回Spring-8先端利用技術ワークショップ 

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    Event date: 2017.2.27

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:㈱ニチイ学館神戸ポートアイランドセンター   Country:Japan  

  29. ナノ電子顕微分光への情報処理技法の応用

    武藤俊介

    「先端計測インフォマティクス 大量データ時代の情報活用」ワークショップ 

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    Event date: 2017.1.19

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:物質・材料研究機構   Country:Japan  

  30. 複合電子顕微分光と情報統計処理による機能元素/物性定量分析-Two-wayからMulti-way解析へ、ナノ材料から宇宙へ-

    武藤俊介

    日本金属学会2016年秋期(第159回)講演大会 

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    Event date: 2016.9.21 - 2016.9.23

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:大阪大学豊中キャンパス   Country:Japan  

  31. Mechanical and spatial/electronic structural changes of lonic bonded materials associated with particle irradiation damage International conference

    S.Muto

    Workshop on Experimental Cosmochemistry 2016 

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    Event date: 2016.6.26

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  32. ナノ電子分光への情報処理技法の応用 

    武藤俊介

    第二回元素プロジェクト<研究拠点形成型>/大型研究施設連携シンポジウム「局所構造制御で物質から材料へ 

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    Event date: 2016.1.22

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東京大学伊藤国際学術研究センター   Country:Japan  

  33. Current progress in nanometric magnetic moment measurements based on electron magnetic circular dichroism International conference

    S.Muto, J. Rusz, K. Tatsumi, T. Thersleff, K. Leiffer

    Magnetics and Optics Research International Symposium 2015 (MORIS2015) 

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    Event date: 2015.11.29 - 2015.12.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Malaysia  

  34. Current progress in a data mining technique applying to digital spectral image datasets International conference

    S. Muto, M. Shiga, K. Tatsumi, K. Tsuda

    ALC'15 

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    Event date: 2015.10.25 - 2015.10.30

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  35. Mind the Noise: Mining Hidden Information from Spectroscopic datasets International conference

    S. Muto

    NIMS Conference 2015 

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    Event date: 2015.7.14 - 2015.7.16

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  36. Application of EDX Spectroscopy International conference

    S. Muto

    The 2th Uppsala TEM spectroscopy workshop (HMK2015) 

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    Event date: 2015.5.18 - 2015.5.20

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Sweden  

  37. Recent development of EMCD technique: toward spin nanoscopy using STEM-EELS International conference

    S. Muto

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    Event date: 2015.4.30

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Croatia  

  38. Quantitative element/site-selective microanalysis using high-angular resolution electron channeled X-ray/electron spectroscopy International conference

    The 3th Croatian Microscopy Congress (HMK2015) 

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    Event date: 2015.4.26 - 2015.4.29

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:the Hotel Adriana   Country:Croatia  

  39. 複合電子顕微分光法の開発と実材料分析への応用の現状 

    武藤俊介

    新学術領域研究第2回公開シンポジウム 

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    Event date: 2015.3.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋大学環境総合館レクチャーホール   Country:Japan  

  40. エネルギー関連機能材料のナノオーダー解析-電池・触媒のSTEM分光マッピングを中心に- 

    武藤俊介

    2014JEOL先端材料解析ソリューションセミナー 

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    Event date: 2014.11.14

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:グランドティアラ名古屋駅前   Country:Japan  

  41. ナノ電子状態解析のフロンティア開拓と実材料分析への応用 

    武藤俊介

    日本金属学会2014年度秋期講演大会 

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    Event date: 2014.9.24 - 2014.9.26

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:名古屋大学東山キャンパス   Country:Japan  

  42. STEM spectroscopic analysis of white-luminescent nano structures International conference

    セミナー 

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    Event date: 2014.9.4

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:ストックホルム大学   Country:Sweden  

  43. 電子磁気円二色性に基づくナノ領域磁気角運動量定量測定

    武藤俊介

    第30回分析電顕討論会 

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    Event date: 2014.9.2 - 2014.9.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:幕張メッセ国際会議場   Country:Japan  

  44. Digital Micrograph スクリプティング事始め

    武藤俊介

    2014年夏の電子顕微鏡解析技術フォーラム  

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    Event date: 2014.8.27 - 2014.8.28

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:時之栖   Country:Japan  

  45. 超高圧電子顕微鏡による新たなナノ物性測定の可能性

    武藤俊介

    日本顕微鏡学会第70回記念学術講演会 

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    Event date: 2014.5.8 - 2014.5.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:幕張メッセ国際会議場   Country:Japan  

  46. Recent development of EMCD technique:toward spin nanoscopy using STEM-EELS

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    Event date: 2014.4.16

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  47. 超高圧STEMによるナノ磁性材料の電子磁気円二色性定量測定

    武藤俊介, 巽一厳, Jan Rusz, 荒井重勇

    第74回応用物理学会秋季学術講演会 

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    Event date: 2013.9.16 - 2013.9.20

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:同志社大学京田辺キャンパス   Country:Japan  

  48. Element/Site-Selective Microanalysis UsingHigh-Angular Resolution Electron Channeled X-ray/Electron/Light Spectroscopy International conference

    The 4th International Symposium on Advanced Microscopy and Theoretical Calculations(AMTC) 

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    Event date: 2013.7.7 - 2013.7.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:ACT CITY HAMAMATSU Congress Center   Country:Japan  

  49. 電子顕微鏡による炭素系非晶質膜のミクロ構造と結合状態のキャラクタリゼーション 

    武藤俊介

    第93回東海トライボロジー研究会 

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    Event date: 2013.6.19

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名城大学   Country:Japan  

  50. グリーンビーグル材料の特性と局所電子状態可視化 

    武藤俊介

    第152回日本金属学会2013年春期大会 

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    Event date: 2013.3.27

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:東京理科大学   Country:Japan  

  51. SEM反射電子像コントラストの動力学的電子回析理論による解釈の試み

    武藤俊介

    日本顕微鏡学会第69回学術講演会 

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    Event date: 2013.3.20 - 2013.3.22

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:ホテル阪急エキスポパーク   Country:Japan  

  52. 電子顕微鏡による電池材料分析への取り組みについて

    武藤俊介

    日本学術振興会材料の微細組織と機能性第133委員会第217回研究会 

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    Event date: 2013.3.18

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東京理科大学   Country:Japan  

  53. 多変量スペクトル分解法のスペクトラムイメージングへの応用

    武藤俊介

    平成24年度日本表面科学会関西支部セミナー 

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    Event date: 2013.2.19

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:産総研関西センター   Country:Japan  

  54. S/TEMにおける分析の極意-電子遷移の過程を知ろう-

    武藤俊介

    2013年新春電子顕微鏡解析技術フォーラム 

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    Event date: 2013.1.25

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:日本電子株式会社大手町野村ビル   Country:Japan  

  55. 高分解能電子エネルギー損失分光法

    武藤俊介

    第16回VBLシンポジウム 

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    Event date: 2012.12.4

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋大学フロンティアプラザ ベンチャーホール   Country:Japan  

  56. 複合電子分光S/TEMで探る不均一触媒の局所電子状態マッピング

    武藤俊介 他

    日本顕微鏡学会第56回シンポジウム「ソフト・ハードマターの多様性を観る」 

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    Event date: 2012.11.19 - 2012.11.20

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:北海道大学学術交流会館   Country:Japan  

  57. 動力学回折理論の基礎とSEMへの適用

    武藤俊介

    「SEMの物理科学」研究部会 合宿幹事会 

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    Event date: 2012.10.13 - 2012.10.14

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:日本電子 山中湖保養所ジュラク荘   Country:Japan  

  58. 酸化物の定量解析

    武藤 俊介

    電子顕微鏡解析技術フォーラム 

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    Event date: 2012.9.1

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:琵琶湖リゾートクラブ   Country:Japan  

  59. A new method for extracting EMCD signals from spectrum diffraction datacube using a multivariate curve resolution technique International conference

    武藤 俊介

    Workshop on EELS in Materials Science 

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    Event date: 2012.6.19

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Uppsala University   Country:Sweden  

  60. Extraction of Electron Magnetic Circular Dichroism from Energy-Filtered Nano-Diffraction by Multivariate Curve Resolution Technique International conference

    武藤 俊介

    The 3rd International Symposium on Advanced Microscopy and Theoretical Calculations(AMTC3) 

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    Event date: 2012.5.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Nagaragawa Convention Center   Country:Japan  

  61. 複合電子分光による物性画像診断とそのリチウム電池材料への応用

    武藤 俊介

    高分子分析研究懇談会第362回例会 

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    Event date: 2012.4.26

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:ゆうぽうと   Country:Japan  

  62. TEM-EELSによるパラメータフリー磁気円二色性測定法の開発

    武藤 俊介

    日本金属学会2012年度春期講演大会 

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    Event date: 2012.3.28

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:横浜国立大学   Country:Japan  

  63. エネルギー・環境材料と格子欠陥-分光TEMによる展開-

    武藤 俊介

    日本物理学会第67回年次大会 

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    Event date: 2012.3.25

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:関西学院大学   Country:Japan  

  64. Diagnostic STEM-EELS Analysis of Cathodes in Lithium-Ion Secondary Batteries International conference

    Shunsuke MUTO

    International Symposium on Role of Electron Microscopy in Industry-Toward genuine collaboration between academia and industry- 

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    Event date: 2012.1.19

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  65. サブナノ領域分光イメージング-最新TEM分析技術

    武藤 俊介

    金属学会鉄鋼協会東海支部若手材料研究会 第60回研究会「最新の分析評価技術」 

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    Event date: 2011.12.13

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東レ総合研修センター   Country:Japan  

  66. 今S/TEM-EELSの分析をどのように考えるべきか

    武藤 俊介

    学振141委員会研修セミナー「SEM,TEMにおける分光分析技術」 

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    Event date: 2011.12.1

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東レ総合研修センター   Country:Japan  

  67. 複合電子分光による機能元素電子状態解析

    武藤 俊介

    日本金属学会秋期大会(沖縄) S1:機能元素のナノ材料科学 

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    Event date: 2011.11.8

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:沖縄コンベンションセンター   Country:Japan  

  68. TEMを用いた分光法によるナノ機能評価の現状と今後

    武藤俊介

    東北大学金属材料研究所ワークショップ「分野融合型格子欠陥研究の発展にむけて」 

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    Event date: 2011.10.28

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東北大学金属材料研究所   Country:Japan  

  69. TEM法による蓄電池材料解析技術

    武藤俊介

    第21回格子欠陥フォーラム 

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    Event date: 2011.9.20

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:立山国際ホテル   Country:Japan  

  70. 化学状態から探るリチウムイオン二次電池正極の相分布マッピング

    武藤俊介

    分析電子顕微鏡討論会 

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    Event date: 2011.9.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:幕張メッセ   Country:Japan  

  71. Diagnostic STEM-EELS Analysis of Cathodes Degradation in Lithium-Ion Secondary Batteries International conference

    Shunsuke MUTO

    Microscopy & Microanalysis 2011 

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    Event date: 2011.8.9

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:United States  

  72. EELS データへの統計処理の応用‐化学状態分析の新しい展開

    武藤俊介

    日本顕微鏡学会関西支部特別企画講演会「産業基盤を支える顕微鏡」 

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    Event date: 2010.12.18

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  73. S/TEM分析データへの多変量解析の応用

    第三回日本電子TEMユーザーズミーティング 

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    Event date: 2010.12.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

    武藤俊介

  74. S/TEM像・分析データの信号処理による情報抽出

    武藤俊介

    日本顕微鏡学会・第54回シンポジウム,瀬藤賞受賞講演 

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    Event date: 2010.11.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  75. Statistical signal processing of S/TEM-EELS datasets–Extraction of information without reference– International conference

    Max Planck Institute, STEM group seminar 

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    Event date: 2010.9.13

    Language:English   Presentation type:Oral presentation (invited, special)  

  76. リチウム電池正極のSTEM-EELSイメージングによるナノ劣化解析とリチウム状態分析

    日本金属学会分科会シンポジウム 

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    Event date: 2010.7.29

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  77. スペクトラムイメージによるリチウムイオン二次電池正極の劣化解析

    武藤俊介

    日本顕微鏡学会第66回学術講演会 

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    Event date: 2010.5.26

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  78. 最先端電子顕微分光法の周辺-水素を見ることができるか-

    第3回「環境調和型水素製造システムにおける生成と吸蔵貯蔵の一体化研究会」 

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    Event date: 2009.11.25

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  79. 多変量スペクトル分解法によるSTEM-EELS化学結合マップ

    日本顕微鏡学会第53回シンポジウム 

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    Event date: 2009.10.31

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  80. Diagnostic analysis of Li ion secondary batteries by STEM-EELS/SI-MCR International conference

    Electrochemical laboratory seminar 

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    Event date: 2009.10.12

    Language:English   Presentation type:Oral presentation (invited, special)  

  81. S/TEM-EELSデータの統計処理による先端材料ナノ物性解析

    日本学術振興会 マイクロビームアナリシス第141委員会 09年度研究会 

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    Event date: 2009.9.29

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  82. 多変量スペクトル分解法の基礎とスペクトラムイメージングへの応用

    第25回分析電子顕微鏡討論会 

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    Event date: 2009.9.1

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  83. Diagnostic analysis of ion-beam induced nanostructures by S/TEM-EELS International conference

    XVIII International Materials Research Congress: Symposium 20:Beams and Materials: Ion Beams 

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    Event date: 2009.8.18

    Language:English   Presentation type:Oral presentation (invited, special)  

  84. TEM関連スペクトロスコピーによる情報抽出法

    武藤俊介

    金属学会セミナー「機能元素のナノ材料科学} 

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    Event date: 2009.7.24

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  85. 複合電子分光によるナノテク実材料のナノ領域特性画像診断

    武藤俊介

    第56回応用物理学関係連合講演会 

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    Event date: 2009.3.31

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  86. 複合電子分光による機能元素分析

    武藤俊介

    日本金属学会第143回秋期大会 基調講演 

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    Event date: 2008.9.23

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  87. Combined Electron Spectroscopy and Imaging Associated with (S)TEM Application of Multivariate Curve Resolution

    The 1st International Symposium on Advanced Microscopy and Theoretical Calculations 

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    Event date: 2008.6.30

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  88. 電子顕微鏡におけるX線マイクロアナリシスへの期待

    武藤 俊介

    島津製作所第25回記念マイクロアナリシス研究懇談会 

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    Event date: 2007.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  89. Electronic state analysis of implanted nitrogen in visible-light response TiO2 photocatalyst by TEM-EELS

    Lattice Defects Forum, The Doyama Symposium on Advanced Materials, “Materials to Save Humankind: The Dream, Creativity, and Working Toward its Realization" 

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    Event date: 2007.9

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  90. 複合電子分光TEMによる局所領域電子状態解析の最近の進展

    武藤 俊介

    豊田中研講演会「微細(界面)構造観察から計算科学へ」 

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    Event date: 2007.8

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  91. 電子定在波を利用した原子位置選択的電子状態測定

    武藤俊介、巽 一厳

    日本顕微鏡学会第63回学術講演会 

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    Event date: 2007.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  92. EELS微細構造の先端解析とその材料科学への応用

    武藤俊介

    日本顕微鏡学会関西支部平成18年度特別講演会 

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    Event date: 2006.7

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  93. ナノ計測と電子状態評価

    武藤俊介

    日本金属学会春期(第138回)大会 基調講演 

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    Event date: 2006.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  94. ナノグラファイトの構造・機能評価-秩序と無秩序の間

    武藤 俊介

    日本物理学会第61回年次大会 

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    Event date: 2006.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  95. セラミックス関連材料のTEM-EELSによる先端解析

    武藤俊介

    学振先進セラミックス第124委員会 

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    Event date: 2006.1

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  96. 計算科学による材料科学研究-変形,局所振動モード,同位体効果-

    武藤俊介,巽一厳

    富士通分子動力学ソフト新バージョン発表セミナー 

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    Event date: 2006.1

    Language:Japanese  

  97. 透過電子顕微鏡に付随した電子分光法で何ができるか

    武藤俊介

    新しい触媒・素材開発のためのin-situ計測・分析技術・第一回講演 

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    Event date: 2005.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  98. 内殻励起吸収端微細構造を利用した実・逆空間構造解析

    武藤 俊介

    日本顕微鏡学会第50回シンポジウム 

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    Event date: 2005.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  99. TEM-EELS法による材料中の水素検出法の開発

    武藤俊介

    第15回格子欠陥フォーラム 

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    Event date: 2005.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  100. 電子チャネリングEELSによる原子サイト選択的電子状態分析

    武藤俊介

    第21回分析電子顕微鏡討論会 

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    Event date: 2005.8

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  101. TEM-EELS structural analysis of oxygen-related defect complexes in semiconductors surfaces International conference

    2005 Symposium on Materials & Systems for Energy Conversion, “Development and Microstructural Analysis for Energy Related Materials" 

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    Event date: 2005.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  102. Detection of hydrogen states in hydrogenated nanostructured graphite with EELS International conference

    8th Asia-Pacific Electron Microscopy Conference (APEM-8) 

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    Event date: 2004.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  103. Hydrogen State in Hydrogenated Nanostructured Grphite Studied with TEM-EELS International conference

    5th KIM-JIM Symposium on Recent Advances in Energy Materials and Nano-Characterization 

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    Event date: 2003.10

    Language:English   Presentation type:Oral presentation (invited, special)  

  104. EELS with Green Sauce International conference

    Annual Meeting of Belgian Electron Microscopy Society 

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    Event date: 2003.5

    Language:English   Presentation type:Oral presentation (invited, special)  

  105. EELS Characterization of defect structures in light element materials

    First Kyoto Int'l Symp. on Computational Materials Science 

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    Event date: 2003.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  106. Maximum entropy spectral analysis of extended energy-loss fine structure and its application to time-resolved measurements

    Int'l Symp. on In-Situ Electron Microscopy 

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    Event date: 2003.1

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  107. 構造相変態における格子振動モードと点欠陥

    武藤 俊介

    WinMASPHYCフォーラム 

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    Event date: 2002.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  108. 高エネルギー粒子線照射による共有結合性非晶質のEELSによる構造解析

    武藤 俊介

    日本電子顕微鏡学会第58回学術講演会 

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    Event date: 2002.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  109. 電子チャネリングを利用した元素/サイト選択的化学分析 International conference

    武藤俊介, 大塚真弘

    日本顕微鏡学会第75回学術講演会  2019.6.16 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋国際会議場  

  110. 構造化データ融合法によるテンソル分解を適用したハイパー顕微分光データから International conference

    武藤俊介

    日本顕微鏡学会高分解能分科会  2018.2.23 

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    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:マホロバ・マインズ三浦  

  111. 未来社会を支えるエネルギーとマテリアル研究に超高圧電子顕微鏡の果たす役割 International conference

    武藤俊介

    第7回エネルギー・マテリアル融合領域シンポジウム  2018.1.11 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:北海道大学  

  112. 新しい情報・統計理論に基づくスペクトル分解―化学イメージング法の開発 International conference

    武藤俊介

    Spring-8材料構造の解析に役立つ計算科学研究会(第3回)/第10回Spring-8先端利用技術ワークショップ  2017.2.27 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:㈱ニチイ学館神戸ポートアイランドセンター  

  113. 情報統計処理による信号抽出法の基礎 International conference

    武藤俊介

    第33回分析電子顕微鏡討論会  2017.9.5 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:幕張メッセ国際会議場  

  114. 分光スペクトルデータへのインフォマティクス応用とその課題 International conference

    武藤俊介

    日本セラミックス協会第31回秋季シンポジウム  2018.9.5 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋工業大学  

  115. 今EELS分析をどう考えるか International conference

    武藤俊介

    Gatan製品技術セミナー2019  2019.2.22 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:品川シーズンテラスカンファレンス  

  116. ビッグデータ時代の微細構造解析支援-トップサイエンスと実材料分析- International conference

    武藤俊介

    共用・計測合同シンポジウム2017 先端計測けんきゅうと共用推進による材料イノベーション  2017.3.9 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:物質・材料研究機構  

  117. ハイパー分光像データからの情報抽出法開発の現状 International conference

    武藤俊介

    日本学術振興会マイクロビームアナリシス第141委員会第171回研究会  2018.2.22 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:東京理科大学森戸記念館  

  118. ハイパー分光スペクトルイメージデータによる化学イメージング-情報統計学によるデータ処理を正しく使うために- International conference

    武藤俊介

    第7回CSJ化学フェスタ2017  2017.10.17 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:タワーホール船堀  

  119. ナノ電子顕微分光への情報処理技法の応用 International conference

    武藤俊介

    第46回薄膜・表面物理基礎講座2017  2017.11.17 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋大学VBLホール  

  120. ナノ電子顕微分光への情報処理技法の応用 International conference

    武藤俊介

    「先端計測インフォマティクス 大量データ時代の情報活用」ワークショップ  2017.1.19 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:物質・材料研究機構  

  121. テンソル分解法によるハイパースペクトル像解析の進展 International conference

    武藤俊介

    人工知能学会第2種研究会 計測インフォマティクス研究会  2019.3.6 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:物質・材料研究機構  

  122. STEM-EELSハイパースペクトル像解析による無染色ポリマーイメージング International conference

    武藤俊介

    日本顕微鏡学会第75回学術講演会  2019.6.16 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋国際会議場  

  123. Signal mining for chemical imaging from hyperspectral image data

    S.Muto

    3rd International Workshop on TEM Spectroscopy in Materials Science  2017.6.19 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:S. Muto  

  124. Operando study of catalytic reactions by environmental HVEM equipped with Q-mass spectrometry

    S.Muto

    EM CHINA 2018  2018.10.23 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:CHENGDU XIYUE HOTEL, Chengdu, China  

  125. Multi-Way Hyperspectral Image Analysis Based on Scanning Transmission Electron Microscopy and Associated Spectroscopic Methods

    S.Muto

    2017MRS Spring Meeting & Exhibit  2017.4.17 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Phonix Convention Center and Sheraton Grand Phoenix  

  126. In situ observation of catalytic reactions under gas atmosphere by reaction science high-voltage scanning transmission electron microscope equipped with quadrupole mass spectrometer

    S.Muto

    The 3rdEast-Asia Microscopy Conference (EAMC3)  2017.11.7 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:BEXCO in Busan, Korea  

  127. Hyperspectral Image Analysis of Spatially/Spectrally Overlapped Datasets for Chemical Imaging

    S.Muto

    The 19th Scientific International Symposium on SIMS and Related Techniques Based on Ion-Solid Interactions(SISS19)  2017.5.11 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Miyako Messe, Kyoto  

  128. Development of new environmental high-voltage transmission electron microscope equipped with quadrupole mass spectrometer for observing catalytic reactions

    S.Muto

    International conference on Mass Spectrometry and Proteomics 2018  2018.6.25 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Finnstown Castle Hotel, Dublin, Ireland  

  129. Application of Machine Learning Techniques to Electron Microscopy/Spectroscopy Image Data

    S.Muto

    ACSIN-14&ICSPM26  2018.10.21 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Sendai International Center, Japan  

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Research Project for Joint Research, Competitive Funding, etc. 25

  1. 反応ガス中触媒活性サイトの環境TEM解析

    2019.07 - 2020.04

    国内共同研究 

  2. 透過電子顕微鏡によるサイト占有率測定技術の伝授

    2018.11 - 2020.03

    企業からの受託研究 

  3. 反応ガス中触媒活性サイトの環境TEM解析

    2018.07 - 2019.05

    国内共同研究 

  4. 情報科学活用による電子・磁気状態の定量評価手法の開発

    2018.07 - 2019.03

    企業からの受託研究 

  5. 電子顕微鏡を用いた分光法のための新解析システムの開発

    2018.06 - 2019.03

    国内共同研究 

  6. 情報科学活用による電子・磁気状態の定量評価手法の開発

    2018.05 - 2019.03

    国内共同研究 

  7. STEM-EELSによる材料の状態マッピング技術の開発

    2018.04 - 2019.03

    国内共同研究 

  8. 機能性材料の微量元素置換サイト計測に関する研究

    2017.05 - 2018.03

    国内共同研究 

  9. コンピュータ演算による原子レベル構造解析技術の高度化

    2017.04 - 2019.03

    国内共同研究 

  10. 電子顕微鏡及びそれに付随した分光法とそれぞれを用いた材料評価技術

    2016.04 - 2018.05

    国際共同研究 

  11. 磁石材料の微量元素置換サイト計測に関する研究

    2015.07 - 2017.03

    国内共同研究 

  12. Research on Advanced EELS analysis and simulation technique using high energy resolution TEM

    2012.12 - 2014.11

    International Cooperative Research 

  13. 数値処理によるEELSスペクトルの解析技術

    2010.04 - Now

    企業からの受託研究 

  14. 固体構造の評価手法および解析手法の開発

    2010.04 - Now

    企業からの受託研究 

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    分析機能を有する電子顕微鏡を用いた固体構造解析に関する技術指導

  15. 電子顕微鏡及びそれに付随した分光法とそれを用いた材料評価技術の研究

    2010.04 - Now

    企業からの受託研究 

  16. STEM-EELS及び新規信号処理技術を用いた次世代電池材料の解析

    2009.04 - 2011.03

    企業からの受託研究 

  17. アルミニウム系水素化物における微細構造と反応機構

    2009.04 - 2010.03

    国内共同研究 

  18. ベイナイト変態及び析出に関する基礎研究

    2008.10 - 2011.03

    企業からの受託研究 

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    鉄鋼中の炭化物や酸化物、或いはその他元素分析のための新しい電子顕微鏡X線分光 法技術の開発研究、並びに関連する電子顕微鏡用のソフト開発研究。

  19. TEM-WDS/EELSを用いた局所活性点の状態解析

    2007.05 - Now

    企業からの受託研究 

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    化学反応を促進させる触媒として酸化物セラミックスに担持した貴金属微粒子は排気ガス浄化などの産業的に重要な役割を担っている。一方これらの触媒開発は試行錯誤の域を出ておらず、その触媒活性発現に特有な化学結合状態を解析することが喫緊の課題である。実触媒では活性点である貴金属は様々な状態分布を持っており、これらの状態分布を解析し、分布領域毎の貴金属活性を調査することは、将来の触媒研究/材料設計にとって重要である。しかし、既存の解析手法では平均的な情報は得られるが局所的な情報を得ることが困難である。本研究では、TEM-WDS/EELSを用いて局所的な構造を解析する技術を確立し、自動車触媒への応用を研究する。

  20. 電子顕微鏡データ解析技術に関する研究

    2007.05 - 2008.03

    企業からの受託研究 

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    電子顕微鏡で観察した原子配列画像や電子線エネルギー損失分光データに対し、ベイズ定理に基づく画像復元法(PIXON法)を使ってノイズや歪みを低減して画像やスペクトルを復元する。この技術を非晶質材料の局所状態解析やナノ構造合金材料の表面電子状態解析に適用することでその機能発現メカニズムを明らかにする。

  21. 微細組織及び遷移金属価数解析に関する研究

    2007.04 - 2010.03

    企業からの受託研究 

  22. PZT薄膜圧電素子の通電による特性劣化メカニズム解析

    2006.10 - 2012.03

    企業からの受託研究 

  23. 金属中の水素イメージング法の開発とその鉄鋼材料における水素脆性個所直接診断への応用

    2006.04 - 2008.03

    企業からの受託研究 

  24. 電子チャネリングを利用した元素・原子位置選択的電子状態計測法の開発と応用

    2005.10 - 2007.03

    大幸財団 

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    Grant type:Competitive

    本研究は、ナノサイズ電子ビームを用いて固体中のブロッホ波を選択的に励起すること(電子チャネリング)によって、局所領域で特定の原子面上の特定の元素の電子状態を高エネルギー電子分光法で計測するという独自のものである。

  25. 新しい統計的手法(ウェーブレット変換法)を導入した電子エネルギー損失広域微細構造解析による非品質(ガラス)局所構造の決定

    2000.04 - 2001.03

    中部電力基礎技術研究所 

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    Grant type:Competitive

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KAKENHI (Grants-in-Aid for Scientific Research) 25

  1. 逆空間走査多元分光による局在機能欠陥の高分解能立体構造/状態分析

    2014.04 - 2018.03

    科学研究費補助金  基盤研究(A)

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    Authorship:Principal investigator 

    本研究の目的は,ナノ電子プローブを用いたビームロッキング下での複数電子分光(EELS, EDX,WDX, CL)に基づく新しい「立体的かつ定量」ナノ領域スペクトロスコピーを確立し,表面・界面を含む様々な格子欠陥の局所構造・機能解析に応用することである.本手法は,本来電子顕微鏡が持つ高い角度分解能を利用して,逆空間座標に依存する蛍光/吸収スペクトル情報を収集・解析するため,元素/原子サイト選択的であり,従来の二次元実空間結像/マッピングに比べ高精度の定量性を持つ.また周期構造から逸脱した格子特異点の選択的分析によって機能性材料分析への応用の道を拓く.特にナノ領域発光によるイオン化チャネリングパターン(ICP)解析に力点を置き,STEM分光法の三次元・空間/エネルギー分解能の飛躍的向上を目指す.

  2. ナノ電子状態解析のフロンティア開拓

    2013.06 - 2018.03

    科学研究費補助金  新学術領域研究(領域提案型) 計画班

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    Authorship:Principal investigator 

    ナノ電子プローブを用いた分光法,すなわち電子エネルギー損失分光(EELS:伝導帯DOS),カソードルミネッセンス(CL:バンド間遷移)と軟X線発光分光(SXES:価電子帯DOS)を集約し,動力学的回折条件によるブロッホ波の対称性を利用して,ナノ構造を内包する試料の電子状態・光学的性質・磁性を,「ナノ分解能で,同じ場所から同時に,かつ元素・サイト選択的に」測定する.そして得られたデータをA01(ア)およびA02(エ)と共同で統計処理することで多角的な情報抽出を行い,共通の分光的特徴を持つ領域の空間分布の可視化を通じて「高角度分解能・多元電子分光」という新たな格子特異点の定量分析法を開拓する.

  3. 複合電子分光顕微鏡による金属酸化物中のサブナノメートル欠陥の性質と構造

    2002.04 - 2005.03

    科学研究費補助金  基盤研究(B),課題番号:14350340

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    Authorship:Principal investigator 

  4. 軟X線領域複合電子分光が拓く高空間・エネルギー分解能物性診断

    2005.04 - 2009.03

    科学研究費補助金  基盤研究(A),課題番号:17206063

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    Authorship:Principal investigator 

  5. 複合電子分光による機能元素電子状態解析

    2007.08 - 2012.03

    科学研究費補助金  特定領域研究 19053004

    武藤 俊介

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    Authorship:Principal investigator 

    高エネルギー電子をプローブとして、ナノサイズ格子特異点領域に配置した機能元素における電子状態を定量的に計測・評価そして可視化する.

  6. 多元スペクトラムイメージによるナノ光学材料分析法の開発と応用

    2009.04 - 2012.03

    科学研究費補助金  基盤研究(B)

    武藤俊介

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    Authorship:Principal investigator 

    本研究の目的は,高エネルギーナノ電子プローブによって試料各点から得られる二種類以上かつ多数のスペクトルに対して統計学的処理による情報抽出を行い,ヘテロ構造を持つ機能材料の光学物性を1ナノメートルの空間分解能で可視化する技術を確立し,実用光学材料解析に応用することである.これまで基盤研究等による助成によって段階的に確立してきた「複合電子分光による画像物性診断」の要素技術開発の最終段階に当たり,ナノ領域発光測定と三(四)元解析法の開発がその主眼である.

  7. 理論・計算・データ科学による蓄電固体界面イオンダイナミクスの機構解明 International coauthorship

    Grant number:JP19H05815  2019.07 - 2024.03

    日本学術振興会  科学研究費補助金  新学術領域研究(研究領域提案型)

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    Authorship:Coinvestigator(s) 

  8. 質量分析機ー反応科学TEMによる新しい原子レベル触媒反応オペランド測定法の開発

    2019.07 - 2021.03

    科学研究費補助金  研究成果公開促進費 (研究成果公開発表)

    武藤 俊介

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    Authorship:Principal investigator 

  9. 質量分析機ー反応科学TEMによる新しい原子レベル触媒反応オペランド測定法の開発

    2019.07 - 2021.03

    科学研究費助成事業  挑戦的研究(萌芽)

    武藤 俊介

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    Authorship:Principal investigator  Grant type:Competitive

  10. Theoretical, Computational & Data Science Studies on Interface Ionics for Energy Storage

    Grant number:19H05815  2019.06 - 2024.03

    Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

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    Authorship:Coinvestigator(s) 

  11. 質量分析機-反応科学TEMによる新しい原子レベル触媒反応オペランド測定法の開発

    Grant number:19K22102  2019.06 - 2021.03

    挑戦的研究(萌芽)

    武藤 俊介

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    Authorship:Principal investigator 

    Grant amount:\6370000 ( Direct Cost: \4900000 、 Indirect Cost:\1470000 )

    本研究は,ガス化学反応をリアルタイム原子レベル観察でその場観察すると同時に反応に関与する供給ガス及び生成ガスを検出する新たなオペランド測定システムを構築し,触媒反応研究における議論の中心の一つである反応活性点の特定とそのダイナミクスの解明を目指すものである.触媒反応の観察に実績を持つ名古屋大学超高圧電子顕微鏡施設所有の反応科学超高圧走査透過型電子顕微鏡(RS-HVSTEM)に高感度四重極質量分析計を装着して原子分解能で触媒粒子を観察すると同時にガス分子を検出するのみならず,電子エネルギー損失分光データにインフォマティクス技法応用によって表面ガス吸着分子のイメージングを行う.
    本研究の目的は,ガス化学反応,特に表面触媒反応をリアルタイム原子レベル観察でその場観察すると同時に反応に関与する供給ガス及び生成ガスを検出する新たなオペランド測定システムを構築し,セラミックス担持金属微粒子触媒反応研究における議論の中心の一つである反応活性点の特定とそのダイナミクスの解明を目指すものである.
    本年度は、反応科学超高圧電子顕微鏡,RS-HVSTEMのガス環境セル排気ラインに電磁バルブを介して四重極質量分析計,QMS(JMS-Q1500)を設置し,外部環境(酸素,窒素,アルゴン,二酸化炭素など)から導入されるバックグラウンド強度を下げ,ガスセル内のすべてのガス種を効率よくQMSに引き入れるシステム開発を行った.
    次にシステム動作テストとして,これまで実際に化学反応その場観察してきたカーボンナノチューブ(CNT)上に散布したPd微粒子による酸素雰囲気中炭素燃焼(酸化過程)及びRh酸化物の加熱による金属化(還元反応)を実施し,TEM観察による組織変化と同時に生成ガス放出(CO2またはO2)が検出されることを確認することができた.
    更に,具体的応用事例として、実触媒における反応その場オペランド観察の実施した.試料として自動車排気ガス浄化でも困難とされている窒素酸化物還元のためのモデル触媒であるZrO2担持Rh微粒子を用い,温度上昇に伴う微粒子表面の原子分解能TEM観察と酸化還元反応生成ガスの検出が実際に可能なことを示した.各温度における反応生成ガスのQMSによって得られる放出曲線は,反応速度論方程式によってそのキネティクスを解析する事ができ,異なる反応温度でのデータから反応の活性化エネルギーを算出することが可能となった.本成果は,文部科学省ナノテクノロジープラットフォーム・微細構造解析プラットフォーム事業の一つとしても認定され,2019年度の秀でた利用成果・最優秀賞を受賞した.
    研究開始当初から,そもそもこのような微量ガス生成を検出できるか,という大きな問題設定であったが,様々な装置細部の改良によって,確かに電子顕微鏡に挿入した試料からの生成ガスを検知している確証が得られたことは大きな成果である.のみならず触媒反応の定常状態で起こっている金属微粒子の表面構造のダイナミカルな変化を原子レベルで捉えることができている.さらには質量分析計が刻々と記録するスペクトルの時間変化から,触媒反応がどのような機構で進行しているか、また各反応に伴う活性化エネルギーの定量算出が可能になったことは,まさしく触媒反応の研究に新たな扉を開きつつあるといって過言ではない.
    当初電子エネルギー損失分光法を併用して,金属微粒子表面の分析を行うことを想定していたが,超高圧電子顕微鏡施設における走査モード時の空間分解能の不足によって,化学イメージングによる反応活性点の同定や,吸着ガスの可視化には至っていない.しかしながら,原子レベル構造像自体に表面ガス吸着の情報が記録されていることが示唆され,実際のガス分子と表面構造が触媒反応時にどのように具体的に変化しているかを現在鋭意解析を進めているところである.
    次年度においては,質量分析計にガスクロマトグラフィーを追加し,発生しているガス種の正確な同定および定量にまで発展させたい.
    また前項でも述べた通り,高温(500-600℃)での触媒反応定常状態において,金属微粒子表面のダイナミクスが明らかになりつつある.しかし質量分析スペクトルの解析から,実際の触媒反応は低温側と高温側で二つのモードが存在することが示唆されている.そのため低温側でも原子レベル観察の記録動画の解析を進め,この触媒の反応機構の全容を明らかにする予定である.
    さらに新たな触媒開発のために,添加元素効果を並行して調査中であり,窒素酸化物の還元特性が実際に異なる金およびパラジウム添加のRh微粒子試料についてもこれまでと同様の実験を繰り返し,その詳細なメカニズムを明らかにすることが計画されている.

  12. Quantitative analysis of functional elements segregated in general ceramics grain boundaries using nano-electron probe spectroscopy

    Grant number:17K19101  2017.06 - 2019.03

    Grant-in-Aid for Challenging Research (Exploratory)

    MUTO SHUNSUKE

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    Authorship:Principal investigator 

    Grant amount:\6370000 ( Direct Cost: \4900000 、 Indirect Cost:\1470000 )

    This study aims to develop a robust scheme to identify the crystallographic sites where functional dopants segregated in general randomly-oriented grain boundaries occupy and their associated chemical states there by combining the dopant analysis using electron beam rocking and advanced spectral imaging techniques.
    we developed a beam controlling software to correct the aberrations of electromagnetic lens of TEM, which enables the incident electron beam to illuminate a sample with parallelly foucued on a area smaller than 100 nm in diameter.
    The present method applied to a Y-doped SrTiO3 grain boundary, and we successfully obtained the X-ray channeling signal from Y, suggesting that Y occupies particular atomic columns and also associated oxygen vacancies are introduced to compensate for the charge imbalance at the position next to the doped Y. The present results are summarized as a review report in the annual bulletin of Japan Institute of Metals.

  13. Exploration of nanostructure-property relationships for materials innovation

    Grant number:15K21748  2015.11 - 2018.03

    Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    TANAKA Isao

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

    This group encouraged many international activities of project members. This group supported publishing an open-access international book of our research summary, publishing a special issue in an international journal and providing a series of lectures on our studies. This group also supported young researches to collaborate with foreign researchers.

  14. Nano-level imaging of spin states by utilizing diffraction effects on inelastic electon scattering

    Grant number:15H04115  2015.04 - 2018.03

    Tatsumi Kazuyoshi

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

    The purpose of this study is development of element-selective spin state analysis with crystalline size required as small as 10 nm. We expect the developed method will be applied to nano-level imaging of spin states in spintronics materials. We consider the acquisition method of electron magnetic circular dichroism (EMCD) and electron magnetic linear dichroism (EMLD). On electron magnetic linear dichroism (EMLD), a significant spectral difference is obtained from a spinel-type oxide with largely spin-polarized. Electron magnetic circular dichroism with a specially designed EELS aperture is not realized, due to instability of the experimental apparatus. Through statistical analysis on measured Fe L2,3 EELS data, we confirm atomic plane resolution EMCD, which was theoretically proposed before the measurement. This means that we accomplish spin-state analysis with required sample crystalline size smaller than 10 nm.

  15. ベンチレータ型絞りによる逆空間選択的位相干渉スピンナノスコピーの試み

    2015.04 - 2017.03

    科学研究費補助金 

    武藤俊介

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    本研究の目的は,磁性材料を通過した高エネルギー電子の回折面上の特定領域における位相干渉効果(電子磁気円二色性:EMCD)を利用して,実材料への応用を意識した軌道/スピン角運動量の定量的高空間分解能分布像を得るための試みである.特に従来のEMCD測定と異なり,強く絞った収束電子を使用することにより,既に確立している円偏光放射光によるXMCDと同等のS/N比を実現し,測定時間も一桁以上短縮されることが期待される.元素戦略の一つの柱である希土類フリー磁石開発には微細構造制御がその鍵となっているが,磁性発現の基礎的理解のためには結晶粒界,微小析出物などにおけるナノ領域での磁気物性測定実用化が不可欠である.本研究はこの目標に直につながる簡便かつ効果的な測定法を世界に先駆けて提案したい.

  16. Atomic level and in-situ observation of battery-related materials by environmental high-voltage electron microscopy

    Grant number:26246006  2014.06 - 2018.03

    Tanaka Nobuo

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    Authorship:Coinvestigator(s) 

    In the present study, using an environmental high-voltage electron microscope, (1)lithium-related materials were studied under non-exposue-in-air conditions, (2)In-situ observations were performed with heating, applied voltages and various atomspheres in order to study degradation processes of the materials, and (3)various kinds of battery-related compounds were studied by STEM-electron energy loss spectroscopy for analysis of elemental distribution, and nano-probe electron diffraction mapping for study of local strain around interfaces of multi-layered structures.

  17. Development of local spin moment measurement method by electron magnetic chiral dichroism

    2014.06 - 2016.05

    Grant-in-Aid for Scientific Research 

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    Authorship:Principal investigator 

  18. High-resolution integrated spatial/electronic structure analysis of localized functional defects by multi-dimensional spectroscopy with reciprocal space scanning

    Grant number:26249096  2014.04 - 2018.03

    Muto Shunsuke

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    Authorship:Principal investigator 

    Grant amount:\41730000 ( Direct Cost: \32100000 、 Indirect Cost:\9630000 )

    In this study we developed state-of-the-art methods that enable physical properties analysis and thier chemical imaging of functional materials at nanometer scale by combining multiple electron spectroscopic methods associated with scanning transmission electron microscopy. The method involves information/statistical methods to process the obtained big size datasets. The methods applied to analyses of environmental, energy, magnetic and biological materials, thereby clarifying the site occupancies and chemical states of dopant elements in manners that the conventional diffraction and microscopic methods have never accessed.

  19. Exploration of nanostructure - property relationships for materials innovation

    Grant number:25106001  2013.06 - 2018.03

    Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    TANAKA Isao

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

    This group mainly encouraged the collaboration between project members. This group organized international symposiums for publishing our studies, organized many small workshops for accelerating the communication between researchers with different backgrounds, published an international book of our research summary, and encouraged may activities of young researchers. In addition, this group supported the building of a web site and publication of a booklet.

  20. Development of nanometer scale electronic state analysis methods

    Grant number:25106004  2013.06 - 2018.03

    Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    MUTO SHUNSUKE

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    Authorship:Principal investigator 

    Grant amount:\150930000 ( Direct Cost: \116100000 、 Indirect Cost:\34830000 )

    In the present study we aimed to develop novel methods that enable us to analyze and visualize the localized chemical states, thereby applying them to real materials analysis, using transmission electron microscopy and associated spectroscopic methods.
    In particular, we have established the scheme where a large size of datasets are collected as a function of spatial coordinates or diffraction condition by scanning/rocking a fine-focused electron beam on a sample, followed by applying machine learning techniques to the so-called 'big data' obtained to allows us to extract the embedded chemical states.

  21. エネルギーフィルタ環境TEM による触媒表面ガス吸着/反応可視化

    2013.04 - 2015.02

    科学研究費補助金 

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    Authorship:Principal investigator 

    本研究の目的は,名古屋大学の反応科学超高圧走査透過型電子顕微鏡(RS-HVSTEM)を用いて金属触媒表面のガス反応(吸着,解離など)のナノメートルレベルでのその場可視化を試みることである.次項以下に示すように100Pa 程度のガス圧下で軽元素ガス分子の電子エネルギー損失スペクトル(EELS)は5-20eV の領域に特徴的な微細構造を示すことを我々は見いだした.この大きな強度を持つスペクトルを使ったエネルギーフィルター像によってガス分子を可視化する事を着想した.これまで環境TEM における触媒反応のミクロ可視化としてまさしく待ち望まれてき,
    反応活性点の明快な特定とそのダイナミックな可視化という課題に切り込む.

  22. ナノプローブを用いたS/TEM内インターカレーション過程その場観察の試み

    2011.04 - 2013.03

    科学研究費補助金 

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    Authorship:Principal investigator 

    本研究の目的は、TEM用STM測定試料ホルダーを改良し、インターカーレーション反応過程をナノスケールでその場観察・化学状態測定を行うことを試みるものである。その具体的かつ喫緊の要求が高い応用例として次世代リチウムイオン電池正極活物質として期待されているLiFePO4の充放電過程におけるリチウムイオンの移動とそれに伴う構造相転移を透過型電子顕微鏡(TEM)と電子エネルギー損失分光(EELS)によってその場観察し、そのための試料マニピュレ-ションシステムを開発することにある。

  23. 局在水素の電子分光間接イメージング法の開発

    2008.04 - 2010.03

    科学研究費補助金  挑戦的萌芽研究

    武藤俊介

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    Authorship:Principal investigator 

  24. Pixon型信号処理による微量軽元素の電子状態分析法の開発

    2006.04 - 2008.03

    科学研究費補助金  萌芽研究,課題番号:17656204

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    Authorship:Principal investigator 

  25. 高エネルギー電子ビームによるチェレンコフ発光を用いた新しいサブナノ領域分析

    2003.04 - 2005.03

    科学研究費補助金  萌芽研究,課題番号:15656153

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    Authorship:Principal investigator 

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Industrial property rights 1

  1. 発光体およびその製造方法

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    Application no:特願2009-18031  Date applied:2009.1.29

    Country of applicant:1  

 

Teaching Experience (On-campus) 42

  1. Thermodynamics

    2020

  2. Physical Science and Engineering Tutorial 2a

    2020

  3. Advanced lecture of high-energy elecron spectroscopy

    2020

  4. 熱力学

    2019

  5. ナノ顕微分光物質科学特別実験及び演習

    2019

  6. ナノ顕微分光物質科学セミナー

    2019

  7. 物質科学特別輪講(ナノ顕微分光物質科学)A,B

    2019

  8. ナノ顕微分光物質科学特別実験及び演習

    2018

  9. ナノ顕微分光物質科学セミナー

    2018

  10. 高エネルギー電子分光特論

    2018

  11. 物質科学特別輪講(ナノ顕微分光物質科学)A,B

    2018

  12. 熱力学

    2018

  13. 熱力学

    2017

  14. 電磁気学解析

    2017

  15. 極限環境エネルギー材料科学セミナー

    2017

  16. 量子エネルギー工学セミナーAB

    2017

  17. 熱力学

    2016

  18. 高エネルギー電子分光特論

    2016

  19. 極限環境エネルギー材料科学セミナー

    2016

  20. 量子エネルギー工学セミナーAB

    2016

  21. 電磁気学解析

    2016

  22. 熱力学

    2015

  23. 極限環境エネルギー材料科学セミナー

    2015

  24. 量子エネルギー工学セミナーAB

    2015

  25. 電磁気学解析

    2015

  26. 熱力学

    2014

  27. 極限環境エネルギー材料科学セミナー

    2014

  28. 高エネルギー電子分光特論

    2014

  29. 量子エネルギー工学セミナーAB

    2014

  30. 熱力学

    2014

  31. 数学2および演習(G30)

    2014

  32. 極限環境エネルギー材料科学セミナー

    2014

  33. 高エネルギー電子分光特論

    2014

  34. 量子エネルギー工学セミナーAB

    2014

  35. Mathematical Physics I

    2012

  36. 電子分光法

    2012

  37. 熱力学

    2012

  38. 英語

    2012

  39. Foundations of Mechanics I

    2011

  40. エネルギー材料物性

    2004

  41. 量子材料物理

    2001

  42. 統計力学A

    2001

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Teaching Experience (Off-campus) 17

  1. 電子エネルギー損失分光法による化学結合解析

    2010.4 - 2011.3 大阪大学)

  2. 電子エネルギー損失分光法による化学結合解析

    2009.4 - 2010.3 大阪大学)

  3. 電子エネルギー損失分光法による化学結合解析

    2008.4 - 2009.3 大阪大学)

  4. エネルギー科学特別講義IX

    2005.4 - 2006.3 九州大学)

  5. 数学2および演習(G30)

    Nagoya University)

  6. 高エネルギー電子分光特論

    Nagoya University)

  7. 高エネルギー電子分光特論

    Nagoya University)

  8. 電磁気学解析

    Nagoya University)

  9. 量子エネルギー工学セミナーAB

    Nagoya University)

  10. 量子エネルギー工学セミナーAB

    Nagoya University)

  11. 量子エネルギー工学セミナーAB

    Nagoya University)

  12. 熱力学

    Nagoya University)

  13. 熱力学

    Nagoya University)

  14. 熱力学

    Nagoya University)

  15. 極限環境エネルギー材料科学セミナー

    Nagoya University)

  16. 極限環境エネルギー材料科学セミナー

    Nagoya University)

  17. 極限環境エネルギー材料科学セミナー

    Nagoya University)

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Social Contribution 10

  1. 豊西総合大学講座

    Lecturer

    愛知県立豊田西高等学校  2017.11

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    Audience: High school students

    Type:Visiting lecture

  2. 名古屋大学オープンレクチャー2017

    Lecturer

    名古屋大学産官連携推進本部  2017.3

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    Audience: High school students, General

    Type:Seminar, workshop

    「物質からのミクロな暗号を読み解くはなし」

  3. 第3回Spring-8材料構造の解析に役立つ計算科学研究会 第10回Spring-8先端利用技術ワークショップ

    Lecturer

    (公財)高輝度光科学研究センター(JASRI) SPring-8 利用推進協議会 研究開発委員会  2017.2

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    Audience: Researchesrs, Company

    Type:Seminar, workshop

    理論・実験・計算科学と情報科学が融合したマテリアルズ・インフォマティクスの基盤となる方法論の原理とそれらの適用例、および情報統合型物質・材料開発イニシアティブ(MI2I:“Materials research by Information Integration” Initiative)の活動内容を紹介し、データ駆動型(情報統合型)の新しい科学が加速する新物質・新材料研究や、放射光計測における変革を展望する。

  4. 機器分析講座「材料の微細組織の観察」

    Lecturer

    静岡理工科大学  2016.3

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    Audience: College students, Teachers, Researchesrs, Company

  5. 先端計測インフォマティクス大量データ時代の情報活用ワークショップ

    Lecturer

    物質・材料研究機構  2016.1

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    Audience: Researchesrs, Company

    Type:Seminar, workshop

    以下の技術をNIMS内外の実験系・理論系・情報系研究者が共有することで、測定装置には手を加えず、埋蔵データをリソースとして活用できるシステムを構築することを目的とする。
    (1) NIMSが得意とする計測技術を使った、大量データの取得と解析
    (2) 大量データから信頼性の高い定量値を引き出す機械学習と、そのパッケージ化
    (3) 蓄積されてきた実験データを掘り起し、情報科学の俎上に載せるデータベース化技術

  6. 電池・エネルギー材料解析セミナー

    2014.11

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    昨今の革新的なエネルギー技術の開発から導入・普及に向けた不可欠な手段として、効果的・効率的にナノレベルで制御された高度な材料開発が注目を集めておりますが、このような材料開発を加速するためには、透過電子顕微鏡(TEM)、核磁気共鳴装置(NMR)をはじめとする複数の計測・分析機器を総合的、有機的に組み合わせ、解析していく事が必要とされています。
    本セミナーでは、これらの最新の分析技術をご紹介すると共に、次世代の革新電池・エネルギーに関する先端技術・材料開発の一助となるソリューションのご提供をさせていただきます。

  7. セミナー「分光スペクトルの統計処理ーノイズ処理と多変量スペクトル分解法」㈱情報機構

    Lecturer

    2014.5

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    Audience: Researchesrs, Company

  8. セミナー「EELSの基本原理とスペクトル解釈・評価ノウハウ」㈱情報機構

    2013.11

  9. 春日井高等学校出前講義「原子の世界から見るナノテクノロジー」

    Lecturer

    春日井高等学校  2013.11

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    Audience: High school students

    Type:Visiting lecture

  10. 透過電子顕微鏡および電子エネルギー損失分光法による材料解析・評価技術((株)情報機構)

    2011.8

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Media Coverage 1

  1. ガス環境下における自動車触媒ナノ粒子のオペランドTEM観察 ~触媒開発に大きく貢献する研究開発手法~ Internet

    文部科学省ナノテクノロジープラットフォーム  NanotechJapan Bulletin  <2020年秀でた利用成果-1>  2020.4.10

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    Author:Other