Faculty Profiles - ONOE Jun

Papers - ONOE Jun

Division display 1 - 20 of about 146 ／ All the affair displays >>

High-performance and Anomalous Thermoelectric Properties of Organic−inorganic Nanocomposites Consisting of Fullerene Molecules and Molybdenum Trioxide Nanoclusters Reviewed Open Access

Masato Nakaya, Shun Yamamoto, Takuya Kawai, and Jun Onoe

Carbon Vol. 241 page： 120374/1 - 120374/9 2025.4

Electrical conduction mechanism of gels and films formed by self-assembled elastin-like polypeptide nanofiber: Implications for Tissue Regeneration Invited Reviewed International coauthorship

R. Shibata, Md. Z. Islam, R. Takahashi, M. Nakaya, J. Onoe, and A. Sugawara-Narutaki

ACS Appl. Nano Mater. Vol. 8 page： 5141 - 5148 2025.2

A novel symmetry in nanocarbons: Pre-constant discrete principal curvature structure Reviewed

Y. Kobata, S. Matsutani*, Y. Noda, Y. Ogata, and J. Onoe

Geometry, Integrability, and Quantization Vol. 27 page： 25 - 44 2024.7

Structures, fundamental properties, and potential applications of low-dimensional C60 polymers and other nanocarbons: A review Invited Reviewed International coauthorship

Jun Onoe, Yusuke Nodab, Qian Wang, Koji Harano, Masato Nakaya, and Tomonobu Nakayama

Science and Technology of Advanced Materials Vol. 25 ( 1 ) page： 2346068/1 - 2346068/29 2024.5

Micro/macroscopic and density functional studies of the interactions between Molybdenum Trioxide and C60molecule Reviewed

M. Nakaya, T. Kawai, S. Watanabe, J. Onoe

J. Chem. Phys. Vol. 158 page： 054701/1 - 054701/7 2023.2

Kinetic study of photopolymerization and depolymerization in C60 films using in situ Fourier-transform infrared spectroscopy for development of C60-based thermoelectric materials Invited Reviewed

Tatsuma Izumi, Masato Nakaya, Jun Onoe

Chemical Physics Letters Vol. 801 page： 139744/1 - 139744/6 2022.6

Unraveling the reasons behind lead phthalocyanine acting as a good absorber for near‑infrared sensitive devices Reviewed

Masahiro Kato, Hayato Yoshizawa, Masato Nakaya, Yasutaka Kitagawa, Koichi Okamoto, Tomoaki Yamada, Masahito Yoshino, Kentaro Tanaka, Jun Onoe

Scientific Reports Vol. 12 page： 8810/1 - 8810/12 2022.5

The uptake characteristics of Prussian-blue nanoparticles for rare metal ions for recycling of precious metals from nuclear and electronic wastes Reviewed

Shinta Watanabe, Yusuke Inaba, Miki Harigai, Kenji Takeshita, and Jun Onoe

Scientific Reports Vol. 12 page： 5135/1 - 5135/10 2022.3

Thermally Stable Array of Discrete C60s on a Two-Dimensional Crystalline Adlayer of Macrocycles both in Vacuo and under Ambient Pressure Reviewed

Shin-ichiro Kawano, Masato Nakaya, Masaaki Saitow, Atsuki Ishiguro, Takeshi Yanai, Jun Onoe, and Kentaro Tanaka

J. Am. Chem. Soc. Vol. 144 ( 15 ) page： 6749 - 6758 2022.3

Photopolymerization effects on the external quantum efficiency of fullerene/zinc phthalocyanine heterojunction solar cells Reviewed

Masahiro Kato, Masato Nakaya, Shinta Watanabe, Koichi Okamoto, and Jun Onoe

AIP Advances Vol. 11 page： 075227/1 - 075227/6 2021.7

Resolving Site-Specific Energy Levels of Small-Molecule Donor-Acceptor Heterostructures Close to Metal Contacts Reviewed International coauthorship

Amani Benhnia, Shinta Watanabe, Rouzhaji Tuerhong, Masato Nakaya, Jun Onoe and Jean-Pierre Bucher

Nanomaterials Vol. 11 page： 1618/1 - 1618/10 2021.6

The uptake mechanism of palladium ions into Prussian-blue nanoparticles in a nitric acid solution toward application for the recycling of precious metals from electronic and nuclear wastes Reviewed

Jun Onoe, Shinta Watanabe, Hideki Masuda, Yusuke Inaba, Miki Harigai, and Kenji Takeshitac

RSC Advances Vol. 11 page： 20701 - 20707 2021.6

Theoretical prediction on the immiscible Pb-Sn alloy stabilized on metal surfaces Reviewed

Shota Ono, Junji Yuhara, Jun Onoe

Chemical Physics Letters Vol. 776 page： 138696/1 - 138696/5 2021.4

Morphological and optical properties of alpha- and beta-phase zinc (II) phthalocyanine thin films for application to organic photovoltaic cells Reviewed

Masahiro Kato, Masato Nakaya, Yuki Matoba, Shinta Watanabe, Koichi Okamoto, Jean-Pierre Bucher, and Jun Onoe

The Journal of Chemical Physics Vol. 153 page： 144704 2020.10

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

We have investigated the morphological and optical properties of α- and β-phase Zinc Phthalocyanine (ZnPc) thin films for application to organic photovoltaic cells (OPVs). It was found that the α-phase is completely converted to the β-phase by thermal annealing at 220 °C under ultrahigh vacuum conditions. When the α- to β-phase transition takes place, the surface roughness of the ZnPc film became flat uniformly with a nanometer order of unevenness by anisotropic growth of crystalline grains along a lateral direction to substrates. Correspondingly, the optical absorbance of the β-phase film became greater by 1.5–2 times than that of the α-phase one in an ultraviolet–visible–near infrared (UV–vis–NIR) wavelength range, which plays a role in increasing the number of photogenerated excitons. On the contrary, time-resolved photoluminescence measurements showed that the average lifetime of excitons for the β-phase film became shorter by 1/6–1/7 than that for the α-phase one, which plays a role in decreasing the number of excitons achieving the donor/acceptor interface where excitons are separated to carriers (holes and electrons). Both the increase in the number and the shortening in the average lifetime have a trade-off relationship with each other for contribution to the photoelectric conversion efficiency of OPVs. Then, we examined an external quantum efficiency (EQE) of OPVs using the α- and β-phase films as a donor and obtained that the former OPV (α-phase) exhibits a higher EQE by ∼2 times than the latter one (β-phase) in the wavelength range of 400 nm–800 nm.

DOI： 10.1063/5.0022262

Immobilization of CO2 at room temperature using the specific sub-nm space of one-dimensional uneven-structured C60 polymer film Reviewed

Masato Nakaya, Yasutaka Kitagawa, Shinta Watanabe, Rena Teramoto, Iori Era, Masayoshi Nakano, and Jun Onoe

Advanced Sustainable Systems Vol. 5 page： 2000156 - 2000156 2020.10

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

Immobilization and reuse of CO2 are urgent tasks for sustaining our global environment. Here we demonstrate that CO2 can be immobilized by reaction with H2O at room temperature (RT) in the specific sub-nm space of one-dimensional uneven-structured C60 polymer (1D polymer) film, even though the reaction does not occur at RT in the gas phase (activation energy: ca. 2 eV). First-principles calculations revealed that the CO2 molecule is stacked as a bridge between the concave portions of adjacent 1D polymer frameworks via locally induced Coulomb interactions. Such induced charge polarization activates CO2 both by weakening its double-bond nature and by lowering its lowest unoccupied molecular orbital (LUMO) energy due to the bending motion. In addition, the flexible pai-orbitals of the 1D polymer provide the optimal Coulomb field to stabilize the transition state (TS) of the CO2 + H2O reaction remarkably. These factors work together to make the reaction possible at RT via no or negligible TSs.

DOI： 10.1002/adsu.202000156

Electron-beam-irradiation of photopolymerised C60 film studied using in situ scanning tunneling microscope, in situ Fourier-transform infrared spectroscopy, and first-principles calculations Reviewed

Jun Onoe, Masato Nakaya, Shinta Watanabe, Tomonobu Nakayama, Kaoru Ohno, and Yusuke Noda

AIP Advances Vol. 10 ( 8 ) page： 085212 2020.8

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

We have examined the formation of a two-dimensional (2D) new carbon network by inducing the general Stone–Wales transformation between adjacent C60 molecules in a 2D dumbbell-type C60 polymer film. Structural changes in pristine C60 films after ultraviolet-visible (UV-vis) light and electron-beam (EB) irradiations were studied using in situ scanning tunneling microscope (STM) and in situ Fourier- transformed infrared (IR) spectroscopy, in combination with first-principles calculations based on density functional theory. Analyses of STM images and depth profiles found that three types of photopolymerized dumbbell-shaped dimers and trimers are formed on the surface layers of pristine C60 films: (i) [2+2] C60 dimers formed in a lateral direction, (ii) [2+2] dimerization of C60 between the first and second layers, and (iii) a triangular [2+2] C60 trimer along a lateral direction. As UV-vis light irradiation time increases, a comparison between experimental and theoretical IR spectra indicated that 2D dumbbell-shaped C60 polymers are formed within a few surface layers of the C60 film (in a similar manner, a 1D dumbbell-shaped polymer is also formed in a shallow space of the C60 film), whereas a [2+2] dumbbell-shaped dimer is formed in any bulk space of the film. Thereafter, when the EB was irradiated to the photopolymerized C60 film, the evolution of IR spectra with respect to EB irradiation time suggested that the 2D dumbbell-type C60 polymer is not decomposed but structurally changed to form a new network polymer.

DOI： 10.1063/5.0018985

Chemical forms of rhodium ion in pure water and nitric acid solution studied using ultraviolet-visible spectroscopy and first-principles calculations Reviewed

Shinta Watanabe, Toshikazu Sato, Miki Harigai, Yusuke Inaba, Kenji Takeshita, Jun Onoe

IOP Conf. Series: Materials Science and Engineering Vol. 835 page： 012001 2020.5

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

We have investigated chemical forms of rhodium (Rh) ion in nitric acid solution by using spectroscopic and first-principles methods, in order to develop the disposal of high-level radioactive nuclear liquid wastes (HLLW). The electronic structure of Rh complexes in both pure water and nitric acid solutions was investigated using ultraviolet-visible (UV-vis) absorption spectroscopy. Comparison with many-electron calculations indicates that Rh ion forms an octahedral bidentate complex coordinated with three nitrate ions, [Rh(NO3)3], in both pure water and nitric acid solutions. This is consistent with thermodynamic prediction. Since the overall feature of UV-vis spectra of the Rh complex remained unchanged in a range of 0–3 M nitric acid solutions, the structure of the Rh complex was found to be stable in the range. In addition, since no significant changes in UV-vis spectra of Rh complex were observed under γ- ray radiation, the Rh complex, [Rh(NO3)3], can be expected to be stable in actual HLLW.

DOI： 10.1088/1757-899X/835/1/012001

Sorption Properties of Aluminum Hexacyanoferrate for Platinum Group Elements Reviewed

Ria Mishima, Yusuke Inaba, Sotaro Tachioka, Miki Harigai, Shinta Watanabe, Jun Onoe, Masahiko Nakase, Tatsuro Matsumura, and Kenji Takeshita

Chemistry Letters Vol. 49 page： 83-86 2020.1

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

A sorbent, Aluminum hexacyanoferrate (AlHCF), has been
developed for separating platinum group elements (PGMs) such
as Pd, Ru, and Rh in high-level liquid waste generated from
spent nuclear fuel reprocessing. The general sorption behavior of
PGMs to AlHCF was measured. Without metal ions, substantial
elution of AlHCF by nitric acid was observed. The single PGM
sorption test revealed that Pd had fast kinetics and sorbed well to
AlHCF, but the slow kinetics of Rh resulted in total dissolution
of the sorbent. However, the reconstruction of the sorbent structure
including Al and Fe, was observed. A competitive sorption
experiment revealed that the coexistence of Pd stabilized the
structure against nitric acid, and the percent sorption of Rh
increased with the Pd concentration. Understanding the sorption
and dissolution behavior of AlHCF will help improve its
performance as a PGM sorbent.

DOI： 10.1246/cl.190741

Low thermal conductivity of peanut-shaped carbon nanotube and its insensitive response to uniaxial strain Reviewed

J. Sun, K. Yuan, W. Zhou, X. Zhang, J. Onoe, Y. Kawazoe, and Q. Wang

Nanotechnology Vol. 31 ( 11 ) page： 115701 2020

Control of electric, optical, thermal properties of C60 films by electronbeam irradiation Reviewed

Masato Nakaya, Shinta Watanabe, Jun Onoe

Carbon Vol. 152 page： 882-887 2019.7

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

We have examined the electric, optical, and thermal properties of C60 films before and after electronbeam (EB: an incident energy of 3 keV) irradiation by inducing a variety of cross-linked structures between
adjacent C60 molecules via the general Stone-Wales transformation, and demonstrated that those properties can be controlled by EB irradiation time: the resistivity r is continuously changed by 106
times and optical absorbance of C60 film increases in a range of 350 850 nm when compared to that of pristine C60 film, and the heat-resistance becomes higher that is comparable to that of polyimide film
commercially available as the highest heat-resistance organic material.

DOI： 10.1016/j.carbon.2019.06.089

　 PREV - NEXT 　

<ONOE Jun>

Papers - ONOE Jun