研究者業績

Shin-ichi Honda

  (本多 信一)

Profile Information

Affiliation
Professor, Graduate School of Engineering, University of Hyogo
Degree
Engineering(Osaka University)

J-GLOBAL ID
201801013684947136
researchmap Member ID
B000347979

External link

Papers

 120
  • Shunjiro Fujii, Shin-ichi Honda, Yoshihiro Oka, Yuki Kuwahara, Takeshi Saito
    Materials, 16(2), Jan, 2023  Peer-reviewed
    Single-wall carbon nanotubes (SWCNTs) are promising materials for electronic applications, such as transparent electrodes and thin-film transistors. However, the dispersion of isolated SWCNTs into solvents remains an important issue for their practical applications. SWCNTs are commonly dispersed in solvents via ultrasonication. However, ultrasonication damages SWCNTs, forming defects and cutting them into short pieces, which significantly degrade their electrical and mechanical properties. Herein, we demonstrate a novel approach toward the large-scale dispersion of long and isolated SWCNTs by using hydrodynamic cavitation. Considering the results of atomic force microscopy and dynamic light-scattering measurements, the average length of the SWCNTs dispersed via the hydrodynamic cavitation method is larger than that of the SWCNTs dispersed by using an ultrasonic homogenizer.
  • MORISHITA Hiroki, FUJII Shunjiro, HONDA Shin-ichi, KUBO Toshitaka, SHIMIZU Tetsuo
    Vacuum and Surface Science, 65(9) 388-393, Sep 10, 2022  Peer-reviewed
    Copper oxide nanowires with good crystallinity and high aspect ratio have been attractive for use in high-performance optical and electronic devices. In this work, we fabricated copper oxide nanowires by thermal oxidation method. Copper oxide nanowires were fabricated at various heating times, keeping at a heating temperature of 500℃. When the heating time was over 30 minutes, the average width of the nanowires reached about 100 nm. It was observed that the bottom part of the nanowire was thick compared to the top part. We investigated the detailed structure by using micro-raman spectroscopy and electron backscatter diffraction (EBSD). From the results of raman spectra and EBSD crystal orientation mappings, it was found that Cu2O/CuO heterostructure is formed at the thick region of the nanowire. Two type of heterostructures were confirmed, namely Cu2O(110)/CuO(001) and Cu2O(110)/CuO(110).
  • Wei Li, Jeng-Yu Ke, Yun-Xuan Ou-Yang, Ying-Xuan Lin, Ching-Hwa Ho, Kuei-Yi Lee, Shunjiro Fujii, Shin-ichi Honda, Hideaki Okado, Masamichi Naitoh
    Japanese Journal of Applied Physics, 61(8) 086504-086504, Jul 27, 2022  Peer-reviewed
    Abstract The chemical vapor transport method was used in this research to synthesize MoS2 bulk. Through mechanical exfoliation, we limited the thickness of MoS2 flakes from 1 to 3 μm. In order to fabricate a p–n homogeneous junction, we used oxygen plasma treatment to transform the MoS2 characteristics from n-type to p-type to fabricate a p–n homogenous junction and demonstrate the charge neutrality point shift from −80 to +102 V successfully using FET measurement. The MoS2 p–n homogeneous junction diode showed an excellent p-n characteristic curve during the measurements and performed great rectifying behavior with 1–10 Vpp in the half-wave rectification experiment. This work demonstrated that MoS2 flake had great potential for p-n diodes that feature significant p–n characteristics and rectifying behavior.
  • Syusaku Nakamura, Wataru Nakamura, Shunjiro Fujii, Shin-ichi Honda, Masahito Niibe, Mititaka Terasawa, Yuji Higo, Keisuke Niwase
    Diamond and Related Materials, 123 108828, Mar, 2022  Peer-reviewed
    To clarify the nature of defects presented in neutron (n)-irradiated highly oriented pyrolytic graphite (HOPG), in situ X-ray diffraction (XRD) observation at room temperature (RT) and high pressure was conducted with synchrotron radiation (SPring-8). We focused on the graphite (002) [G(002)] peak under compression to 18.1 GPa and also under decompression. For comparison, unirradiated HOPG was also placed in the same high-pressure cell. We found that the G(002) peak can be represented by two components, the S and L peaks, for the n-irradiated HOPG, whereas it can be represented by only one component for the unirradiated HOPG. The d-spacing for the n-irradiated and unirradiated HOPG samples gradually decreased with increasing pressure. At 18.1 GPa, the d-spacing of the S peak of the irradiated sample became almost the same as that of the unirradiated one, but that of the L peak was larger. Under decompression, the behavior of the d-spacing was almost opposite to that under compression, and the d-spacing was restored to its value before compression. Also, taking account of the changes in the peak widths, we referred to and considered irradiation-induced defects of interstitial-type defects existing between the basal planes and in-plane defects of dislocation dipoles as possible defects that affect the changes in the G(002) peak.
  • Shin-ichi Honda, Yuji Higo, Keisuke Niwase, Masahito Niibe, Mititaka Terasawa, Eiji Taguchi, Syusaku Nakamura
    Japanese Journal of Applied Physics, 60(9) 095002, Sep, 2021  Peer-reviewed
    In situ X-ray diffraction observation was done for neutron-irradiated and un-irradiated highly oriented pyrolytic graphite (HOPG) samples with synchrotron radiation to clarify the effect of irradiation-induced defects on the transformation to diamond under high-pressure and high-temperature treatment. At 16 GPa, no remarkable change appeared for the irradiated HOPG with increasing the temperature up to 800 °C. At temperatures of 1200 °C and 1400 °C, hexagonal diamond was formed, along with the formation of cubic diamond. This is probably due to annealing of the irradiation defects that led to partial restoration of the structure to the original HOPG and then enables the formation. On the other hand, in un-irradiated HOPG, hexagonal diamond was formed at 400 °C, which changed to cubic diamond at 1200 °C or higher. We guess that irradiation defects promote the nucleation of cubic diamond in the irradiated sample and then contribute to the formation of isotropic polycrystalline diamond or amorphous diamond.

Misc.

 32

Books and Other Publications

 4

Presentations

 11

Research Projects

 13

Industrial Property Rights

 17