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Kobayashi, Hikaru*; Suto, Masahito*; Otsuki, Kentaro*; Yoshimura, Kazuya; Yoshida, Hiroko*
Japan Architectural Review (Internet), 6(1), p.e12353_1 - e12353_12, 2023/00
Yoshimura, Kimio; Hakoda, Teruyuki; Yamamoto, Shunya; Yoshikawa, Masahito
Journal of Physics and Chemistry of Solids, 73(5), p.696 - 698, 2012/05
Times Cited Count:4 Percentile:19.57(Chemistry, Multidisciplinary)Tungsten trioxide powder with loading 0.1wt% platinum (Pt/WO) was prepared for opticaldetection of organic hydrides such as cyclohexane, decalin by impregnation with PtCl and subsequent calcination in N gas at 500C. The SEM observation of Pt/WO shows that the Pt particles with mean diameters of 80-100 nm were on the surface of the WO powder. The Pt/WO showed coloration for 13% cyclohexane at higher 100C and for 1.3% cyclohexane at 200C. The in-situ XRD results of the Pt/WO in coloring/bleaching change indicate that the coloring of Pt/WO was caused by transformation of WO to tungsten bronze. The analysis of reacted gas demonstrates that Pt on WO produces only hydrogen and benzene through dehydrogenation of cyclohexane over 100C. It was founded that the Pt/WO has potential of optical detection of organic hydrides by heating at higher 100C.
Yoshimura, Kimio; Hakoda, Teruyuki; Sugimoto, Masaki; Yamamoto, Shunya; Yoshikawa, Masahito
Radiation Physics and Chemistry, 80(4), p.587 - 590, 2011/04
Times Cited Count:2 Percentile:18.18(Chemistry, Physical)no abstracts in English
Yoshimura, Kimio; Hakoda, Teruyuki; Yamamoto, Shunya; Yoshikawa, Masahito
Applied Surface Science, 257(9), p.4428 - 4431, 2011/02
Times Cited Count:5 Percentile:25.21(Chemistry, Physical)no abstracts in English
Hayakawa, Ryoma*; Nakae, Mari*; Yoshimura, Takeshi*; Ashida, Atsushi*; Fujimura, Norifumi*; Uehara, Tsuyoshi*; Tagawa, Masahito*; Teraoka, Yuden
Journal of Applied Physics, 100(7), p.073710_1 - 073710_8, 2006/10
Times Cited Count:13 Percentile:44.78(Physics, Applied)A structural analysis and dielectric property measurements of silicon nitride films fabricated using atmospheric pressure (AP) plasma were carried out, and the results were compared to a radio frequency (RF) plasma case. Using AP plasma, 1.8-nm-thick films composed of SiNO were obtained in the temperature range from 298 to 773 K. X-ray photoelectron spectroscopy and Rutherford backscattering spectrometry revealed 10% more nitrogen atoms corresponding to the NSi bond in the film using AP plasma than those using RF plasma. In the temperature range, the leakage current densities were not affected by the temperature. Films fabricated at 298 K showed leakage current density of as low as 710A/cm at 5MV/cm. This value was one order of magnitude lower than that using RF plasma.
Zegers, R. G. T.*; Sumihama, Mizuki*; Ahn, D. S.*; Ahn, J. K.*; Akimune, Hidetoshi*; Asano, Yoshihiro; Chang, W. C.*; Dat, S.*; Ejiri, Hiroyasu*; Fujimura, Hisako*; et al.
Physical Review Letters, 91(9), p.092001_1 - 092001_4, 2003/08
Times Cited Count:128 Percentile:94.86(Physics, Multidisciplinary)no abstracts in English
Nakano, Takashi*; Ahn, D. S.*; Ahn, J. K.*; Akimune, Hidetoshi*; Asano, Yoshihiro; Chang, W. C.*; Date, S.*; Ejiri, Hiroyasu*; Fujimura, Hisako*; Fujiwara, Mamoru; et al.
Physical Review Letters, 91(1), p.012002_1 - 012002_4, 2003/07
Times Cited Count:1007 Percentile:99.86(Physics, Multidisciplinary)no abstracts in English
Ishikawa, Takatsugu*; Akimune, Hidetoshi*; Daito, Izuru*; Fujimura, Hisako*; Fujita, Yoshitaka*; Fujiwara, Mamoru; Hatanaka, Kichiji*; Hosono, K.*; Ihara, F.*; Ito, M.*; et al.
Nuclear Physics A, 187(1-2), p.58c - 63c, 2001/04
no abstracts in English
Kawaguchi, Kazuhiro; Yoshimura, Kimio; Yamamoto, Shunya; Yoshikawa, Masahito; Takahiro, Katsumi*
no journal, ,
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Yamamoto, Shunya; Hakoda, Teruyuki; Kawaguchi, Kazuhiro; Yoshimura, Kimio; Yamaki, Tetsuya; Kobayashi, Tomohiro*; Yoshikawa, Masahito
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Kawaguchi, Kazuhiro; Takahiro, Katsumi*; Yoshimura, Kimio; Yamamoto, Shunya; Yoshikawa, Masahito
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Sugimoto, Masaki; Yoshimura, Kimio; Idesaki, Akira; Yoshikawa, Masahito; Asano, Atsushi*; Seki, Shu*
no journal, ,
no abstracts in English
Yoshimura, Kimio; Sugimoto, Masaki; Idesaki, Akira; Yoshikawa, Masahito; Tsukuda, Satoshi*; Seki, Shu*
no journal, ,
no abstracts in English
Yoshimura, Kimio; Hakoda, Teruyuki; Sugimoto, Masaki; Yamamoto, Shunya; Yoshikawa, Masahito
no journal, ,
no abstracts in English
Kawaguchi, Kazuhiro; Takahiro, Katsumi*; Yamamoto, Shunya; Hakoda, Teruyuki; Yoshimura, Kimio; Yoshikawa, Masahito
no journal, ,
no abstracts in English
Yoshimura, Kimio; Hakoda, Teruyuki; Yamamoto, Shunya; Yoshikawa, Masahito
no journal, ,
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Sugimoto, Masaki; Yoshimura, Kimio; Idesaki, Akira; Yoshikawa, Masahito; Asano, Atsushi*; Seki, Shu*; Tsukuda, Satoshi*; Tanaka, Shunichiro*
no journal, ,
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Yoshimura, Kimio; Sugimoto, Masaki; Yoshikawa, Masahito
no journal, ,
Polycarbosilane (PCS) polymer with the chelated nickel or palladium was synthesized by the radiation-graft polymerization method. It was found that radicals induced in PCS polymers by electron beam irradiation behave as the sites of graft reaction between PCS polymer and glycidyl methacrylate (GMA) and the degree of graft polymerization was observed to be in proportion to the absorbed dose. After the chelate group was produced in the polymer chain derived from GMA by the reaction with diethylenetriamine, nickel or palladium was introduced into the chelate groups by soaking the solutions of corresponding metal salts. The obtained PCS polymer with the chelated nickel or palladium was fired at 973 K or 1373 K to produce silicon carbide (SiC) ceramics containing nickel or palladium and physical characteristics were measured by XRD, SEM and EDS analysis. As the results, it was found that nickel or palladium is isolated as fine metal grains on the SiC ceramics, i. e., the nickel grains are dispersed with carbon and palladium grains are cohesive on the surface of SiC ceramics.
Yoshimura, Kimio; Sugimoto, Masaki; Yoshikawa, Masahito
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no abstracts in English
Sugimoto, Masaki; Yoshimura, Kimio; Idesaki, Akira; Yoshikawa, Masahito; Seki, Shu*
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no abstracts in English