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Nakamura, Takafumi*; Yamamoto, Yukio*; Arakawa, Masakazu*; Maruyama, Akio*; Yoshigoe, Akitaka
Sangyo Oyo Kogakukai Rombunshi, 11(2), p.109 - 114, 2023/09
Surface chemistry experimental end-station at BL23SU in SPring-8 is widely used to study various surfaces and interfaces of functional materials by means of soft X-rays synchrotron radiation. To analyze surface chemical reactions between gas and solid surfaces, an accurate control of flow-rates of gases is essential. This paper describes a computerized automatic gas flow control system to improve the accuracy and reproducibility of gas-surface reaction experiments in the pressure range of ultra-high vacuum (molecular flow) conditions. The system uses feedback control to operate the slow-leak valve to control the gas-pressure. As a result, the system achieved results equivalent to those of a skilled experimenter.
O formation on Cu
Pd(111) and CuPt(111)Tsuda, Yasutaka; Gueriba, J. S.*; Makino, Takamasa*; Di
o, W. A.*; Yoshigoe, Akitaka; Okada, Michio*
Scientific Reports (Internet), 11, p.3906_1 - 3906_8, 2021/02
Times Cited Count：3 Percentile：15.24(Multidisciplinary Sciences)
1 surface in atmosphereYoshigoe, Akitaka
Japanese Journal of Applied Physics, 59(SM), p.SMMB05_1 - SMMB05_5, 2020/07
Times Cited Count：0 Percentile：0(Physics, Applied)This study presents the results on synchrotron radiation photoelectron spectroscopy (SR-XPS) analysis of oxides formed in the air on a well-defined clean Ge(100)21 surface prepared in UHV condition. Owing to high energy-resolution SR-XPS, detailed chemical information on Ge oxidation states at the Ge surface was clarified. The result showed that the water vapor in the atmosphere plays an important role to progress slow oxidation of the Ge surface. We believe that the data obtained in this study is valuable for the basic understanding of the formation mechanisms of native oxides at the Ge surfaces.
Yoshigoe, Akitaka
X-sen Kodenshi Bunkoho, p.271 - 282, 2018/12
Based on the series of author's studies, the author explains the time-resolved synchrotron radiation X-ray photoelectron spectroscopy and supersonic oxygen molecular beam study on the adsorption reaction dynamics of oxygen molecules at the Si single crystal surface in the section 5.10 of the new textbook "X-ray Photoelectron Spectroscopy" (Kodan-sha) edited by Yuji Takakuwa.
Nakamura, Akio
Nihon Genshiryoku Gakkai-Shi, 45(11), p.736 - 737, 2003/11
no abstracts in English
at room temperature studied by Si-2p core-level spectroscopy using synchrotron radiationYoshigoe, Akitaka; Teraoka, Yuden
Surface Science, 482-485(Part.1), p.189 - 195, 2001/06
no abstracts in English
Teraoka, Yuden; Yoshigoe, Akitaka
JAERI-Tech 2001-006, 91 Pages, 2001/03
JAERI-Tech-2001-006.pdf:3.51MB
no abstracts in English
)F) physisorbed on Cu(111) following Si K-Shell excitationSekiguchi, Tetsuhiro; Baba, Yuji
Surface Science, 433-435, p.849 - 853, 1999/00
Times Cited Count：14 Percentile：61.12(Chemistry, Physical)no abstracts in English
*; Aoki, Yasushi; Nagai, Shiro
Nuclear Instruments and Methods in Physics Research B, 108, p.75 - 80, 1996/00
Times Cited Count：2 Percentile：31.89(Instruments & Instrumentation)no abstracts in English
*; *; Shimizu, Yuichi; Sugimoto, Shunichi*; Nishii, Masanobu; Kawanishi, Shunichi
Chemistry Letters, 1993, p.1637 - 1638, 1993/00
no abstracts in English
Yamamoto, Hiroyuki; Baba, Yuji; Sasaki, Teikichi
Nuclear Instruments and Methods in Physics Research B, 73, p.587 - 589, 1993/00
no abstracts in English
Yamamoto, Hiroyuki; Baba, Yuji; Sasaki, Teikichi
Hyomen Kagaku, 13(5), p.310 - 313, 1992/07
no abstracts in English
Kawanishi, Shunichi; Sugimoto, Shunichi; Shimizu, Yuichi; Suzuki, Nobutake
J. Photopolym. Sci. Technol., 5(2), p.271 - 278, 1992/00
no abstracts in English
, N, CO
, and CO ion bombardmentNagai, Shiro
Nuclear Instruments and Methods in Physics Research B, 59-60, p.936 - 939, 1991/00
Times Cited Count：3 Percentile：50.31(Instruments & Instrumentation)no abstracts in English
Yamamoto, Hiroyuki
Kagaku To Kogyo, 43(3), p.377 - 378, 1990/03
no abstracts in English
Hirabayashi, Takakuni; K.W.Sung*; Sasaki, Teikichi; Saeki, Masakatsu
Journal of Nuclear Materials, 175, p.78 - 83, 1990/00
Times Cited Count：9 Percentile：67.09(Materials Science, Multidisciplinary)no abstracts in English
Teraoka, Yuden
no journal, ,
no abstracts in English
Yoshigoe, Akitaka; Shiwaku, Hideaki; Kobayashi, Toru; Shimoyama, Iwao; Matsumura, Daiju; Tsuji, Takuya; Nishihata, Yasuo; Yaita, Tsuyoshi; Kogure, Toshihiro*; Motai, Satoko*; et al.
no journal, ,
Fundamental researches on adsorption state of radiaoactive Cs in clay mineral (aluminosilicate) have become important from the virewpoints of development of decontamination or volume-reduction techniques since the accident of Fukushima Daiiichi Nuclear Power Station. Pinpoint surface chemical analysis with nanometer spatial resolutions focusing on a target sample has been needed. In this presentation, I will show our recent work on nanoscale pinpoint surface chemical analysis for Cs-containing clay mineral by means of synchrotron radiation PEEM at BL17SU in SPring-8.
2 single domain surface studied by low energy electron diffraction and electron spectroscopyKakiuchi, Takuhiro*; Katsuragi, Takuma*; Nakano, Yuji*; Yoshigoe, Akitaka; Nagaoka, Shinichi*; Mase, Kazuhiko*
no journal, ,
HfO has been becoming important as a future dielectric material for future metal-oxide-semiconductor devices. In this study, surface structure, surface chemical state, and valence electronic structure after oxidation of single domain Si(110)-162 surface have precisely measured by using low-energy-electron diffraction and synchrotron radiation photroemission spectroscopy. It was found that five possible adsorption sites (SC1-SC5) of the single domain Si(110)-162 surface are uniformely reacted with Hf atoms with increasing its exposure, indicating that random Hf adsorption takes place on the surface.
Yoshigoe, Akitaka
no journal, ,
The lecture concerning the utilization of surface chemistry end-station at BL23SU in SPring-8 will be held as part of the Nanotechnology Platform Japan program of MEXT for the year 2016.
