MultiAtom X-ray Resonance Raman

• Project/Area Number: 26620110
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Analytical chemistry
• Research Institution: Hokkaido University
• Principal Investigator: Asakura Kiytoaka 北海道大学, 触媒科学研究所, 教授 (60175164)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: MARX-R / XAFS / Raman / Low Z / in situ / X-ray Raman / XFEL / 時間分解 / MARXR

Outline of Final Research Achievements

The purpose of this work is to obtain Raman signal of low Z element using the resonance of metal absorption to which the low Z element is coordinated. We have tuned Ta L3 edge absorption peak of TaN compound. We found strong Raman signal. On the other hand, we have little raman signal of N when the excited X-ray is tuned to the energy less than absorption edge corresponding to non-resonant conditions. Thus we concluded Ta absorbed energy was transferred to N and N K-edge electron excited accompanied by the radiation similar to Radiative Auger process amd Multi Atom Resonant Photo Emission(MARPE). This finding is the first and never reported before. The work has clearly demonstrated to open a new in situ spectroscopy for Low Z element and also bond-specific spectroscopy. The new technique is coined to MARXR (Multiatom resonant X-ray Raman)

Research Products

• [Journal Article] Dynamics of Photoelectrons and Structural changes of Tungsten Trioxide Observed by Femtosecond Transient XAFS (2016)
  • Author(s): Y. Uemura, D. Kido, Y. Wakisaka, H. Uehara, T. ohba, Y. Niwa, S. Nozawa, T. Sato, K. Ichiyanagi, R. Fulaya, T. Katayama, T. Togashi, S. Owada, M. Yabashi, K. Hatada, S. Takakusagi, T. Yokoyama, B. Ohtani, K. Asakura
  • Journal Title: Angewandte Chemie International Edition Volume: 55 Issue: 4 Pages: 1364-1367
  • DOI: 10.1002/anie.201509252
  • NAID: 120005946855
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] In Situ back-side illumination fluorescence XAFS (BI-FXAFS) studies on platinum nanoparticles deposited on a HOPG surface as a model fuel cell: A new approach to the Pt-HOPG electrode/electrolyte interface (2014)
  • Author(s): Hiromitsu Uehara, Yohei Uemura, Takafumi Ogawa, Kentaro Kono, Ryoichi Ueno, Yasuhiro Niwa, Hiroaki Nitani, Hitoshi Abe, Satoru Takakusagi, Masaharu Nomura, Yasuhiro Iwasawa, Kiyotaka Asakura
  • Journal Title: Physical Chemistry Chemical Physics Volume: 印刷中 Issue: 27 Pages: 1374813754-1374813754
  • DOI: 10.1039/c4cp00265b
  • Peer Reviewed
• [Presentation] Ultrafast XAFS Studies of WO3 during the Photoexcited Process (2016)
  • Author(s): D.Kido, Y.Uemura, H.Ariga, S.Takakusagi, and K.Asakura
  • Organizer: International Catalysis Congress 16
  • Place of Presentation: Beijing，中国
  • Year and Date: 2016-07-03
  • Int'l Joint Research
• [Presentation] An Interpretation of ps Transient XANES of WO3 in Photoabsorption and Decay Processes. (2015)
  • Author(s): Kiyotaka Asakura
  • Organizer: MSNano Workshop
  • Place of Presentation: Chiba University, 千葉県千葉市
  • Year and Date: 2015-07-27
  • Int'l Joint Research / Invited
• [Presentation] ピコ秒及びフェムト秒XAFSによる酸化タングステンの光励起状態のダイナミクス観測. (2015)
  • Author(s): 上村 洋平・城戸 大貴・脇坂 祐輝・上原 広充・大場 惟史・丹羽 尉博・野澤 俊介・佐藤 篤志・一柳 光平・深谷 亮・足立 伸一・片山 哲夫・矢橋 牧名・高草木 達・大谷 文章・横山 利彦・朝倉 清高
  • Organizer: 日本化学会第95春季年会
  • Place of Presentation: 日大理工学部船橋キャンパス(千葉県船橋市)
  • Year and Date: 2015-03-26 – 2015-03-29
• [Remarks] 表面構造化学部門ホームページ
  • URL: http://www.hucc.hokudai.ac.jp/~q16691/index.html