Time-Resolved Atomic Imaging of 3D Active-Site by Micro-Photoelectron Holography
The purpose on this research is to perform
photoelectron holography measurements for a variety of materials, in which
impurity sites of dopants, active-sites of catalysis, and local structures of
interfaces fulfil their important functions. Usually, such active-site does not
exist on periodic sites, therefore, conventional diffraction methods do not
work for determining their local atomic structures. The photoelectron
holography technique is one of the best experimental technique to realize for
imaging their three dimensional structures.
In this project, we will realize the followings.
[TARGET 1] Distinguished imaging of active-sites
depending on chemical bonding conditions by using high-energy resolution
apparatus.
We
realize site-specific imaging of dopants or catalysts using sub-eV scale
binding energy difference in photoelectron spectra. Both structural and
electronic states information for “3D active-site” will be obtained.
[TARGET 2] Pinpoint analysis by using micron-size beam.
We
design micron-size synchrotron radiation beam at the soft X-ray beamline at
SPring-8. Combination of the micro-beam with the photoelectron holography
method enable us to image “3D-active-site” in sub-10 mm region for a variety of
samples.
[TARGET 3] Time-resolved dynamical analysis under
applying outer field.
We
realize pump & probe photoelectron holography methods in sub-ns region. The
investigation for realistic device materials in operand with magnetic, electric
pulses is performed.
Members
| Principal Investigator
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Toyohiko KINOSHITA
Chief Scientist, Research & Utilization Division, Japan Synchrotron Radiation Research Institute
Research Field : Synchrotron Radiation Spectroscopy, Microscopy
Comment : I expect to contribute the 3D-active site investigations using synchrotron radiation methods.
URL： http://www.spring8.or.jp/en/ |
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| Co-Investigator
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Hiroshi DAIMON
Professor, Graduate School of Materials Science, Nara Institute of Science and Technology
Research Field : Surface Science, Synchrotron Radiation Photoelectron Spectroscopy
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Fumihiko MATSUI
Associate Professor, Graduate School of Materials Science, Nara Institute of Science and Technology
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Takayuki MURO
Senior Scientist, Japan Synchrotron Radiation Research Institute (JASRI)
Research Field : Photoemission spectroscopy using synchrotron radiation
Comment :I am a staff of SPring-8 working at a photoemission spectroscopy station for public use. If you are interested in photoemission spectroscopy at SPring-8, please feel free to contact me..
URL：
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Masaru SHIMOMURA
Professor, Graduate School of Integrated Science and Technology, Shizuoka University
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| Collaborator |
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Masanari KOUGUCHI
Principal Researcher, Center for Exploratory Research, Hitachi Ltd.
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Munetaka TAGUCHI
Research Assistant Professor, Graduate School of Materials Science, Nara Institute of Science and Technolog |
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Takayoshi YOKOYA
Professor, Graduate School of Natural Science and Technology, Okayama University |
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Takanori WAKITA
Research Assistant Professor, Graduate School of Natural Science and Technology, Okayama University |
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Kensei TERASHIMA
Research Assistant Professor, Graduate School of Natural Science and Technology, Okayama University |
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Hiroyuki MATSUDA
Research Assistant Professor, Graduate School of Materials Science, Nara Institute of Science and Technology |
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Iwao MATSUDA
Associate Professor, Institute for Solid State Physics, University of Tokyo |
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Susumu YAMAMOTO
Research Associate, Institute for Solid State Physics, University of Tokyo |
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