2001 Fiscal Year Final Research Report Summary
Reaction control with surface nano-structured materials
| Project/Area Number |
11304041
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | The Graduate University for Advanced Studies |
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Principal Investigator |
MATSUMOTO Yoshiyasu The Graduate University for Advanced Studies, School of Advanced Science, Department of Photoscience, Professor, 先導科学研究科, 教授 (70181790)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Kazuya The Graduate University for Advanced Studies, School of Advanced Science, Department of Photoscience, Research Associate, 先導科学研究科, 助手 (30300718)
TAKAGI Noriaki The Graduate University for Advanced Studies, School of Advanced Science, Department of Photoscience, Associate Professor, 先導科学研究科, 助教授 (50252416)
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| Project Period (FY) |
1999 – 2001
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| Keywords | graphite / Pt(111) / Ag(110) / methane / multiphoton photoelectron spectroscopy / ultraviolet photoelectron spectroscopy / photochemistry / surface state |
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| Research Abstract |
We have investigated mainly the following subjects using nano-structured materials, including pseudo-one dimensional surface compound of AgO, nanographene, and ultrathin layers of copper :
1. Surface reactions on clean and oxygen-covered Ag(110) surfaces.
We clarified the mechanism of uv-light induced-phbtoelimination reaction of oxygen as follows. The reaction is initiated with electronic excitation of AgO chains, the reaction of excited AgO with carbidic carbon to form CO, and the rapid oxidation of CO to produce CO2.
2. Electronic structure of nanographene on Pt(111):
This was investigated by multiphoton photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. We identified an unoccupied σ* state located at 4 eV above the Fermi level, which is very sensitive to modification by deuterium.
3. Photochemistry of methane on ultrathin copper layers and oxygen modified Pt(111)
We prepared ultrathin copper films on Pt(111) and investigated the photochemistry of methane. The reaction cross sections depend on the number of copper layers. On the monolayer copper, the photochemistry resembles to that on Pt(111) and gradually changes to that on bulk copper surfaces as the number of layers increases. In addition, we compared the photochemistry on the oxygen-covered Pt(111) with that on the clean Pt(111) and found that methoxy group is produced and the reaction proceeds without poisoning by methyl product.
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