| Project/Area Number |
60470057
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Physical properties of metals
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
SUETAKA Wataru Faculty of Eng., Tohoku University, Professor, 工学部, 教授 (10005845)
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| Co-Investigator(Kenkyū-buntansha) |
OSAWA Masatoshi Faculty of Eng., Tohoku University, Assistant, 工学部, 助手 (00108466)
HATTA Aritada Faculty of Eng., Tohoku University, Associate Professor, 工学部, 助教授 (70005502)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 1986: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1985: ¥5,400,000 (Direct Cost: ¥5,400,000)
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| Keywords | Infrared Spectra / Surface Electromagnetic Wave / Total Reflection / Chemical Bonding At Interfaces / 電極表面 / その場測定 |
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| Research Abstract |
Infrared ATR spectroscopy of the Kretschmann configuration is a potential tool for the in-situ observation of species at metal/solid and metal/liquid interfaces. The infrared absorption of species at the interfaces are observed remarkably enhanced, and the enhancement has been proved to be very short-ranged. The mechanism of the enhancement has been investigated in the present work, and we have been successful in arriving at the conclusion that the enhancement stems from the strong electromagnetic field of local plasmon induced at cavities in the metal film.
We have applied this method to the investigation of species adsorbed on gold and silver electrodes, and were successful in observing in-situ the behavior of thiocyanate and cyanide ions adsorbed on the electrodes in changing the electrode potential. No signal of species in solution was appeared in the recorded spectra, showing that this method is excellent for the selective detection of interface species.
Nickel can be used as the thin metal film in the Kretschmann configuration. However, the enhancement is low in comparison to the noble metals (Au, Ag, Cu), and infrared absorptions are recorded as the increase in reflectivity provided the metal film is continuous.
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