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Titolo:
INFRARED-ABSORPTION ENHANCEMENT OF P-CYANOBENZOIC ACID ON SILVER ISLAND FILMS DEPOSITED ON OXIDIZED AND HYDROGEN-TERMINATED SI(100) SURFACES
Autore:
WADAYAMA T; SUZUKI O; SUZUKI Y; HATTA A;
Indirizzi:
TOHOKU UNIV,FAC ENGN,DEPT MAT SCI SENDAI MIYAGI 98077 JAPAN
Titolo Testata:
Applied physics A: Materials science & processing
fascicolo: 5, volume: 64, anno: 1997,
pagine: 501 - 506
SICI:
0947-8396(1997)64:5<501:IEOPAO>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
TOTAL-REFLECTION SPECTRA; AG FILMS; KRETSCHMANN CONFIGURATION; NITROBENZOIC ACID; ATR GEOMETRY; SPECTROSCOPY; MONOLAYERS; ADSORPTION; DESORPTION; INTERFACE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
T. Wadayama et al., "INFRARED-ABSORPTION ENHANCEMENT OF P-CYANOBENZOIC ACID ON SILVER ISLAND FILMS DEPOSITED ON OXIDIZED AND HYDROGEN-TERMINATED SI(100) SURFACES", Applied physics A: Materials science & processing, 64(5), 1997, pp. 501-506

Abstract

Infrared absorption measurements of thin p-cyanobenzoic acid (PCBA) films have been performed in the Kretschmann ATR geometry in which an island film of silver was deposited in vacuum onto an oxidized or hydrogen-terminated silicon(100) prism surface. It is found that in comparison to the normal ATR measurement (without silver) of PCBA on the oxidized Si(100) surface the absorption intensity of the v(C = N) mode is approximately an order of magnitude enhanced by the presence of a silver island film of 5 nm in mass thickness on that surface but a more enhancement by a factor of 1.7 is obtained with the same thickness of silver on the H-terminated Si(100) surface. The different magnitudes of the absorption enhancement are explained on the basis of the FE-SEM micrographs of silver islands prepared on oxidized and H-terminated Si(100) wafers. A more detailed analysis shows that the enhancement occursnot only for ionized PCBA adsorbed via the carboxylate group on surface silver oxide, but for hydrogen-bonded PCBA presumably condensed on the ionized species. This observation is explained in terms of an electromagnetic field enhancement at the metal island surfaces.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 07:04:53