The chemical effect in surface enhanced Raman scattering (SERS) for piperidine adsorbed on a silver electrode
The relative SERS enhancement factors for piperidine on a silver electrode were determined as a function of the incident wavelength and applied potential. The charge transfer effect ( G CT) on Raman intensity was estimated from these data. The total chemical effect, which is defined as a product of...
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Published in: | Surface science Vol. 368; no. 1; pp. 396 - 400 |
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Main Authors: | , |
Format: | Journal Article Conference Proceeding |
Language: | English |
Published: |
Lausanne
Elsevier B.V
10-12-1996
Amsterdam Elsevier Science New York, NY |
Subjects: | |
Online Access: | Get full text |
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Summary: | The relative SERS enhancement factors for piperidine on a silver electrode were determined as a function of the incident wavelength and applied potential. The charge transfer effect (
G
CT) on Raman intensity was estimated from these data. The total chemical effect, which is defined as a product of
G
CT and the so-called “active sites” effect, amounts to at least 15 for piperidine adsorbed on silver (a system for which “charge transfer” is from the adsorbed molecule to the metal). This chemical enhancement factor is very close to that for pyridine adsorbed on silver (“charge transfer” from the metal to the adsorbed molecule). Thus, the short-range enhancement mechanism can be equally effective for both directions of “charge transfer”. |
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Bibliography: | SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3 |
ISSN: | 0039-6028 1879-2758 |
DOI: | 10.1016/S0039-6028(96)01082-5 |