Fluctuations of surface-enhanced Raman spectra of CO adsorbed on gold substrates

被引：57

作者：

Kudelski, A

Pettinger, B

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[2] Univ Warsaw, Dept Chem, PL-02093 Warsaw, Poland

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 383卷 / 1-2期

关键词：

D O I：

10.1016/j.cplett.2003.11.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Surface-enhanced Raman scattering (SERS) of CO adsorbed on roughened gold surfaces has been studied using a Raman microscope with high spatial resolution. Sequentially recorded SERS spectra showed variations of Raman lines in their number, intensity, frequency, and halfwidth. Sometimes, in addition to the band for CO adsorbed at top sites, Raman peaks for bridge-bonded CO appear, showing large intensity fluctuations. Obviously, SERS fluctuations represent a more general property of SERS and point to local restructuring of substrates that changes temporarily the character of adsorption sites and/or their contribution to SERS. The single molecule 'blinking' effect is also discussed. (C) 2003 Elsevier B.V. All rights reserved.

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页码：76 / 79

页数：4

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