Surface enhanced Raman scattering as a probe of adsorbate-substrate charge-transfer excitations

被引：30

作者：

Kambhampati, P ^{[1
]}

Campion, A ^{[1
]}

机构：

[1] Univ Texas, Dept Chem & Biochem, Austin, TX 78712 USA

来源：

SURFACE SCIENCE | 1999年 / 427-28卷

基金：

美国国家科学基金会;

关键词：

alkali metals; cesium; charge transfer copper; electron energy loss spectroscopy; excited states; fermi energy; image potential states; localization; metal surfaces; pyromellitic dianhydride; surface enhanced Raman scattering; surface states; work function;

D O I：

10.1016/S0039-6028(99)00245-9

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：

The chemical mechanism of surface enhanced Raman scattering (SERS) is used as a probe of adsorbate-substrate charge-transfer excitations on atomically smooth, single crystal copper surfaces in ultra-high vacuum. It is demonstrated that SERS and charge-transfer excitations are supported on atomically smooth surfaces in contradiction to earlier consensus. The combination of SERS with electron energy loss spectroscopy (EELS) provides a great deal of insight into the nature of these excitations. It is found that these excitations are sensitive probes of local electronic structure at metal surfaces. The spatial extent, transition moment, and excited state potential energy surfaces of these excitations are probed using SERS, EELS and molecular spectroscopy simulations. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：115 / 125

页数：11

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