Surface-induced photoreaction of 4-nitrobenzenethiol on silver: influence of SERS-active sites

被引：40

作者：

Lee, SJ

Kim, K ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Chem & Mol Engn, Lab Intelligent Interfaces, Seoul 151742, South Korea

[2] Seoul Natl Univ, Ctr Mol Catalysis, Seoul 151742, South Korea

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 378卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(03)01269-7

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：

We have examined how much the photolysis of 4-nitrobenzenethiol (4-NBT) to 4-aminobenzenethiol on Ag by visible light is affected by the nano- and atomic-scale roughness features of silver which are deeply associated with the electromagnetic (EM) and chemical (CHEM) enhancement mechanisms, respectively, in surface-enhanced Raman scattering. Both the CHEM and EM sites were indeed involved in the surface-induced photoreaction of 4-NBT on Ag, and the contribution of EM-sites to the overall photolysis appeared to be as much as similar to65%. These findings are in conformity with the fact that the photoelectron emission is strongly affected by the extent of the roughening specifically for Ag, which has a quite low oxidation potential. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：122 / 127

页数：6

共 13 条

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Chang R.K., 1982, Surface Enhanced Raman Scattering

[2] Single-molecule and single-nanoparticle SERS: Examining the roles of surface active sites and chemical enhancement [J].