Exploring the chemical enhancement for surface-enhanced Raman scattering with Au bowtie nanoantennas

被引：276

作者：

Fromm, DP ^{[1
]}

Sundaramurthy, A

Kinkhabwala, A

Schuck, PJ

Kino, GS

Moerner, WE

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2006年 / 124卷 / 06期

关键词：

D O I：

10.1063/1.2167649

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：

Single metallic bowtie nanoantennas provide a controllable environment for surface-enhanced Raman scattering (SERS) of adsorbed molecules. Bowties have experimentally measured electromagnetic enhancements, enabling estimation of chemical enhancement for both the bulk and the few-molecule regime. Strong fluctuations of selected Raman lines imply that a small number of p-mercaptoaniline molecules on a single bowtie show chemical enhancement > 10(7), much larger than previously believed, likely due to charge transfer between the Au surface and the molecule. This chemical sensitivity of SERS has significant implications for ultra-sensitive detection of single molecules.

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页数：4

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