Surface enhanced infrared absorption (SEIRA) spectroscopy on nanoshell aggregate substrates

被引：203

作者：

Kundu, Janardan ^{[1
,3
]}

Le, Fei ^{[1
,4
]}

Nordlander, Peter ^{[1
,4
]}

Halas, Naomi J. ^{[1
,2
,3
]}

机构：

[1] Rice Univ, Lab Nanophoton, Houston, TX 77005 USA

[2] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA

[3] Rice Univ, Dept Chem, Houston, TX 77005 USA

[4] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 452卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2007.12.042

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：

Aggregates of An nanoshells on silicon substrates with plasmon resonances tuned to the infrared region of the spectrum provide a remarkably high-quality substrate for surface enhanced infrared absorption (SEIRA) spectroscopy. SEIRA spectra spanning the chemical fingerprint region of 700-3300 cm(-1) with strong enhancement across this entire spectral range are obtained. SEIRA enhancement factors obtained for para-mercaptoaniline on these substrates are evaluated to be in the 104 range, based on a statistical evaluation of aggregate geometries combined with finite difference time domain modeling of the infrared 'hot spots' characteristic of the constituent structures. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：115 / 119

页数：5

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