A high-throughput method for controlled hot-spot fabrication in SERS-active gold nanoparticle dimer arrays

被引：100

作者：

Alexander, Kristen D. ^{[1
]}

Hampton, Meredith J. ^{[2
]}

Zhang, Shunping ^{[3
]}

Dhawan, Anuj ^{[4
]}

Xu, Hongxing ^{[3
]}

Lopez, Rene ^{[1
]}

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27515 USA

[2] Univ N Carolina, Dept Chem, Chapel Hill, NC USA

[3] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

[4] Duke Univ, Dept Biomed Engn, Durham, NC 27706 USA

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 2009年 / 40卷 / 12期

基金：

美国国家科学基金会;

关键词：

surface-enhanced Raman scattering (SERS); gold nanoparticles; hot spot; enhancement factor; templating; ENHANCED RAMAN-SCATTERING; METAL NANOPARTICLES; AG NANOPARTICLES; SURFACE; SPECTROSCOPY; MOLECULES; FIELD; NANOCRYSTALS; SPHERES;

D O I：

10.1002/jrs.2392

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

We present a high-throughput method for fabricating large arrays of surface-enhanced Raman scattering (SERS) active gold dimers. Using a large-area/low-cost nanopatterning method in conjunction with a meniscus force deposition technique, we were able to create large arrays of uniformly spaced nanoclusters comprising two 60-nm gold nanospheres. Raman measurements of a thiophenol monolayer deposited on smaller scale arrays of aligned dimers yielded enhancement factors as high as 10(9). Polarization-control led measurements show spectral peak heights to be 10-100 times smaller when the incident beam is polarized perpendicularly to the dimer axis, confirming that the measured enhancements arise from the 'hot spots' between the two nanospheres. Copyright (C) 2009 John Wiley & Sons, Ltd.

引用

页码：2171 / 2175

页数：5

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