Shell Thickness-Dependent Plasmon Coupling and Creation of SERS Hot Spots in Au@Ag Core-Shell Nanostructures

被引：0
|
作者：
B. Aswathy
G. Sony
K. G. Gopchandran
机构：
[1] University of Kerala,Department of Chemistry
[2] University of Kerala,Department of Optoelectronics
来源：
Plasmonics | 2014年 / 9卷
关键词：
SERS; Au@Ag core-shell nanoparticles; Dimers; Hot spots;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The main objective of the present study is to investigate the shell thickness-dependent Raman enhancement activity of silver-coated gold nanoparticles (Au@Ag NPs) when bound to a model analyte 2-mercaptobenzoic acid (2-MBA). With an optimized Ag:Au ratio, dimeric and trimeric Au@Ag nanostructures were prepared in the presence of 2-MBA and are characterized by spectroscopic and microscopic techniques. These dimeric junctions act as hot spots and the molecules trapped at these junctions showed higher Raman signal enhancements due to the presence of amplified electric field.
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页码：1323 / 1331
页数：8
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