Silver coated gold nanoparticles as new surface enhanced Raman substrate at low analyte concentration

被引：89

作者：

Jana, NR ^{[1
]}

机构：

[1] Raja Rammohun Roy Mahavidyalaya, Dept Chem, Hooghly 712406, WB, India

来源：

ANALYST | 2003年 / 128卷 / 07期

关键词：

D O I：

10.1039/b302409a

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Stable silver coated gold hydrosols, with particle size varying from 12 - 200 nm, were prepared and tested as a substrate for surface enhanced Raman scattering (SERS). Nanoparticles containing a 12 nm gold core and coated with a silver shell varying from 0 - 100 nm were prepared. It is shown that SERS sensitivity depends on the Ag shell thickness and nanoparticle size. The optimum particle size for SERS was found to be between 25 - 50 nm. These particles can detect 5 x 10(-11) mol dm(-3) 4-mercaptopyridine and 5 x 10(-10) mol dm(-3) rhodamine 6G.

引用

页码：954 / 956

页数：3

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