Issue 7, 2003
From the journal:

Analyst

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

Nikhil R. Janaa  

a Department of Chemistry, Raja Rammohun Roy Mahavidyalaya, Radhanagar, Hooghly-712406, WB, India
E-mail: njana@mailcity.com

Abstract

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 × 10−11 mol dm−3 4-mercaptopyridine and 5 × 10−10 mol dm−3 rhodamine 6G.

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Article information

DOI
https://doi.org/10.1039/B302409A
Article type
Paper
Submitted
03 Mar 2003
Accepted
03 May 2003
First published
18 Jun 2003

Analyst, 2003,128, 954-956

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

N. R. Jana, Analyst, 2003, 128, 954 DOI: 10.1039/B302409A

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