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

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发布日期 2003-06-18

DOI 10.1039/B302409A

影响因子 4.616

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

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Current Pharmaceutical Biotechnology

Photochemical & Photobiological Sciences

Molecular Diversity

Angewandte Chemie International Edition

Mini-Reviews in Medicinal Chemistry

Green Chemistry

Advanced Engineering Materials

CrystEngComm

Contact Lens & Anterior Eye

Physical Chemistry Chemical Physics

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Analyst

CiteScore: 7.8

自引率: 5.6%

年发文量: 653

Analyst publishes analytical and bioanalytical research that reports premier fundamental discoveries and inventions, and the applications of those discoveries, unconfined by traditional discipline barriers.

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

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