Amplification of surface-enhanced Raman scattering by the oxidation of capping agents on gold nanoparticles.

ABSTRACT: Surface-enhanced Raman spectroscopy is a powerful analytical method, and is especially useful for the detection of nitrogen- and sulfur-containing organic substances in trace amounts. SERS substrates with high enhancement factors can be produced via the aggregation of gold nanoparticles, leading to the formation of 'hot spots' - regions of highest electric field intensity and Raman scattering enhancement. Thus, the availability of gold surfaces in 'hot spots' for the adsorption of analyte molecules strongly influences the enhancement factor of a substrate. We studied the kinetics of oxidation of dyes with hydrogen peroxide in the presence of citrate-capped gold nanoparticles and discovered the amplification of surface-enhanced Raman scattering, probably due to the oxidation of citra

SUBMITTER: Gorbachevskii MV 

PROVIDER: S-EPMC9080636 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature