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  • Title: Temperature effect on the SERS signature of p-aminothiophenol: a new evidence for the production of p,p'-dimercaptoazobenzene on metallic nanostructures.
    Author: Canpean V, Astilean S.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2012 Oct; 96():862-7. PubMed ID: 22925915.
    Abstract:
    We investigated the effect of the temperature of the plasmonic substrate on the surface enhanced Raman scattering of p-aminothiophenol adsorbed onto a particulate film of gold nanoparticles-decorated polystyrene nanospheres. The results demonstrated that temperature induces important modifications in the overall spectral signature of the charge transfer bands, which are consistent with the generation of a new molecular species. Moreover, the analysis of the shape of the vibrational band at 1078 cm(-1) assigned to the >C-S mode, which is enhanced by electromagnetic mechanism, reveals the co-existence of two distinct bands at 1071 and 1078 cm(-1), assignable to p,p'-dimercaptoazobenzene and p-aminothiophenol, respectively.
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