The reversible conversion between 4-aminothiophenol and p,p′-dimercaptoazobenzene is performed with a single Ag nanoparticles/graphene oxide nanocomposite (AgNPs/GO) via the assistance of local surface plasmons. The formation of p,p′-dimercaptoazobenzene on AgNPs/GO leads to the decrease in distance between adjacent AgNPs on a GO surface, enhancing the local electromagnetic field near AgNPs. This effect is beneficial to enhancing surface Raman enhanced scattering signals of Rhodamine 6G molecules.
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Wu et al. (2014) studied this question.
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