Abstract
Self-assembled nanoparticle (NP) clusters exhibit unique electromagnetic responses and have attracted considerable interest due to their potential for controlling colors, refractive indices, and electromagnetic enhancement via the strong interaction between light and matter. Surface-enhanced Raman scattering (SERS) from molecules adsorbed on the nanoparticle clusters is one of the notable properties of NP clusters. In this report, gold NP clusters based on polymer core−shell particles incorporating magnetic iron oxide NPs were prepared via a self-assembly method.The enhancement factor of the SERS signal was determined by the size of composited gold nanoparticles.These composite particles are expected to be applicable to the is situ SERS analysis of chemical species in chemical reaction media and biological samples.
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