Abstract
We fabricated two-dimensional assemblies of gold and silver nanoparticles on polycation coated substrates by a liquid–liquid interfacial precipitation method. The assembling of the metal nanoparticles on the substrate was evaluated by absorption spectroscopy and scanning electron microscopy. Raman scattering signals of Rhodamine 6G were detected on the metal nanoparticle-modified substrates. In particular, the intensities of the Raman scattering signals of the mixed gold and silver nanoparticle-modified substrates were larger than the intensities expected from a simple proportional sum of the Raman scattering signals of the individual assembly films composed of only gold or silver nanoparticles.
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