Surface-enhanced Raman scattering of C₆₀ on co-modified substrate of Fe₃O₄ and Au nanoparticles

Surface-enhanced Raman scattering (SERS) spectrum of C₆₀ was obtained on Fe₃O₄ and Au nanoparticles co-modified substrate. The number of vibrational modes was greatly increased, especially some modes that were forbidden in Raman spectrum, appeared and even split as prediction of group theory. By introducing Fe₃O₄ magnetic nanoparticles, this co-modified substrate shows high SERS activity which is superior to bare Au nanoparticles modified substrate. Experimental results indicate that the co-modified substrate is very effective and active. It provides convenience for probing the C₆₀ molecule's vibrational structure, the physical properties and the adsorption behavior with high sensitivity, as well as the interaction of adsorbed molecules with substrate.