Adsorption behavior of C60 fullerene on golden crystal nanoparticles

The surface-enhanced Raman scattering (SERS) of C60 adsorbed on aqueous gold colloid was reported for the first time. We used the pyridine molecule as a intermediate to connect and fix the C60 molecule to the surface of the golden crystal nanoparticle. The enhancement factor is 104. Not only was the number of vibrational modes greatly increased, but also were the significant Raman bands splitted as well as frequencies up and down shifted, respectively, arising from symmetry lowering and selection rule relaxing of C60 induced by the gold surface. The splittings of the Raman modes is consistent with the calculation based on group theory.