[Surface-enhanced Raman scattering studies of C60 on Ag electrodes in nonaqueous solution]

The spectroscopic characteristics of C60 on Ag electrodes in nonaqueous solution were studied by surface-enhanced Raman scattering (SERS) technique. The potential-dependent SER spectra of the C60 cluster indicate that a difference (about 400 mV) between the oxidation potential and the reduction potential appears when the potential scans negatively and positively. It is explained by that changes of electromagnetic field on Ag influence the structure of C60 molecule greatly. According to the SER spectra of C60 adsorbed on Ag electrodes, it was found that the symmetry of C60 is reduced because of Jahn-Teller distortion, and this decrease causes the changes in its SER spectra.