Study of photochemical reaction from C sub 70 adsorbed on silver film by surface enhanced Raman scattering

The surface enhanced Raman scattering (SERS) spectra of about 2 monolayers of C sub 70 on Ag surface were measured by micro-Raman spectroscopy. New Raman bands of the fullerene molecule were found. The time evolution (from C sub 70 to amorphous carbon) of the SERS spectra, under high laser power density illumination in air, provides evidence of photochemical reactions. New bands in the Raman spectra appearing with the time were attributed to intermediate products of these photochemical reactions.