The influence of oxygen on the Raman spectrum of C60 films

Abstract The influence of oxygen exposure on the Raman spectrum of C60 microscrystalline films under laser irradiation is described. In the frequency region of the symmetric Ag pentagonal pinch mode, exposure of vacuum grown C60 films to 16O2, 18O2, or air results in the appearance of a peak at 1467 cm-1, a mode previously attributed to pure C60. The time dependence of this mode in the laser beam, as well as the Raman spectrum of pristine C60 are discussed.