IN-SITU HIGH-RESOLUTION FT-IR STUDY OF THE GLASS-TRANSITION IN A C-60FILM

The infrared absorption spectra of a water-free C-60 film were examine d in the range 82-100 K, using in situ high-resolution (0.25 cm(-1)) F ourier transform infrared (FT-IR) spectroscopy. The changes in the hal f-widths and integrated absorbances of the four fundamental and five s ilent modes were observed at 84-88 K, which is in good agreement with previously reported values of 85-90 K for the glass transition. On the ether hand, no noticeable change in the peak positions of the four fu ndamental and silent modes was observed upon the glass transition.