ABSTRACT
The fullerene nanofibers composed of C60, “C60 nanofibers,” were treated at various temperatures up to 3000°C in vacuum or in an Ar atmosphere. The structural characteristics of the heat-treated C60 nanofibers were examined by transmission electron microscopy and Raman spectroscopy. By high-temperature heat treatment, C60 nanofibers turned to the glassy carbon composed of randomly oriented graphitic ribbons. The interlayer spacing of the graphitic ribbons was found to decrease with the increasing number of the stacked layers; it became the (0002) spacing of graphite when the number was 53.
