Abstract
The local density of electronic states has been measured on thin films using scanning tunneling spectroscopy (STS). A 0.8 eV energy gap and sharp features in with widths as small as 0.2 eV can be ascribed to the discrete molecular energy levels predicted for the molecule, broadened by intermolecular interactions. However, a more complete agreement between the experimental results and theoretical predictions occurs if the system is modeled as covalently bonded dimers and trimers. These results confirm the molecular nature of as well as its higher reactivity as compared to larger size fullerenes.
- Received 10 July 1998
DOI:https://doi.org/10.1103/PhysRevLett.82.165
©1999 American Physical Society