Abstract
Fullerene thin films have been prepared on Au(111) substrates by sublimation from fullerene powders with different C60 / C70 ratios. Scanning tunneling microscopy (STM) images of the film surfaces show a hexagonal lattice built-up of two types of ball-shaped molecules (differing in diameter and corrugation). The ratio of smaller to larger balls compares well with the C60/ C70 ratio determined by high pressure liquid chromatography (HPLC) on hexane solutions of the respective fullerene powders. STM images show defects such as vacancies, interstitials and boundaries between different stacking domains (ABC and CBA). Dynamic displacement of C70 molecules and vacancies is observed.
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