Hp. Lang et al., SCANNING-TUNNELING-MICROSCOPY STUDY OF FULLERENE THIN-FILMS ON AU(III), Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 244, 1994, pp. 283-288
The surface of C-60/70(111) thin films on Au(111) has been investigate
d by scanning tunneling microscopy (STM). Two types of ball-shaped mol
ecules - differing in diameter and corrugation, C-60 and C-70 - build
up a hexagonal lattice. The C-70 content in the films, determined by c
ounting the C-70 molecules in the STM images, corresponds well to the
C-70 content determined by high pressure liquid chromatography on hexa
ne solutions of the fullerene powders. STM images show lattice defects
such as vacancies, interstitials, twin- and stacking boundaries. Dyna
mic motion of C-70 molecules is observed. Different submonolayer cover
ages are documented by STM images as a function of film deposition tim
e.