R. Luthi et al., FRICTIONAL AND ATOMIC-SCALE STUDY OF C-60 THIN-FILMS BY SCANNING FORCE MICROSCOPY, Zeitschrift fur Physik. B, Condensed matter, 95(1), 1994, pp. 1-3
Scanning force microscopy (SFM) was employed to characterize C60 islan
d films in an ultra-high vacuum (UHV). The initial growth stage of C60
on NaCl cleavage faces and nanotribological properties of this solid
lubricant are investigated. In comparison to the NaCl(001) face, highe
r friction is measured on the C60 islands, resulting in a ratio of fri
ction of 1:3 for NaCl:C60. The friction coefficient of the (111) orien
ted C60 island is determined to be 0.15+/-0.05. High-resolution SFM im
ages reveal the hexagonal lattice of the unreconstructed (111) top sur
faces and the overgrowth relationships of the C60 islands.