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Proceedings Paper

Structure and dynamics of fullerenes adsorbed on the Au(111) surface
Author(s): Song Guo; Daniel Fogarty; Phillip Nagel; S. Alex Kandel
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Paper Abstract

Scanning tunneling microscopy was used to characterize the structure of partial monolayers of C60 and C70 on the Au(111) surface. Both 2√3 × 2√3 R30° and 7 × 7 lattice symmetries were observed for C60 monolayers, in accordance with previous results. For C70 monolayers, structures are observed with rotation angles of 0°, 30°, and 14° with respect to the underlying substrate; we propose a previously unreported √13 × √13 R13.9° lattice structure to explain this last observation. Time sequences of STM images show that while fullerene monolayers are largely stable, molecular motion can be observed on the timescale of minutes or hours. For C60, thermal diffusion is the predominant cause of this motion, and STM perturbation of the sample is negligible. In contrast, C70 is observed to diffuse far more slowly; under normal scanning conditions, tip-induced motion is the major effect.

Paper Details

Date Published: 14 October 2004
PDF: 11 pages
Proc. SPIE 5513, Physical Chemistry of Interfaces and Nanomaterials III, (14 October 2004); doi: 10.1117/12.559800
Show Author Affiliations
Song Guo, Univ. of Notre Dame (United States)
Daniel Fogarty, Univ. of Notre Dame (United States)
Phillip Nagel, Univ. of Notre Dame (United States)
S. Alex Kandel, Univ. of Notre Dame (United States)

Published in SPIE Proceedings Vol. 5513:
Physical Chemistry of Interfaces and Nanomaterials III
Gregory V. Hartland; Xiao-Yang Zhu, Editor(s)

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