van der Waals interactions mediating the cohesion of fullerenes on graphene
作者： M. Švec , P. Merino , Y. J. Dappe , C. González , E. Abad
DOI: 10.1103/PHYSREVB.86.121407
关键词:
摘要: Fullerenes on single-layer epitaxial graphene are a model system to study very faint interactions at molecular level. By variable temperature scanning tunneling microscope we have been able ordered fullerene layers 40 K, exclusively bound by van der Waals interactions. The experimentally determined adsorption geometry of the molecules is computationally confirmed only if included in calculation formalism. relative orientation fullerenes their close-packed arrangement found be crucial factor for determining total energy. Observation collective movements islands points out weak coupling substrate and important role cohesion forces within.
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