Friction and Dissipation in Epitaxial Graphene Films
Tobin Filleter(McGill University), J. L. McChesney(Lawrence Berkeley National Laboratory), Aaron Bostwick(Lawrence Berkeley National Laboratory), Eli Rotenberg(Lawrence Berkeley National Laboratory), K. V. Emtsev(Friedrich-Alexander-Universität Erlangen-Nürnberg), Thomas Seyller(Friedrich-Alexander-Universität Erlangen-Nürnberg), K. Horn(Fritz Haber Institute of the Max Planck Society), Roland Bennewitz(McGill University)
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Abstract
We have studied friction and dissipation in single and bilayer graphene films grown epitaxially on SiC. The friction on SiC is greatly reduced by a single layer of graphene and reduced by another factor of 2 on bilayer graphene. The friction contrast between single and bilayer graphene arises from a dramatic difference in electron-phonon coupling, which we discovered by means of angle-resolved photoemission spectroscopy. Bilayer graphene as a lubricant outperforms even graphite due to reduced adhesion.
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