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Microscale study of frictional properties of graphene in ultra high vacuum

: Marchetto, D.; Feser, T.; Dienwiebel, M.

Fulltext urn:nbn:de:0011-n-3704555 (2.0 MByte PDF)
MD5 Fingerprint: 4dff74a3f9d885cd2398d9de94f6893c
Created on: 26.11.2016

Friction 3 (2015), No.2, pp.161-169
ISSN: 2223-7704
ISSN: 2223-7690
Bundesministerium für Bildung und Forschung BMBF
Journal Article, Electronic Publication
Fraunhofer IWM ()
graphene; SiC; friction; vacuum; microtribology; anisotropy

We report on the frictional proper ties of epitaxial graphene on SiC in ultra high vacuum. Measurements have been performed using a microtribometer in the load regime of 0.5 to 1 mN. We observed that a ruby sphere sliding against graphene results in very low friction coefficients ranging from 0.02 to 0.05. The friction and also the stability of the graphene layer is higher than that under similar conditions in ambient conditions. The friction shows a load dependence. Finally it was found that graphene masks the frictional anisotropy which was observed on the SiC surface.