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Publication Citation: Anomalous Friction in Suspended Graphene

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Author(s): Alexander Y. Smolyanitsky; Jason P. Killgore;
Title: Anomalous Friction in Suspended Graphene
Published: September 20, 2012
Abstract: Since the discovery of the Amonton's law and with support of modern tribological models, friction between surfaces of three-dimensional materials is known to generally increase when the surfaces are in closer contact. Here, using molecular dynamics simulations of friction force microscopy on suspended graphene, we demonstrate an increase of  friction when the scanning tip is retracted away from the sample. We explain the observed behavior and address why this phenomenon has not been observed for isotropic 3D materials.
Citation: Nature Materials
Volume: 86
Pages: 5 pp.
Keywords: nanotribology;graphene;friction;molecular dynamics;simulation;anomalous friction;viscoelastic ploughing;
Research Areas: Surface Physics, Nanomaterials
DOI: http://dx.doi.org/10.1103/PhysRevB.86.125432  (Note: May link to a non-U.S. Government webpage)