Superlubricity of Graphite

Details Superlubricity of Graphite Superlubricity of Graphite

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrvl..92l6101d&link_type=abstract

Physical Review Letters, vol. 92, Issue 12, id. 126101

Physics

154

Atomic Scale Friction, Friction Force Microscopes, Tribology And Hardness, Atomic Force Microscopy

Scientific paper

Using a home-built frictional force microscope that is able to detect forces in three dimensions with a lateral force resolution down to 15 pN, we have studied the energy dissipation between a tungsten tip sliding over a graphite surface in dry contact. By measuring atomic-scale friction as a function of the rotational angle between two contacting bodies, we show that the origin of the ultralow friction of graphite lies in the incommensurability between rotated graphite layers, an effect proposed under the name of “superlubricity” [

M. Hirano and K. Shinjo, Phys. Rev. BPRBMDO0163-1829 41, 11 837 (1990)10.1103/PhysRevB.41.11837

].

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