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The transition from atomic stick-slip to continuous sliding has been observed in a number of ways. If extended contacts are moved in different directions, so-called structural lubricity is observed when the two surface lattices are non-matching. Alternatively, a "superlubric" state of motion can be achieved if the normal force is reduced below a certain threshold, the temperature is increased, or the contact is actuated mechanically. These processes have been partially demonstrated using atomic force microscopy, and they can be theoretically understood by proper modifications of the Prandtl−Tomlinson model.


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Superlubricity on the nanometer scale

Show Author's information Ernst MEYER1( )Enrico GNECCO2
Department of Physics, University of Basel, Klingelbergstr. 82, 4056 Basel, Switzerland
IMDEA Nanociencia, Campus Universitario de Cantoblanco, Calle Faraday 9, 28049 Madrid, Spain

Abstract

The transition from atomic stick-slip to continuous sliding has been observed in a number of ways. If extended contacts are moved in different directions, so-called structural lubricity is observed when the two surface lattices are non-matching. Alternatively, a "superlubric" state of motion can be achieved if the normal force is reduced below a certain threshold, the temperature is increased, or the contact is actuated mechanically. These processes have been partially demonstrated using atomic force microscopy, and they can be theoretically understood by proper modifications of the Prandtl−Tomlinson model.

Keywords: atomic force microscopy, structural lubricity, dynamic superlubricity, friction force microscopy, themolubricity, Prandtl−Tomlinson model

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Publication history
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Publication history

Received: 31 March 2014
Revised: 28 April 2014
Accepted: 14 May 2014
Published: 03 June 2014
Issue date: June 2014

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© The author(s) 2014

Acknowledgements

E. M. acknowledges financial support by the Swiss National Science Foundation (SNF), the Commission for Technology and Innovation (CTI), COST Action MP1303 and the Swiss Nanoscience Institute (SNI). E. G. acknowledges the Spanish Ministry of Economy and Competitiveness (MINECO) Project MAT2012- 26312.

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