Lubricated friction on nanopatterned surfaces via molecular dynamics simulations

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R. Capozza,¹ A. Fasolino,² M. Ferrario,¹ and A. Vanossi¹
¹CNR-INFM National Research Center S3 and Department of Physics, University of Modena and Reggio Emilia, Via Campi 213/A, 41100 Modena, Italy
²Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands

Received 11 October 2007; revised 22 April 2008; published 24 June 2008

Recentstudies have proved the usefulness of macroscopic surface patterning forthe improvement of tribological performances of sliding contacts. Here weinvestigate the effects of scaling down the texturing dimensions tothe nanoscale. By means of classical molecular dynamics simulations, weshow that the sliding frictional properties of a thin lubricantfilm are significantly affected by the presence of nanoscale superficialpatterning of the moving confining walls, leading to a “mitigation”of the so-called stick-slip regime and to a consequent reductionof friction. We believe these findings to be relevant fornanotechnology applications.

URL:	http://link.aps.org/doi/10.1103/PhysRevB.77.235432
DOI:	10.1103/PhysRevB.77.235432
PACS:	81.40.Pq; 46.55.+d; 68.35.Af; 68.08.-p 81.40.Pq Friction, lubrication, and wear 46.55.+d Tribology and mechanical contacts 68.35.Af Atomic scale friction (solid surfaces/interfaces) 68.08.-p Liquid-solid interfaces YEAR: 2008
KEYWORDS:	lubricants, lubrication, molecular dynamics method, nanopatterning, sliding friction, thin films

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Phys. Rev. B 77, 235432 (2008) [7 pages]

Lubricated friction on nanopatterned surfaces via molecular dynamics simulations

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A new free weekly publication from APS