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Origin of static friction and its relationship to adhesion at the atomic scale

Zhang, Qing and Qi, Yue and Hector, Louis G., Jr. and Çağin, Tahir and Goddard, William A., III (2007) Origin of static friction and its relationship to adhesion at the atomic scale. Physical Review B, 75 (14). Art. No. 144114. ISSN 1098-0121. doi:10.1103/PhysRevB.75.144114.

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Using atomic scale interfaces consisting of slabs of the same materials, we study the relationship between adhesion and static friction. The work of separation, which is a measure of adhesion, and the spatial variation of the interface potential energy along the sliding direction are computed for both commensurate and incommensurate Al2O3/Al2O3 interfaces, and incommensurate smooth and rough Al/Al interfaces. These values are compared with the predicted static friction stress resulting from constant force and constant velocity molecular dynamics simulations. Simulation results show that static friction is not determined by the absolute value of adhesion. Rather, it is determined by the change of potential energy along the sliding direction.

Item Type:Article
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URLURL TypeDescription
Çağin, Tahir0000-0002-3665-0932
Goddard, William A., III0000-0003-0097-5716
Additional Information:© 2007 The American Physical Society. (Received 19 June 2006; revised 27 November 2006; published 27 April 2007) The authors wish to acknowledge Y.T. Cheng and M.H. Müser for useful discussions on the results. Support of the Caltech research was provided through a grant from General Motors. The facilities of MSC are supported by funding from ONR-DURIP, ARO-DURIP, and Beckman Institute with additional funding from NSF, NIH, DoE, ONR, DARPA, Nissan, ChevronTexaco, Dow-Corning, Intel, Aventis Pharma, and Berlex Biopharma.
Subject Keywords:aluminium; alumina; slabs; molecular dynamics method; stiction; adhesion; interface structure; rough surfaces
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Issue or Number:14
Record Number:CaltechAUTHORS:ZHAprb07a
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8565
Deposited By: Archive Administrator
Deposited On:20 Aug 2007
Last Modified:08 Nov 2021 20:51

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