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Applied Physics Letters / Volume 96 / Issue 10 / STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

Appl. Phys. Lett. 96, 101902 (2010); http://dx.doi.org/10.1063/1.3356222 (3 pages)

Effect of trace moisture on friction

Y. Liu and I. Szlufarska

Materials Science and Engineering, University of Wisconsin–Madison, Wisconsin 53706, USA

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(Received 10 December 2009; accepted 16 February 2010; published online 9 March 2010)

We report that even in nominally dry conditions trace moisture present on hydrophilic surfaces of SiC leads to a considerable increase in friction via formation of hydrogen bonds across the sliding interface. We perform quantum mechanical calculations to demonstrate that frictional instabilities on such surfaces are related to formation and breaking of hydrogen bonds between surface hydroxyl groups and to the elastic rotation of these groups. We perform a theoretical analysis based on the modified Prandtl–Tomlinson model and we predict that in the presence of trace moisture friction force will have logarithmic dependence on the sliding velocity.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

ab initio calculations, hydrogen bonds, hydrophilicity, moisture, silicon compounds, sliding friction, wide band gap semiconductors

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3356222

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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