Correlation between stick-slip frictional sliding and charge transfer

Ananthakrishna, G. ; Kumar, Jagadish (2010) Correlation between stick-slip frictional sliding and charge transfer Physical Review B: Condensed Matter and Materials Physics, 82 (7). 075414 _1-075414 _8. ISSN 1098-0121

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A decade ago, Budakian and Putterman [Phys. Rev. Lett. 85, 1000 (2000)]10.1103/PhysRevLett.85.1000 ascribed friction to the formation of bonds arising from contact charging when a gold tip of a surface force apparatus was dragged on polymethylmethacrylate surface. We propose a stick-slip model that captures the observed correlation between stick-slip events and charge transfer, and the lack of dependence of the scale factor connecting the force jumps and charge transfer on normal load. Here, stick-slip dynamics arises as a competition between the viscoelastic and plastic deformation time scales and that due to the pull speed with contact charging playing a minor role. Our model provides an alternate basis for explaining most experimental results without ascribing friction to contact charging.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:72023
Deposited On:28 Nov 2011 05:17
Last Modified:28 Nov 2011 05:17

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