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Correlation between stick-slip frictional sliding and charge transfer

Ananthakrishna, G and Kumar, Jagadish (2010) Correlation between stick-slip frictional sliding and charge transfer. In: Physical Review B: Condensed Matter and Materials Physics, 82 (7).

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Official URL: http://prb.aps.org/abstract/PRB/v82/i7/e075414

Abstract

A decade ago, Budakian and Putterman [Phys. Rev. Lett. 85, 1000 (2000)] 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: Journal Article
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 06 Sep 2010 10:59
Last Modified: 19 Sep 2010 06:15
URI: http://eprints.iisc.ernet.in/id/eprint/31966

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