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Correlation between stick-slip frictional sliding and charge transfer

机译:粘滑摩擦滑动与电荷转移之间的相关性

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摘要

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 polym-ethylmethacrylate 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.
机译:十年前,Budakian和Putterman [Phys。牧师[J.Am.Chem.Soc.85,1000(2000)]将摩擦归因于当将表面力设备的金尖端拖动到聚甲基丙烯酸甲酯表面上时由接触充电引起的键的形成。我们提出了一种粘滑模型,该模型捕获了粘滑事件和电荷转移之间观察到的相关性,并且缺乏连接力跃迁和电荷转移对正常载荷的比例因子的依赖性。在此,粘滑动力学是粘弹性和塑性变形时间尺度之间的竞争,而竞争是由于接触充电的拉动速度所起的作用较小。我们的模型为解释大多数实验结果提供了另一种基础,而又不增加接触充电的摩擦力。

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