Contact ageing in atomic friction

Contact ageing in atomic friction
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原子摩擦中的接触老化

DOI:
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
P. Reimann
P. Reimann
中科院分区:
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文献类型:
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作者:
M. Evstigneev;A. Schirmeisen;L. Jansen;H. Fuchs;P. Reimann

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对原子力显微镜悬臂梁在高取向热解石墨上的粘滑运动进行了实验和理论研究。结果表明,间隙滑移的悬臂梁尖端在高拉动速度是热激活事件,可以用单步速率方程来描述。另一方面,在缓慢拉动时,滑动事件的统计数据偏离单步速率方法的预测,表明接触老化的开始,即,在每个粘附阶段中接触特性的逐渐变化。引入了一个模型,该模型考虑了接触老化效应,其预测结果与实验结果吻合良好的所有拉速。
The stick–slip motion of an atomic force microscope cantilever on highly oriented pyrolytic graphite is investigated experimentally and theoretically. It is shown that the interstitial slips of the cantilever tip at high pulling velocities are thermally activated events and can be described with a single-step rate equation. On the other hand, at slow pulling, the statistics of the slip events deviates from the predictions of the single-step rate approach, signaling the onset of contact ageing, that is, gradual changes of the contact properties in each stick phase. A model is introduced which takes the contact ageing effect into account, and whose predictions are in good agreement with the experimental results for all pulling velocities.
DOI: 10.1016/s0006-3495(03)74449-x
发表时间: 2003-07-01
影响因子: 3.4
作者:
Hummer, G;Szabo, A
通讯作者: Szabo, A
DOI: 10.1103/physrevlett.96.108101
发表时间: 2006-03-17
影响因子: 8.6
作者:
Dudko, OK;Hummer, G;Szabo, A
通讯作者: Szabo, A