原子尺度下粘滑的研究

Research on stick-slip at atomic scale

界面间的摩擦是一个古老的物理化学问题,从实践上来说也是一个重要的问题。最近,新实验工具的发展,人们可以在纳米尺度下更详细地研究摩擦,导致微观摩擦研究蓬勃的发展。在纳米尺度下的分子系统中观察到了许多引人入胜的动力学特征,比如粘滑运动,在临界速度之上时,力的振荡以及跃迁滑移是间歇性粘滑的特征。为了研究原子尺度下粘滑运动的起源,利用分子动力学模拟的方式在一个简单模型下对其进行研究。在模拟过程中,研究了滑块的摩擦力、速度以及压力,我们发现预测结果和分子动力学模拟结果相当吻合。

Interfacial friction is one of the oldest problems in physics and chemistry and certainly one of the most important problems from a practical point of view.Recently,new experimental tools have been developed that allow for detailed investigations of friction at nanometer length scales,and which have led to an increase in activity in the study of interfacial friction on the microscopic level.Intriguing dynamical features have been observed experimentally in nanoscale molecular systems,such as stick-slip moti...