Thompson P A, Robbins M O
Science. 1990 Nov 9;250(4982):792-4. doi: 10.1126/science.250.4982.792.
Molecular dynamics simulations of atomically thin, fluid films confined between two solid plates are described. For a broad range of parameters, a generic stick-slip motion is observed, consistent with the results of recent boundary lubrication experiments. Static plates induce crystalline order in the film. Stick-slip motion involves periodic shear-melting transitions and recrystllization of the film. Uniform motion occurs at high velocities where the film no longer has time to order. These results indicate that the origin of stick-slip motion is thermodynamic instability of the sliding state, rather than a dynamic instability as usually assumed.
描述了限制在两个固体板之间的原子级薄流体膜的分子动力学模拟。在很宽的参数范围内，观察到一种通用的粘滑运动，这与最近的边界润滑实验结果一致。静态板在膜中诱导出晶体有序。粘滑运动涉及膜的周期性剪切熔化转变和再结晶。在高速下发生均匀运动，此时膜不再有时间形成有序结构。这些结果表明，粘滑运动的起源是滑动状态的热力学不稳定性，而不是通常所认为的动态不稳定性。
