中文摘要：

为揭示超薄膜的摩擦特性与微观结构的关系，运用分子动力学模拟的方法对其进行研究，采用固液比作为流体膜固化的定量描述，分别讨论温度、分子层数对固液比和摩擦力的影响。仿真结果表明，摩擦力随固液比的增大而增大；当壁面原子与液体膜原子的质量比增大时，会造成固液比缓慢上升，但摩擦力却随之下降，固液间滑移长度的增大是造成这一现象的主要原因。

英文摘要：

Molecular dynamics simulation is employed to investigate the relation between the properties of ultra-thin films and their microstructure. Solid-to-liquid ratio is introduced to estimate the solid-like of microstructure. In the process of simulation, the effects of the temperature and the film thickness on the solid-to-liquid ratio and the friction force are investigated. It is concluded that the friction force increases with the solid-to-liquid ratio. But the atomic mass of the solid wall has reverse effects on this phenomenon. It is postulated that the slip length increases with the increase of the atomic mass of the solid wall, which in turn reduces the friction force.