论文标题
潮湿的疏水纳米接触中动态摩擦的性质
Nature of dynamic friction in a humid hydrophobic nano-contact
论文作者
论文摘要
在水分子污染表面上动态摩擦的物理学仍然鲜为人知。根据对工业应用的疏水接触的日益兴趣，本文着重于此类界面中的摩擦机制。作为一种常用的材料，基于使用圆形模式原子力显微镜技术与分子动力学模拟结合的实验研究，在双重方法中考虑与石墨的接触。我们证明，应完善直观的范式，该范式断言水分子是从疏水接触中挤出的。结果，我们引入了一种机制，考虑到通过在底物上吸附的水的积累在滑动纳米接触中产生的液滴。然后，我们表明疏水底物上液滴滑动的完整滑动状态解释了实验摩擦学行为。
The physics of dynamic friction on water molecule contaminated surfaces is still poorly understood. In line with the growing interest in hydrophobic contact for industrial applications, this paper focuses on friction mechanisms in such interfaces. As a commonly used material, contact with graphite is considered in a twin-fold approach based on experimental investigations using the circular mode atomic force microscopy technique combined with molecular dynamic simulations. We demonstrate that an intuitive paradigm, which asserts that water molecules are squeezed out of a hydrophobic contact, should be refined. As a consequence, we introduce a mechanism considering a droplet produced within the sliding nano-contact by the accumulation of water adsorbed on the substrate. Then we show that a full slip regime of the droplet sliding on the hydrophobic substrate explains the experimental tribological behavior.
