Science. 1994 Mar 25;263(5154):1741-4. doi: 10.1126/science.263.5154.1741.
The transition from rest to sliding contact of atomically smooth solids separated by molecularly thin liquid films was studied. The films could be deformed nearly reversibly to a large fraction of the film thickness. The modulus of elasticity and yield stress were low, considerably less than for a molecular crystal or glass in the bulk. The transition to dissipative sliding was typically (but not always) discontinuous. The dissipative stress was then nearly velocity-independent. The similar response of monolayers strongly attached to the solid surfaces, presenting a well-defined interface for sliding, suggests that the physical mechanism of sliding may involve wall slip.
本文研究了由分子薄液膜隔开的原子级光滑固体从静止到滑动接触的转变。这些薄膜可以几乎完全可逆地变形到膜厚的很大一部分。弹性模量和屈服应力较低，远低于块状分子晶体或玻璃。向耗散滑动的转变通常（但不总是）是不连续的。耗散应力随后几乎与速度无关。与固体表面强烈附着的单层的类似响应，为滑动提供了一个明确的界面，表明滑动的物理机制可能涉及壁滑。
