Tshiprut Z, Filippov A E, Urbakh M
School of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel.
Phys Rev Lett. 2005 Jul 1;95(1):016101. doi: 10.1103/PhysRevLett.95.016101. Epub 2005 Jun 29.
We demonstrate that lateral vibrations of a substrate can dramatically increase surface diffusivity and mobility and reduce friction at the nanoscale. Dilatancy is shown to play an essential role in the dynamics of a nanometer-size tip which interacts with a vibrating surface. We find an abrupt dilatancy transition from the state with a small tip-surface separation to the state with a large separation as the vibration frequency increases. Atomic force microscopy experiments are suggested which can test the predicted effects.
我们证明，基底的横向振动可显著提高表面扩散率和迁移率，并降低纳米尺度下的摩擦力。实验表明，剪胀在与振动表面相互作用的纳米尺寸尖端的动力学中起着至关重要的作用。我们发现，随着振动频率的增加，会出现从尖端与表面间距较小的状态到间距较大的状态的突然剪胀转变。本文提出了原子力显微镜实验，可用于检验预测的效应。
