Load dependence of the periodicity in friction force images on the NaF(100) surface
Load dependence of the periodicity in friction force images on the NaF(100) surface
复制标题
NaF(100) 表面摩擦力图像周期性的载荷依赖性
DOI：
10.1080/01418619608239732
复制
发表时间：
1996
影响因子：
1.6
通讯作者：
S. Morita
中科院分区：
文献类型：
--
作者：
S. Fujisawa;Y. Sugawara;S. Morita
摘要利用二维摩擦力显微镜在原子尺度上研究了NaF（100）表面与Si3N4表面粗糙体之间摩擦力的载荷依赖性。结果发现，摩擦图像的周期性随载荷的变化而变化。在低于1.9nN的正常载荷下，观察到NaF表面的通常晶格周期性。另一方面，在1.9和2.8 nN之间的正常负载下，首次观察到晶格周期一半的异常周期性。在3.1和3.3 nN之间的正常负载下，再次观察到通常的晶格周期性。这种周期性的负载依赖性与Tang、Joachim、Devillers和吉拉德的计算机模拟预测一致。最后，在正常载荷3.6nN以上，周期性消失。
Abstract We investigated load dependence of the frictional force between a NaF(100) surface and a Si3N4 asperity on an atomic scale using a two-dimensional frictional force microscope. As a result, we found that the periodicity in the frictional image changes with the load. Below the normal load of 1·9nN, the usual lattice periodicity of the NaF surface is observed. On the other hand, at the normal load between 1·9 and 2·8 nN, an anomalous periodicity of half the lattice periodicity is observed for the first time. At the normal load between 3·1 and 3·3 nN, the usual lattice periodicity is again observed. This load dependence of the periodicity consistent with the prediction of the computer simulation by Tang, Joachim, Devillers and Girard. Finally, above the normal load of 3·6 nN, the periodicity disappeared.