De-wetting of lubricants on hard disks
De-wetting of lubricants on hard disks
复制标题
硬盘上润滑剂的去湿
DOI：
10.1063/1.480868
复制
发表时间：
2000
影响因子：
4.4
通讯作者：
Bruno Marchon
中科院分区：
文献类型：
--
作者：
Lei Xu;D. Ogletree;M. Salmeron;Huan Tang;J. Gui;Bruno Marchon
用扫描偏光显微镜（SPFM）和椭圆偏振仪在分子尺度上研究了Zdol型润滑剂在硬盘上的去湿过程。发现当初始润滑剂层厚于一个单层（厚）时，脱湿发生数小时至数天。对于Zdol-TX和Z-Tetraol，发现去湿以分层的方式发生，弱结合的第二层附着到液滴中，然而，对于Zdol，在去湿期间没有看到分层，只有液滴。液滴最终生长到可以通过光学显微镜观察到的程度。在所有情况下，第一个单层保持与表面结合。虽然原子力显微镜（AFM）的针尖可以很容易地穿透第一层，但它并没有去除它。
The de-wetting process of Zdol-type lubricants on hard disks has been studied at the molecular scale with scanning polarization force microscopy (SPFM) and ellipsometry. It was found that de-wetting occurred over hours to days when the initial lubricant layer was thicker than one monolayer (∼20 A thick). De-wetting was found to take place in a layered fashion for Zdol-TX and Z-Tetraol, with weakly bound second layers accreting into droplets, however, no layering was seen for Zdol during de-wetting, only droplets. The droplets eventually grew to the point where they could be observed by optical microscopy. In all cases, the first monolayer remained bound to the surface. Although the atomic force microscopy (AFM) tip could easily penetrate this first layer, it did not remove it.