Systematic elucidation of nano-lubrication properties of ultra-thin liquid lubricant films

在高密度磁盘存储设备（硬盘驱动器）和微/纳米机器中，由于机械元件的小型化，润滑明1-nm厚的液体润滑膜已被要求。在这种超薄膜中，常规的连续理论不再有效，而应建立新的润滑理论，因为液体膜的厚度是分子尺寸的数量级。然而，新的理论还没有建立起来，其中最大的障碍之一是用传统的测量方法测量纳米滑动间隙间的润滑现象。本计画旨在发展奈米滑动间隙之量测方法及建立新的润滑技术。测量方法要求亚纳米级的精确间隙控制，亚nN高灵敏度的力测量，和观察纳米厚的滑动液体膜。在这个项目中，我们致力于开发Par和垂直-km测量，间隙测量，纳米厚润滑膜的观察，以及开发的测量方法的集成。结合开发的剪切份额和间隙测量，我们成功地测量了纳米厚的润滑膜的机械性能。我们还澄清了吸附的分子显着影响的机械性能，通过测量极性和非极性润滑油膜。此外，结合开发的剪切和垂直-坚定的测量，两个力可以同时测量.验证了观测胶片法的可行性。在有趣的是，我们将开发一种方法，可以同时测量剪切力和垂直力，油膜分布和系统地阐明纳米润滑现象。

In high-density magnetic disk storage devices (hard disk drives) and micro/nano-machines, due to miniaturization of mechanical elements, lubrication Ming 1-nm thick liquid lubricant films has been required In this ultra-thin films, the conventional continuous theory is no longer valid and a new lubrication theory should be established because the thickness of the liquid film is of the order of molecular size. However the new theory has not been established yet One of the biggest obstacle is measurement of the lubrication phenomenon between nanometer sliding gaps by using conventional measurement methods. This project aimed at developing measurement methods and establishing the new lubrication techniques for the nanometer sliding gaps. The measurement methods requires sub-nm-order precise gap control, sub-nN-high-sensitive force measurement, and observation of sliding nm-thick-liquid films. In this project, we fried to develop Par and vertical- km measurement, gap measurement, observation of nm-thick lubricant films, and integration of developed measurement methods. Combining developed shear share and gap measurements, we successfully measured mechanical properties of nm-thick lubricant films. We also clarified that adsorbed molecules significantly affect the mechanical properties by measuring polar and non-polar lubricant films. In addition, combining developed shear and vertical- firm measurements, two forces could be simultaneously measured. Moreover, feasibility of the observation film method was verified. In the funny, we will develop a method that can measure shear and vertical-forces, film distribution simultaneously and elucidate nano-lubrication phenomena systematically.