Palacio Manuel, Bhushan Bharat
Nanoprobe Laboratory for Bio- and Nanotechnology and Biomimetics, The Ohio State University, 201 W 19th Avenue, Columbus, OH 43210, USA.
Nanotechnology. 2008 Aug 6;19(31):315710. doi: 10.1088/0957-4484/19/31/315710. Epub 2008 Jun 24.
Future micro/nanodevices will contain very small features such that liquid lubrication is not practical and inherent lubricity is needed. In this study, a nanoscale friction investigation was carried out during the manipulation of Au and SiO(2) nanoparticles on silicon using atomic force microscopy (AFM). Nanoparticle sliding was characterized by quantifying the lateral force associated with the AFM tip twisting as it hits the particle edge. The friction force varies with particle area and humidity, illustrating how meniscus forces on nanoparticles affect friction. A large tip slid on the nanoparticle-coated surface exhibited friction reduction due to nanoparticle sliding and contact area reduction.
未来的微纳器件将具有非常小的特征，以至于液体润滑不实用，需要固有的润滑性。在本研究中，使用原子力显微镜（AFM）对硅上的金和二氧化硅（SiO₂）纳米颗粒进行操作时，开展了纳米尺度的摩擦研究。通过量化与AFM针尖撞击颗粒边缘时扭转相关的横向力来表征纳米颗粒的滑动。摩擦力随颗粒面积和湿度而变化，说明了纳米颗粒上的弯月面力如何影响摩擦。在涂覆有纳米颗粒的表面上滑动的大针尖由于纳米颗粒的滑动和接触面积的减小而表现出摩擦力降低。
