Nanoprobe Laboratory for Bio- & Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 W. 19th Avenue, Columbus, Ohio 43210-1142, USA.
Beilstein J Nanotechnol. 2012;3:759-72. doi: 10.3762/bjnano.3.85. Epub 2012 Nov 15.
Nano-object additives are used in tribological applications as well as in various applications in liquids requiring controlled manipulation and targeting. On the macroscale, nanoparticles in solids and liquids have been shown to reduce friction and wear. On the nanoscale, atomic force microscopy (AFM) studies have been performed in single- and multiple-nanoparticle contact, in dry environments, to characterize friction forces and wear. However, limited studies in submerged liquid environments have been performed and further studies are needed. In this paper, spherical Au nanoparticles were studied for their effect on friction and wear under dry conditions and submerged in water. In single-nanoparticle contact, individual nanoparticles, deposited on silicon, were manipulated with a sharp tip and the friction force was determined. Multiple-nanoparticle contact sliding experiments were performed on nanoparticle-coated silicon with a glass sphere. Wear tests were performed on the nanoscale with AFM as well as on the macroscale by using a ball-on-flat tribometer to relate friction and wear reduction on the nanoscale and macroscale. Results indicate that the addition of Au nanoparticles reduces friction and wear.
纳米物体添加剂在摩擦学应用以及在需要控制操作和靶向的各种液体应用中被使用。在宏观尺度上，已经表明固体和液体中的纳米颗粒可以减少摩擦和磨损。在纳米尺度上，已经在干燥环境中进行了原子力显微镜（AFM）研究，以表征摩擦力和磨损。然而，在水下液体环境中的研究有限，需要进一步研究。本文研究了球形 Au 纳米颗粒在干燥条件下和浸没在水中时对摩擦和磨损的影响。在单纳米颗粒接触中，用尖锐的尖端操纵沉积在硅上的单个纳米颗粒，并确定摩擦力。在涂有纳米颗粒的硅上用玻璃球进行了多纳米颗粒接触滑动实验。纳米尺度的磨损试验与宏观尺度的磨损试验都是通过使用球盘摩擦试验机进行的，以将纳米尺度和宏观尺度的摩擦和磨损减少联系起来。结果表明，添加 Au 纳米颗粒可以减少摩擦和磨损。
