论文摘要
Over the past twenty years, thin film lubrication（TFL） theory has been used to characterize the molecular behaviors in lubrication films thinner than 100 nm, effectively bridging the gap between elastohydrodynamic lubrication and boundary lubrication. Unfortunately, to date, the TFL molecular model proposed in 1996 has not been directly proven by experimental detection. Herein, a method based on surface-enhanced Raman spectroscopy was developed to show both the packing and orienting of liquid molecules in the TFL regime. By trapping liquid crystal molecules between a structured silver surface and a glass surface, molecular ordering states dominated by shear effect and surface effect were successfully distinguished. A nanosandwich structure consisting of an adsorbed layer, an ordered-molecule layer, and a fluid layer was demonstrated. Molecule imaging in TFL was achieved. Our results illustrate the molecular behaviors and lubrication mechanism in nanoconfined films and facilitate the lubrication design of nanoelectromechanical and microelectromechanical systems.
论文目录
文章来源
类型: 期刊论文
作者: Ming GAO,Haoyu LI,Liran MA,Yuan GAO,Linwei MA,Jianbin LUO
来源: Friction 2019年05期
年度: 2019
分类: 工程科技Ⅱ辑
专业: 机械工业
单位: State Key Laboratory of Tribology, Tsinghua University,School of Metallurgy Engineering, Xi'an University of Architecture and Technology,School of Materials Science and Engineering, Tsinghua University
基金: financially supported by the National Natural Science Foundation of China(51305225,51527901)
分类号: TH117
页码: 479-488
总页数: 10
文件大小: 17771K
下载量: 11