Friction law at the nanoscale: on a nanopatterned silicon surface Jiapeng Sun1, Jing Han2

• 作 者: Jiapeng Sun Jing Han
• 机 构: College of Mechanics and Materials, Hohai University, Nanjing 210098, Jiangsu Province, PR China
• 出 处: 第十一届全国表面工程大会暨第八届全国青年表面工程学术会议
• 发表日期: 2016年4期
• 关键词: Friction Nanotribology Friction law Molecular dynamics Nanopattern

　　A molecule dyn mics simulation is performed to investigate the friction behavior of the nanopatterned silicon surface with periodical rectangle groove array in nanoscale single asperity contacts. It is well known that the classical Amontons law breaks down for dry nanoscale single asperity contact with a strong adhesion. But the result shows that classical Amontons law still holds for the nanopatterned surface in dry and wearless nanoscale single asperity contacts even with a high adhesion force, i.e. the friction force varies linearly with the normal load. We can now understand both adhesion reduction and adding nanopattern can bring a transition from a sublinear to linear friction at the nanoscale. The relationship between the friction force and real contact area and the contact state are also discussed in detailed. The present results reveal that the nanopattern is useful approach to control the friction behavior at the nanoscale.