Atomic-Scale Control of Friction and Energy Dissipation of Carbon and Silicon Nanocontacts

摘要

Atomic-scale control of friction appeared at the shear process of nanocarbon and nanosilicon interfaces is reported based on molecular simulation and experiment. First the mechanism of superlubricity of (graphene)_n/C_(60)/(graphene)_n interface (n=1,2) is studied using molecular mechanics simulation. The maximum static friction force becomes the smallest for the slip appeared at the C_(60)/graphene interface. Next the shear fracture process of MEMS opposing Si tips is studied using molecular dynamics simulation. Simulated behaviors of the Si nanojunction during the shear fracture process reproduce experimental results very well.