Yan Yuping, Lv Jiajiang, Liu Sheng
School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, People's Republic of China.
Nanotechnology. 2018 Apr 20;29(16):165703. doi: 10.1088/1361-6528/aaaced.
We investigate chirality and grain boundary (GB) effects on indentation mechanical properties of graphene coated on nickel foil using molecular dynamics simulations. The models of graphene with different chirality angles, different numbers of layers and tilt GBs were established. It was found that the chirality angle of few-layer graphene had a significant effect on the load bearing capacity of graphene/nickel systems, and this turns out to be more significant when the number of layers is greater than one. The enhancement to the contact stiffness, elastic capacity and the load bearing capacity of graphene with tilt GBs was lower than that of pristine graphene.
我们使用分子动力学模拟研究了手性和晶界（GB）对涂覆在镍箔上的石墨烯压痕力学性能的影响。建立了具有不同手性角、不同层数和倾斜晶界的石墨烯模型。研究发现，少层石墨烯的手性角对石墨烯/镍系统的承载能力有显著影响，并且当层数大于一层时，这种影响更为显著。具有倾斜晶界的石墨烯对接触刚度、弹性能力和承载能力的增强作用低于原始石墨烯。
