利用纳米压痕简单快捷地测量石墨烯的机械性能

In this paper, we introduce an approach to simply and effectively determine the mechanical property of graphene by using an instrumented nano-indenter. The measurement was made on layered graphene sheets of thickness between 1 ~ 7 nm (less than 5 layers). The results reveal that the graphene sheets exhibit an obvious response to the instrumented nanoindentation due to its high strength and large elastic modulus. The experimental data show that the elastic modulus of a single layer graphene is 0.98TPa after correction of the substrate effect, which is coincident to the current experimental and theoretical values, and the mechanical property decreases as the number of layers increase.