Figure 7
From: Constructing a three-dimensional graphene structure via bonding layers by ion beam irradiation

(a) Image of pores created with different diameters on a five-layer stack of graphene sheets. (inset) Tension contour image at the point of ultimate tensile strength associated with each configuration. (b) The diagram of the strain-stress tests in x vector direction for the configurations shown in (a). The solid curve is the test on the graphene stack with a 0.5 nm pore, the dashed curve is the test on the graphene stack with a 1.0 nm pore, and the dotted line is the test on the graphene stack with a 1.5 nm pore.