▎ 摘　　要

We numerically studied the effect of size and shape of graphene sheets on nanoscale peeling characteristics by atomic force microscopy (AFM). It was clarified that the simulated peeling processes of the graphene sheet connected to the cantilever spring of AFM were classified into typical four types of the peeling force curves. This classification of the peeling process could be clearly understood in the phase diagram plotted as a function of the length and width of the peeled graphene sheet. (C) 2019 The Japan Society of Applied Physics