▎ 摘　　要

Molecular dynamics simulation is used to investigate the properties of the curved and planar monolayer graphene nanoribbons (GNRs) under boundary confinement. The wrinkles are formed in curved-armchair GNRs not in curved-zigzag GNRs. With temperatures of 300-900 K and curvature radii of 3-6 nip, the wavelength of wrinkles did not change obviously. In nanoindentation tests, the zigzag graphene comparing to the armchair graphene had the larger contact stiffness about 50%. Further the concave graphene comparing to the convex graphene showed the higher contact stiffness due to its higher Young's modulus. (C) 2015 Elsevier Ltd. All rights reserved.