Surface hydrogenation regulated wrinkling and torque capability of hydrogenated graphene annulus under circular shearing.

ABSTRACT: Wrinkles as intrinsic topological feature have been expected to affect the electrical and mechanical properties of atomically thin graphene. Molecular dynamics simulations are adopted to investigate the wrinkling characteristics in hydrogenated graphene annulus under circular shearing at the inner edge. The amplitude of wrinkles induced by in-plane rotation around the inner edge is sensitive to hydrogenation, and increases quadratically with hydrogen coverage. The effect of hydrogenation on mechanical properties is investigated by calculating the torque capability of annular graphene with varying hydrogen coverage and inner radius. Hydrogenation-enhanced wrinkles cause the aggregation of carbon atoms towards the inner edge and contribute to the critical torque strength of annulus. Based on

SUBMITTER: Li Y 

PROVIDER: S-EPMC4642312 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature