title: Periodically Modulated Size-Dependent Elastic Properties of Armchair Graphene Nanoribbons.
abstract: First-principles calculations were conducted on armchair graphene nanoribbons (AGNRs) to simulate the elastic behavior of AGNRs with hydrogen-terminated and bare edges. The results show width-dependent elastic properties with a periodicity of three, which depends on the nature of edge. The edge eigenstress and eigendisplacement models are able to predict the width-dependent nominal Young's modulus and Poisson's ratio, while the Clar structure explains the crucial role of edges in the periodically modulated size-dependent elastic properties.
authors.affiliation: †Corrosion and Protection Center, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: X
authors.initials: X
authors.lastname: Li
authors.affiliation: ‡Shanghai University Materials Genome Institute and Shanghai Materials Genome Institute, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Tong-Yi
authors.initials: TY
authors.lastname: Zhang
authors.affiliation: †Corrosion and Protection Center, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Su
keywords: Graphene nanoribbons; Poisson’s ratio; Young’s modulus; size-dependent