▎ 摘　　要

We calculate the mechanical and electron-transport properties of graphene nanoribbons (GNRs) under uniaxial tensile strain with first-principles density functional theory. Our calculations reveal that armchair- and zigzag-shaped edges decrease and increase the tensile strength of GNR, respectively. The I-V curve for GNR with armchair edges changes drastically under tensile strain, while the influence of tensile strain on the electron-transport properties of GNR with zigzag edges is negligible. Our calculations propose one way to design and fabricate nanoscale mechanical sensors and devices based on GNRs. (c) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim