▎ 摘　　要

We investigate the structural and electronic properties of the single-side fluorinated graphene C4F supercell under equibiaxial strains via first-principles calculations. The results show that, the fluorinated and non-fluorinated C atoms (C-A and C-B) have two C-C bonds (C-A-C-B and C-B-C-B) whose lengths decrease (increase) with increasing equibiaxial compressive (tensile) strain. Due to adsorption of F on C-A, the bond angle of three adjacent C atoms C-B-C-A-C-B is always smaller than C-A-C-B-C-B under the same strain. The unstrained C4F supercell exhibits a direct band gap and undergoes the direct-to-indirect transition by applying equibiaxial compressive strains. While the band gap of C4F supercell increases slightly with the increasing equibiaxial tensile strain. (C) 2013 Elsevier B.V. All rights reserved.