▎ 摘　　要

NOVELTY - Covalent modification of single-layer graphene comprises forming graphene on a substrate, adding polymethyl methacrylate solution to a surface of single layer modified graphene and then heating and curing to form polymethyl methacrylate film, etching the substrate using hydrofluoric acid aqueous solution, forming the polymethyl methacrylate film on a protective substrate, performing covalent chemical modification on the modified graphene to realize that the graphene is non-uniform, transferring the non-uniform graphene to other surface of the substrate, and removing the film. USE - The method is useful for covalent modification of single-layer graphene (claimed).