▎ 摘　　要

NOVELTY - The improvement of graphene transfer of copper foil substrate involves cleaning graphene sample of copper foil substrate, vacuum drying, preparing polymethylmethacrylate solution, and coating polymethylmethacrylate solution on copper foil substrate graphene to form copper foil substrate graphene composite layer, heat-treating, and cooling to form support on a surface of copper foil substrate graphene, placing the composite layer in diluted hydrochloric acid, and etching to remove copper foil substrate to obtain polymethylmethacrylate-based substrate graphene. USE - Improvement of graphene transfer of copper foil substrate. ADVANTAGE - The method enables improvement of copper foil substrate graphene transfer with reduced defects of wrinkles and crack, enhanced hydrophilicity, and greatly improved quality. DETAILED DESCRIPTION - The improvement of graphene transfer of copper foil substrate involves (A) cleaning the prepared graphene sample of copper foil substrate with deionized water, and vacuum drying, (B) preparing polymethylmethacrylate solution, and uniformly coating the polymethylmethacrylate solution on the copper foil substrate graphene using a spin coater to form copper foil substrate graphene composite layer, (C) heat-treating the copper foil substrate graphene composite layer, and cooling to form support on a surface of copper foil substrate graphene, (D) placing the copper foil substrate graphene composite layer in the step (C) in diluted hydrochloric acid, etching to remove the copper foil substrate to obtain polymethylmethacrylate-based substrate graphene, and washing with deionized water, (E) placing the polymethylmethacrylate-based substrate graphene in the step (D) on a silicon chip, and heat-treating the silicon chip to form polymethylmethacrylate-based graphene composite layer, and (F) soaking the polymethylmethacrylate-based graphene composite layer obtained in the step (E) in acetone to remove polymethylmethacrylate substrate, cleaning with deionized water, heating, and drying.