▎ 摘　　要

NOVELTY - Preparing composite surface-enhanced Raman scattering (SERS) substrate for pesticide detection, involves forming micro-nano lattice structure on the surface of the graphene-copper foil to form graphene-copper foil with indentation structure. The layer of gold film is plated on the surface of the graphene with indentation structure-copper foil to form graphene with indentation structure-gold nanoparticles-copper foil. The coating of polymethyl methacrylate solution is suspended on the indentation structure of the graphene-gold nano-particles-copper foil and dried. The corrosion treatment of the graphene-gold nano-particles-copper foil is performed to obtain graphene-gold nano-particles-polymethyl methacrylate (PMMA) film with micro-nano structure. The graphene-gold nano-particles-PMMA film is adsorbed with micro-nano structure on silicon wafer to obtain composite surface-enhanced Raman scattering (SERS) substrate. USE - Method for preparing composite surface-enhanced Raman scattering (SERS) substrate for pesticide detection. ADVANTAGE - The method combines nano-indentation, coating and chemical corrosion to prepare composite SERS substrate, realizes high-efficiency processing of large-range regular micro-nano lattice structure.