▎ 摘　　要

NOVELTY - Surface-enhanced Raman scattering composite substrate modified with thiol and graphene includes a substrate, silver nanowires attached to the substrate, a graphene layer, gold nanospheres, and thiols modified on the graphene layer and gold nanospheres. USE - Surface-enhanced Raman scattering composite substrate modified with thiol and graphene for detection of hydrophobic molecules, especially in the detection of polycyclic aromatic hydrocarbons (cliamed). ADVANTAGE - The surface-enhanced Raman scattering composite substrate modified with thiol and graphene has high detection sensitivity to substances (such as organic pollutants), and preparation method is self-assembled through solution volatilization, is simple and fast, does not involve expensive instruments, and the substrate is solid, which is convenient for storage and operation, and is convenient for further popularization and application. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: 1. a method for preparing a surface-enhanced Raman scattering composite substrate modified by thiol and graphene, which involves attaching silver nanowires, graphene layers, and gold nanospheres on the surface of a substrate to obtain an active substrate, and modifying the active substrate with thiol to obtain a surface-enhanced Raman scattering composite substrate modified with thiol and graphene; and 2. a composite substrate used in the detection of hydrophobic molecules, especially in the detection of polycyclic aromatic hydrocarbons.