▎ 摘　　要

NOVELTY - Nickel disulfide (NiS2) enhanced graphene-based surface-enhanced Raman scattering (SERS) device comprises M-NiS2/NiS-graphene specific structure, where M is a precious metal nano-layer, NiS2/NiS is an alternating NiS2 and NiS nano-multilayer structure. USE - Used as NiS2 enhanced graphene-based SERS device. ADVANTAGE - The device increases detection sensitivity, can achieve Raman enhancement under a variety of excitation wavelengths, and broaden its Raman analysis application range. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing NiS2 enhanced graphene-based SERS device, comprising (i) using polystyrene colloidal sphere template as substrate, chemical vapor deposition of graphene layer on its surface; (ii) depositing alternate NiS2 and NiS nano-multilayer structures on the surface of the graphene layer by atomic layer; and (iii) magnetron sputtering precious metal nano-layers on the surface of alternating NiS2 and NiS nano-multilayer structures.