▎ 摘　　要

NOVELTY - A surface enhanced Raman scattering substrate preparing method involves preparing graphene oxide suspension, preparing a mono-disperse nano-silver sol, and taking amino protonated quartz substrate surface with a positive charge, which is fixed on a pulling machine, and impregnated in the graphene oxide suspension. The substrate is allowed to stand and dried to obtain graphene oxide super-thin film substrate. The substrate is impregnated in the mono-disperse nano-silver and dried to obtain silver nanoparticles/graphene oxide composite thin film. USE - Method for preparing surface enhanced Raman scattering substrate. ADVANTAGE - The method enables preparing surface enhanced Raman scattering substrate with high stability. DETAILED DESCRIPTION - A surface enhanced Raman scattering substrate preparing method involves preparing graphene oxide suspension, preparing a mono-disperse nano-silver sol, and taking amino protonated quartz substrate surface with a positive charge. The amino protonated quartz substrate surface with a positive charge is fixed on a pulling machine at a rate of 10 mm s-1, impregnated in the graphene oxide suspension for 2 minutes. The rate is raised. The substrate is allowed to stand for 2 minutes and dried with micro-fluidic nitrogen and repeated for 2-5 times to obtain graphene oxide super-thin film substrate. The substrate is impregnated in the mono-disperse nano-silver at a pulling speed of 10 mm s-1 and dried with micro-fluidic nitrogen to obtain silver nanoparticles/graphene oxide composite thin film. The composite thin film is placed in a tubular furnace, followed by introducing argon and hydrogen mixed gas, raising the temperature to 500-1100 degrees C, and natural cooling for 2 hours to obtain silver nanoparticles/graphene oxide composite film. The obtained film is impregnated in the graphene oxide suspension liquid at a pulling speed of 10 mm s-1, and dried with nitrogen. The resultant film is impregnated in the graphene oxide suspension liquid at a pulling speed of 10 mm s-1 for 2 minutes and dried with nitrogen. The temperature is raised to 500-1100 degrees C and naturally cooled for 2 hours to obtain a finished product.