▎ 摘　　要

NOVELTY - Preparing silver nano graphene oxide composite nano material involves preparing graphene oxide solution by using modified Hummers method, adding graphene oxide solution to a volume ratio of 10 wt.% of 200 milliliter in a nitric acid solution. The mixture is condensed and refluxed at 80 degrees C for 24 hours, then centrifuged with deionized water, and the resulting solution is sonicated for 5-6 hours, and filtered through a filter to obtain a nano graphene oxide solution in an ice bath under conditions, and treated in 10 milliliter nano graphene oxide solution with the concentration of 0.5-10 milliliter of silver nitrate solution with concentration of 0.02 molar which are mixed and stirred, and 10 milliliter of a 20 millimole sodium borohydride solution which is uniformillilitery injected at a rate of 500 micro liter per minute by syringe pump until solution is light gray, after turning bright yellow. USE - Method for preparing silver nano graphene oxide composite nano material. ADVANTAGE - The method enables to preparing silver nano graphene oxide composite nano material which is cost-effective, convenient and it is effective detecting tool. DETAILED DESCRIPTION - The reaction is turned off, and resulting solution is centrifuged with deionized water to obtain desired product. An INDEPENDENT CLAIM is included for a method for paper-based surface enhanced raman scattering chip, which involves printing silver nano graphene oxide composite nano material on a filter paper by using screen printing machine to form desired product.