▎ 摘　　要

NOVELTY - This utility new type relates to one based on local surface plasma resonance of graphene molecular sensor, comprising a light source system, a transparent metal nano-particle thin film system, graphene molecular adsorption system, detecting system. When the rear molecular adsorption on the surface of graphite alkene, carrier concentration and dielectric constant of graphene in the change, so as to affect local surface plasma resonance frequency of transparent metal nano-particle thin film system so as to detect process for the type and concentration of molecule. The sensor preparation process is very simple, the cost is low, operation is convenient, and the graphene can effectively prevent metal corrosion and passivation, ensure the service life of system, but also can prevent the metal and contact of toxicity caused by or related to the chemical reaction, system of good stability, high sensitivity.