▎ 摘　　要

NOVELTY - A screen printing-based graphene site effect transistor biochemical sensor comprises a source electrode, a drain electrode, an insulation protection layer, a silver/silver chloride foil, polyethylene terephthalate bottom insulation film, carboxylated graphene film, electric conductive silver paste-printed polyethylene terephthalate insulation film, pressure welding pad and contact window, where the carboxylated graphene film, the source electrode, the drain electrode and insulation protection layer are provided on the surface of the PET bottom insulation film. USE - Screen printing-based graphene site effect transistor biochemical sensor. ADVANTAGE - The sensor has increased stability, and can be manufactured with simple structure and reduced cost. DETAILED DESCRIPTION - A screen printing-based graphene site effect transistor biochemical sensor comprises a source electrode, a drain electrode, an insulation protection layer, a silver/silver chloride foil, polyethylene terephthalate bottom insulation film, carboxylated graphene film, electric conductive silver paste-printed polyethylene terephthalate insulation film, pressure welding pad and contact window, where the carboxylated graphene film, the source electrode, the drain electrode and insulation protection layer are provided on the surface of the PET bottom insulation film, the source and drain electrodes are provided on two sides of discrete carboxylated graphene film, the insulation protection layer are respectively connected to the upper surface of the source and drain electrodes, and the silver/silver chloride foil is provided on the upper surface of the carboxylated graphene film, the silver/silver chloride foil is provided on a surface of electric conductive silver paste-printed polyethylene terephthalate insulation film, and one side of the silver/silver chloride foil is provided with the insulation protection layer.