▎ 摘　　要

NOVELTY - Silver nanostructure protected by a graphene-polyvinylpyrrolidone hybrid coating comprises silver nanostructures, polyvinylpyrrolidone (PVP) layers, and graphene, where the polyvinylpyrrolidone layer is wrapped on the surface of the silver nanostructure, which is obtained when the silver nanostructure is synthesized by the polyol method using polyvinylpyrrolidone as a surfactant, transferring graphene, and forming a graphene- polyvinylpyrrolidone mixed coating on the surface of the silver nanostructure. USE - Used as silver nanostructure protected by a graphene-PVP hybrid coating. ADVANTAGE - The device: is covered with a graphene PVP protective layer; avoids contact between silver nanostructures and the external environment; realizes double protection of silver nanostructures; inhibits oxidation to the long-term stable use of silver nanostructures. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing a silver nanostructure protected by a graphene-PVP hybrid coating comprising (1) using polyvinylpyrrolidone as a surfactant, and preparing silver nanostructure with a polyvinylpyrrolidone thin layer on the surface by a polyol method, (2) washing the silver nanostructure with acetone, ethanol, and ultrapure water in order, and obtaining the purer silver nanostructure dissolved in ethanol, and stirring to obtain a uniform dispersion of silver nanostructures, (3) using acetone and isopropanol, removing impurities on the surface of the substrate, ultrasonically processing the substrate in deionized water for 3-5 minutes, dropwisely adding the uniform dispersion of the silver nanostructures, and spin coating or printing on a clean substrate surface, and (4) transferring the graphene to the surface of the substrate containing the above-mentioned silver nanostructure, drying naturally, then annealing in a mixed gas of 10% hydrogen and nitrogen at 150-200 degrees C for 3 hours. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the silver nanostructure with graphene-PVP protection layer.