▎ 摘　　要

NOVELTY - The sensor (4) has a glass substrate, a silver layer, a vanadium dioxide layer, a molybdenum disulfide layer, a graphene layer and a micro cavity in order from bottom to top. The micro chamber is communicated with a sample inlet pipeline and a sample outlet pipeline. The glass substrate is a chalcogenide glass. USE - Surface plasma resonance (SPR) sensor for use with adjustable gas and liquid sensing device (claimed) used in biological, environmental, and medical fields based on vanadium dioxide. ADVANTAGE - The 2S2G glass substrate is adopted to improve the detection accuracy of the device, the phase change characteristics of vanadium dioxide material are used to achieve the switching between gas detection and liquid detection, and molybdenum disulfide and graphene are used to improve the resolution of the device. The structure is simple, easy to control and adjust. It can be widely used in biological, environmental, medical and other fields. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a adjustable gas and liquid sensing device based on vanadium dioxide. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the gas and liquid sensing device based on graphene molybdenum disulfide vanadium dioxide. He ne laser (1) First lens (2) Polaroid (3) Surface plasma resonance sensor (4) Detector (6) Computer (7)