▎ 摘　　要

NOVELTY - The graphene gas sensor (100) includes a graphene element molecularly doped with nitrogen dioxide (NO2), a pair of voltage electrodes spaced apart on the graphene element, and a pair of current electrodes at each end of the graphene element. The graphene element is used to detect ammonia (NH3) based on a conductivity of the graphene element measured using the pair of voltage electrodes and the pair of current electrodes. A change in the conductivity upon exposure to NH3 is greater for the graphene element doped with NO2 than an undoped graphene element. USE - Graphene gas sensor for detecting ammonia gas. ADVANTAGE - Enhanced sensitivity of graphene gas sensors using molecular doping may provide high sensitivity, low response time, low-power room temperature operation, and ease of electronic integration, such as with wireless interfaces. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method of detecting ammonia gas. DESCRIPTION OF DRAWING(S) - The drawing is a perspective view which illustrates selected components of a graphene gas sensor for enhanced sensitivity using molecular doping. Graphene gas sensor (100) Graphene channel (102)