▎ 摘　　要

NOVELTY - A gas sensor array comprises a substrate and a set of resistive gas sensors formed on the substrate, where the respective gas sensors in the array comprises a patterned graphene film disposed on substrate and a polymer film overlying the graphene film, the substrate has patterned array of metal electrodes, the metal electrode array constitus a conductive lead of each gas-sensitive resistor, each of the film type and/or film thickness of the polymer film of the gas sensor is different. USE - Gas sensor array for detecting the presence of parts per billion grade volatile organic compounds. ADVANTAGE - The sensor array detects the presence of parts per billion grade volatile organic compounds with high sensitivity and selectivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing gas sensor array.