▎ 摘　　要

NOVELTY - Manufacture of chemical sensor involves generating graphene by chemical vapor deposition by increasing temperature from 800-1200 degrees C, stabilizing the graphene with a dry ice wind direction cooling device, transferring graphene on a flexible substrate, introducing a surface functional group by plasma-processing graphene transferred on the flexible substrate, and forming metal nanoparticles by using ultrasonic waves and manufacturing a nanocomposite by attaching the surface functional group to the metal nanoparticles through a coordinate bonding method. USE - Manufacture of chemical sensor is used for detecting low-concentration hydrogen (claimed). ADVANTAGE - The method efficiently and economically provides high-sensitivity flexible chemical sensor which detects low-concentration hydrogen at room temperature in a short time.