▎ 摘　　要

NOVELTY - Preparing high stability liquid gate type graphene field effect transistor involves performing hydrophobic treatment of the substrate, growing graphene by vapor deposition, transferring the graphene onto the substrate, drying, degumming, cleaning, removing impurity, setting a reaction tank above the substrate, pasting the reaction tank on top of the graphene to form a graphene field effect transistor with a reaction tank, and curing the graphene field effect transistor equipped with a reaction tank in an ultraviolet box. USE - Method for preparing high stability liquid gate type graphene field effect transistor used for detecting nucleic acid molecule (claimed). ADVANTAGE - The method uses n-octadecyltrichlorosilane (OTS) to self-assemble on a glass substrate to form a hydrophobic film, which effectively prevents the liquid in the solution environment from diffusing from the graphene surface to between the graphene and the substrate, and overcomes the problem of water film formation.