▎ 摘　　要

NOVELTY - Preparing graphene oxide film involves floating graphene oxide film on substrate liquid with thickness of not greater than 100 nanometer, and evaporating substrate liquid to obtain highly wrinkled graphene oxide film. USE - Method for preparing graphene oxide film for humidity detection (claimed). ADVANTAGE - The method enables to prepare graphene oxide film that has good transparency, excellent gas absorption of gas penetrability, and improves drape film sensitivity to humidity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for using graphene oxide film, which involves dropping base liquid on surface of electrode, floating graphene oxide film on base liquid, and evaporating base liquid to obtain surface of electrode.