▎ 摘　　要

NOVELTY - In-situ characterization of nano-bubble in liquid environment comprises (1) selecting the transmitted electrical mirror metal load, (2) depositing graphene thin film on metal carrying net to obtain graphene carrying net, (3) plating a layer of metal film on surface of graphene carrier net, (4) heating the metal film, melting and cooling, (5) placing graphene carrier net containing metal nano-particles into plasma surface treatment instrument to perform surface modification, (6) dropping 1-5 l aqueous solution on graphene carrier net, (7) covering another graphene film that has been treated with graphene loaded mesh with titer graphene loading network with aqueous solution, (8) placing graphene liquid pool into a vacuum leak detection system, placing in transmission electron microscope, opening the electron gun switch, and electron beam interacts with aqueous solution, and (9) irradiating the nano bubble by electron beam continuously to original position characterization. USE - In-situ characterization of nano-bubble in liquid environment useful in mineral flotation, ultrasonic imaging and sewage treatment. ADVANTAGE - The method has high time and space resolution.