▎ 摘　　要

NOVELTY - The device has a support unit that is provided with a channel. One end of the channel is connected to the back of the copper mesh, and the other end is connected to the solvent absorption unit. The front side of the copper mesh is loaded with powder sample dispersion. The solvent absorption unit is used to generate negative pressure to separate the solvent and the powder sample in the powder sample dispersion. USE - Device for preparing powder samples for transmission electron microscopy such as graphene, molybdenum disulfide and two-dimensional material used in chemical and material field. ADVANTAGE - The solvent in the powder sample is rapidly reduced. The solvent content is greatly reduced. The time of subsequent baking is shortened. The efficiency and success rate of preparing powder samples are improved. The copper mesh is fixed in the vertical direction by means of vacuum suction, and relying on the limit top cover to fix the copper mesh in the horizontal direction. The problem of the copper mesh turning over during the pipetting process is avoided. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the device for preparing powder samples for transmission electron microscopy. Pad (0) Sample base (1) Air suction joint (2) Limiting top cover (3)