▎ 摘　　要

NOVELTY - The method for preparing a transmission electron microscope sample, comprises dispersing an amount of nano-scale specimens and an amount of graphene sheets into a solvent to achieve a dispersed solution, applying the dispersed solution on a carbon nanotube film structure of a transmission electron microscope grid, where the portion of the carbon nanotube film structure is suspended, and removing the solvent. A volume percentage of the nano-scale specimens in the dispersed solution is less than or equal to 5%. A volume percentage of the graphene sheets in the dispersed solution is less than or equal to 5%. USE - Method for preparing a transmission electron microscope sample for the examination and analysis of small materials in a powder form. ADVANTAGE - The method is capable of effectively and easily preparing the transmission electron microscope sample thus achieving higher resolution transmission electron microscopy images when the specimen is nano in scale and enabling better contrast transmission electron microscope imaging. DETAILED DESCRIPTION - The method for preparing a transmission electron microscope sample, comprises dispersing an amount of nano-scale specimens and an amount of graphene sheets into a solvent to achieve a dispersed solution, applying the dispersed solution on a carbon nanotube film structure of a transmission electron microscope grid, where the portion of the carbon nanotube film structure is suspended, and removing the solvent. A volume percentage of the nano-scale specimens in the dispersed solution is less than or equal to 5%. A volume percentage of the graphene sheets in the dispersed solution is less than or equal to 5%. The volume percentage of the graphene sheets is greater than the volume percentage of the nano-scale specimens. The transmission electron microscope grid is made by providing grid and carbon nanotube structure disposed on the grid, where the carbon nanotube structure comprises of two carbon nanotube films, and pores that are defined in the carbon nanotube film structure. The carbon nanotube film is drawn from a carbon nanotube array. The carbon nanotube films are stacked and aligned along different directions, and are aligned perpendicularly to each other. The carbon nanotube films are attached on a frame and aligned along different directions to form the carbon nanotube film structure, which is moved from the frame to cover the grid. A number of the carbon nanotube films is 2-4. The transmission electronmicroscope grid is made by applying organic solvent to the carbon nanotube film structure and removing any excess portion of the carbon nanotube film structure. The organic solvent and the dispersed solution are applied to the surface of the carbon nanotube film structure. The entire carbon nanotube film structure is immersed into a container having the organic solvent and the dispersed solution. The solvent is removed at an elevated temperature. The carbon nanotube film structure comprises pores covered by the graphene sheet. DESCRIPTION OF DRAWING(S) - The diagram shows a flow chart of a method for preparing a transmission electron microscope sample.