Micro grid of transmission electron microscope and preparation method thereof

A technology of transmission electron microscope and micro-grid, which is applied in the manufacture of electrode system, the manufacture of discharge tube/lamp, circuit, etc., can solve the problem of high contrast noise, thickness of amorphous carbon film, and improvement of the resolution of TEM imaging of nanoparticles. Great influence, etc., to achieve the effect of high resolution and low contrast noise

Active Publication Date: 2011-02-02
TSINGHUA UNIV
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Problems solved by technology

However, in practical applications, especially when observing high-resolution TEM images of nanoscale particles, the amorphous carbon film in the microgrid is thicker, and the contrast noise is larger, which limits the resolution of TEM imaging of nanoparticles. The improvement has a great impact

Method used

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  • Micro grid of transmission electron microscope and preparation method thereof
  • Micro grid of transmission electron microscope and preparation method thereof
  • Micro grid of transmission electron microscope and preparation method thereof

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[0019] see figure 1 , the preparation method of the transmission electron microscope microgrid according to the first embodiment of the present invention mainly includes the following steps:

[0020] Step 1, providing a carbon nanotube film structure and a graphene sheet dispersion.

[0021] The carbon nanotube film structure includes multiple cross-stacked carbon nanotube films. The carbon nanotube film is obtained by directly pulling from a carbon nanotube array, and its preparation method specifically includes the following steps:

[0022] Firstly, a carbon nanotube array formed on a growth substrate is provided, and the array is a super-aligned carbon nanotube array.

[0023] The carbon nanotube array is prepared by a chemical vapor deposition method, and the carbon nanotube array is a pure carbon nanotube array formed by a plurality of carbon nanotubes that grow parallel to each other and perpendicular to the growth substrate. By controlling the growth conditions above...

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Abstract

The invention relates to a micro grid of a transmission electron microscope, which comprises a grid and a graphene sheet-carbon nano tube film composite structure covering the grid, wherein the graphene sheet-carbon nano tube film composite structure is suspended by the grid part; and the graphene sheet-carbon nano tube film composite structure comprises at least one carbon nano tube film structure and a plurality of graphene sheets, the carbon nano tube film structure comprises a plurality of micro pores, and at least one micro pore is covered by one graphene sheet. The invention also relates to a preparation method of the micro grid of a transmission electron microscope.

Description

technical field [0001] The invention relates to a transmission electron microscope microgrid and a preparation method thereof. Background technique [0002] In transmission electron microscopy, the amorphous carbon support film (microgrid) is an important tool for carrying powder samples for high-resolution transmission electron microscopy (HRTEM) observation. With the continuous development of research on nanomaterials, the application of microgates in the field of electron microscopy characterization of nanomaterials has become increasingly widespread. In the prior art, the microgrid applied to the transmission electron microscope is usually made by covering a metal grid such as a copper grid or a nickel grid with a porous organic film, and then vapor-depositing a layer of amorphous carbon film. However, in practical applications, especially when observing high-resolution TEM images of nanoscale particles, the amorphous carbon film in the microgrid is thicker, and the con...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J37/26H01J9/00H01J37/20
CPCH01J37/20H01J2237/26Y10T428/249967
Inventor 姜开利张丽娜张昊旭范守善
Owner TSINGHUA UNIV
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