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Graphene sheet-carbon nanotube film composite structure and preparation method thereof

A carbon nanotube film and graphene sheet technology is applied in the field of graphene sheet-carbon nanotube film composite structure and preparation thereof, and can solve the problem of large contrast noise, amorphous carbon film thickness, and transmission electron microscope imaging resolution of nanoparticles. The improvement of the ratio has a great impact on the problems, so as to achieve the effect of small contrast noise.

Active Publication Date: 2011-02-02
TSINGHUA UNIV +1
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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

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  • Graphene sheet-carbon nanotube film composite structure and preparation method thereof
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  • Graphene sheet-carbon nanotube film composite structure and preparation method thereof

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no. 1 example

[0017] 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:

[0018] Step 1, providing a carbon nanotube film structure and a graphene sheet dispersion.

[0019] 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:

[0020] Firstly, a carbon nanotube array formed on a growth substrate is provided, and the array is a super-aligned carbon nanotube array.

[0021] 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 graphene sheet-carbon nanotube film composite structure which comprises at least one carbon nanotube film structure and a plurality of graphene sheets, wherein the carbon nanotube film structure comprises a plurality of micropores, wherein at least one micropore is covered by one graphene sheet. The invention also relates to a preparation method of the graphene sheet-carbon nanotube film composite structure.

Description

[0001] This case is a divisional application filed by the applicant on July 24, 2009 with the application number 200910109128.0 and the name "Microgrid for Transmission Electron Microscopy and Its Preparation Method". technical field [0002] The invention relates to a graphene sheet-carbon nanotube film composite structure and a preparation method thereof. Background technique [0003] 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 the...

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Application Information

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