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Carbon nanotube field emitter and preparation method thereof

A carbon nanotube and field emitter technology, which is applied in nanotechnology, chemical instruments and methods, and the manufacture of discharge tubes/lamps, etc., can solve the problems of poor stability, short life and poor bonding force of carbon nanotube field emitters. , to achieve the effect of improving emission efficiency and service life, improving stability and service life

Active Publication Date: 2022-03-22
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the poor bonding force between the carbon nanotube array grown directly on the cathode substrate and the cathode substrate, and the carbon nanotubes in the carbon nanotube array have growth defects, the resulting carbon nanotube field emitter has poor stability and short life.

Method used

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  • Carbon nanotube field emitter and preparation method thereof
  • Carbon nanotube field emitter and preparation method thereof

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Embodiment Construction

[0020] The carbon nanotube field emitter provided by the present invention and the preparation method thereof will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] See figure 1 , the present invention provides a preparation method of a carbon nanotube field emitter, which comprises the following steps:

[0022] S1, providing a carbon nanotube array;

[0023] S2, heat-treating the carbon nanotube array to form a graphitized carbon nanotube array;

[0024] S3, providing a cathode substrate, and forming a conductive adhesive layer on the surface of the cathode substrate;

[0025] S4, contacting one end of the graphitized carbon nanotube array with the conductive adhesive layer, and curing the conductive adhesive layer, so that the graphitized carbon nanotube array is fixed on the cathode substrate .

[0026] In step S1, the carbon nanotube array is formed on a growth substrate, and the array is preferably a su...

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Abstract

The invention relates to a method for preparing a carbon nanotube field emitter, comprising the following steps: providing a carbon nanotube array; heat-treating the carbon nanotube array to form a graphitized carbon nanotube array; providing a cathode substrate, on the cathode A conductive adhesive layer is formed on the surface of the substrate; one end of the graphitized carbon nanotube array is contacted with the conductive adhesive layer, and the conductive adhesive layer is cured, so that the graphitized carbon nanotubes An array is fixed on the cathode substrate. In addition, the invention also relates to a carbon nanotube field emitter.

Description

technical field [0001] The invention relates to a field emitter, in particular to a carbon nanotube field emitter and a preparation method thereof. Background technique [0002] Since the early 1990s, nanomaterials represented by carbon nanotubes have attracted great attention due to their unique structures and properties. In recent years, with the deepening of research on carbon nanotubes and nanomaterials, their broad application prospects are constantly emerging. For example, due to the unique electromagnetic, optical, mechanical, chemical and other properties of carbon nanotubes, a large number of researches on their application in field emission electron sources, sensors, new optical materials, soft ferromagnetic materials and other fields have been reported continuously. [0003] Taking field emission technology as an example, a carbon nanotube field emitter generally includes a cathode substrate and a carbon nanotube layer as an emission material formed on the cathod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/02H01J1/304
CPCH01J1/304H01J9/025H01J1/3042B82Y40/00B32B7/12B32B9/007B32B37/1284B32B2457/00B32B38/0004B32B38/0008B32B2250/02B32B2255/00B32B2313/04B32B3/30
Inventor 柳鹏周段亮张春海潜力王昱权郭雪伟马丽永王福军范守善
Owner TSINGHUA UNIV