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A flexible composite material of graphene sheet-carbon nanotube film and its preparation method and application

A carbon nanotube film and graphene sheet technology, applied in the field of preparation and application of nanomaterials, can solve problems such as not being discovered, and achieve the effects of small current fluctuation and good field emission stability

Inactive Publication Date: 2017-07-07
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research on flexible substrate field emitters, such as graphene / carbon nanotube composite materials and ZnO nanowire / graphene composite materials, graphene is only used as a flexible substrate with excellent electrical conductivity and foldability. use, the advantage of its sharp edge as a highly efficient field emission point has not been exploited

Method used

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  • A flexible composite material of graphene sheet-carbon nanotube film and its preparation method and application
  • A flexible composite material of graphene sheet-carbon nanotube film and its preparation method and application
  • A flexible composite material of graphene sheet-carbon nanotube film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Heat treatment of carbon nanotube film in hydrogen atmosphere:

[0035] Cut the carbon nanotube film into 1cm×1cm pieces with a blade and place them on the graphite sample stage of a microwave plasma enhanced chemical vapor deposition device (commercially available). image 3 Shown is the structural schematic diagram of the reaction chamber of the device; start the vacuum system to vacuum the reaction chamber to about 1.0×10 -3 After Pa, 15sccm hydrogen gas (purity 5N) was introduced, and the air pressure was adjusted to 1.5kPa. The sample stage was heated with a self-made graphite heater until the temperature was stabilized at 600°C, and the treatment was continued for 30 minutes to remove adsorbates and pollutants.

[0036] (2) Preparation of graphene sheets by microwave plasma enhanced chemical vapor deposition:

[0037] After heat-treating the carbon nanotube film in a hydrogen atmosphere, immediately raise the temperature of the substrate to 750°C, and adjust...

Embodiment 2

[0043] (1) Heat treatment of carbon nanotube film in hydrogen atmosphere:

[0044] Cut the carbon nanotube film into 1cm×1cm pieces with a blade and place them on the graphite sample stage of a microwave plasma enhanced chemical vapor deposition device (commercially available). image 3 Shown is the structural schematic diagram of the reaction chamber of the device; start the vacuum system to vacuum the reaction chamber to about 1.0×10 -3 After Pa, 15sccm hydrogen gas (purity 5N) was introduced, and the air pressure was adjusted to 1.5kPa. The sample stage was heated with a self-made graphite heater until the temperature was stabilized at 600°C, and the treatment was continued for 30 minutes to remove adsorbates and pollutants.

[0045] (2) Preparation of graphene sheets by microwave plasma enhanced chemical vapor deposition:

[0046] After heat-treating the carbon nanotube film in a hydrogen atmosphere, immediately raise the temperature of the substrate to 750°C, and adjust...

Embodiment 3

[0052] (1) Heat treatment of carbon nanotube film in hydrogen atmosphere:

[0053] Cut the carbon nanotube film into 1cm×1cm pieces with a blade and place them on the graphite sample stage of a microwave plasma enhanced chemical vapor deposition device (commercially available). image 3 Shown is the structural schematic diagram of the reaction chamber of the device; start the vacuum system to vacuum the reaction chamber to about 1.0×10 -3 After Pa, 15sccm hydrogen gas (purity 5N) was introduced, and the air pressure was adjusted to 1.5kPa. The sample stage was heated with a self-made graphite heater until the temperature was stabilized at 600°C, and the treatment was continued for 30 minutes to remove adsorbates and pollutants.

[0054] (2) Preparation of graphene sheets by microwave plasma enhanced chemical vapor deposition:

[0055] After heat-treating the carbon nanotube film in a hydrogen atmosphere, immediately raise the temperature of the substrate to 750°C, and adjust...

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Abstract

The invention discloses a graphene sheet-carbon nanotube film flexible composite material, a preparation method and an application thereof. It uses microwave plasma enhanced chemical vapor deposition method to prepare graphene sheet on carbon nanotube film, and uses the obtained graphene sheet-carbon nanotube film flexible composite material as a cathode to assemble a field emitter. The graphene sheet-carbon nanotube film flexible composite material prepared by this method has the characteristics of flexibility, and the graphene sheet is distributed on the carbon nanotube in an array state, and the number of graphene sheet layers is 1-10 layers, on the carbon nanotube film The distribution density on the surface is 8-12 pieces / square micron, and the width is 0.5-1.2 micron. Compared with the graphene sheet grown on the planar silicon substrate, the graphene sheet-carbon nanotube film flexible composite material prepared by this method has lower turn-on electric field and larger field emission current density, and can It works stably under the field emission current density and has high application value.

Description

[0001] This invention is funded by the National Natural Science Foundation of China-Youth Fund Project (Project No. 51302187). This work was supported by the Key Project of Tianjin Applied Basic and Frontier Technology Research Program (Project No. 14JCZDJC32100). technical field [0002] The invention belongs to the technical field of preparation and application of nanomaterials, and relates to the preparation of a flexible composite nanomaterial with a unique structure using a plasma-enhanced chemical vapor deposition method on a commercially available carbon nanotube film as a substrate, and using it for vacuum field electron emission Device fabrication method. Background technique [0003] Since its discovery in 2004, graphene has shown good application prospects in many aspects due to its excellent electrical, mechanical properties and chemical stability, including the development of vacuum field electronic devices. Graphene has sharp edges at the atomic scale and unpa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J37/20H01J9/00
Inventor 邓建华程琳
Owner TIANJIN NORMAL UNIVERSITY
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