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Graphene sheet-carbon nanotube film flexible composite material, preparation method and application thereof

A technology of carbon nanotube film and graphene sheet, which is applied in the field of preparation and application of nanomaterials, can solve the problems that have not been discovered, and achieve the effect of small current fluctuation and good field emission stability

Inactive Publication Date: 2016-01-13
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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  • Graphene sheet-carbon nanotube film flexible composite material, preparation method and application thereof
  • Graphene sheet-carbon nanotube film flexible composite material, preparation method and application thereof
  • Graphene sheet-carbon nanotube film flexible composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Heat treatment of carbon nanotube film in hydrogen atmosphere:

[0033] 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.

[0034] Graphene sheets prepared by microwave plasma enhanced chemical vapor deposition:

[0035] After heat-treating the carbon nanotube film in a hydrogen atmosphere, immediately raise the temperature of the substrate to 750°C, and adjust the air press...

Embodiment 2

[0041] Heat treatment of carbon nanotube film in hydrogen atmosphere:

[0042] 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.

[0043] Graphene sheets prepared by microwave plasma enhanced chemical vapor deposition:

[0044] After heat-treating the carbon nanotube film in a hydrogen atmosphere, immediately raise the temperature of the substrate to 750°C, and adjust the air press...

Embodiment 3

[0050] Heat treatment of carbon nanotube film in hydrogen atmosphere:

[0051] 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.

[0052] Graphene sheets prepared by microwave plasma enhanced chemical vapor deposition:

[0053] After heat-treating the carbon nanotube film in a hydrogen atmosphere, immediately raise the temperature of the substrate to 750°C, and adjust the air press...

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Abstract

The invention discloses a graphene sheet-carbon nanotube film flexible composite material, preparation method and application thereof. Graphene sheets are prepared by employing the microwave plasma-enhanced chemical vapor deposition method on a carbon nanotube film, and a graphene sheet-carbon nanotube film flexible composite material obtained is used to manufacture a cathode assembly field emitter. The graphene sheet-carbon nanotube film flexible composite material prepared by the method of the invention has the flexible characteristic. 1-10 layers of graphene sheets having a width of 0.5-1.2 micrometers are distributed on the carbon nanotube in an array manner, with a distribution density of 8-12 piece / [mu]m2. Compared with graphene sheets grown on a planar silicon substrate, the graphene sheet-carbon nanotube film flexible composite material prepared by the method of the invention has lower turn-on field and higher field emission current density and is able to work stably under relatively high field emission current density, thereby achieving great application values.

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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IPC IPC(8): H01J37/20H01J9/00
Inventor 邓建华程琳
Owner TIANJIN NORMAL UNIVERSITY
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