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Ultra-long chiral carbon nanotube, and preparation method and application thereof and high-performance photoelectric device

A carbon nanotube and double-walled carbon nanotube technology, applied in the field of carbon nanotubes, can solve the problem that carbon nanotubes are difficult to maintain the long-term stability of the atomic structure, achieve large-scale preparation and application, perfect atomic arrangement, and facilitate continuous batches production effect

Inactive Publication Date: 2020-04-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to provide an ultra-long chiral carbon nanotube to alleviate the technical problem that the existing carbon nanotubes are difficult to maintain the long-term stability of the atomic structure

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  • Ultra-long chiral carbon nanotube, and preparation method and application thereof and high-performance photoelectric device
  • Ultra-long chiral carbon nanotube, and preparation method and application thereof and high-performance photoelectric device
  • Ultra-long chiral carbon nanotube, and preparation method and application thereof and high-performance photoelectric device

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preparation example Construction

[0071] The preparation method of the ultralong chiral carbon nanotube provided by the invention comprises the following steps:

[0072] (a) loading the catalyst in the reactor in solid, liquid or gaseous form, and placing the growth substrate in the reactor;

[0073] (b) under the protection of inert reducing gas, the reactor is heated to the reaction temperature, and then the mixed gas of carbon source and carrier gas is passed into the reactor for reaction;

[0074] (c) After the reaction is finished, an inert reducing gas is introduced into the reactor and cooled to obtain ultra-long chiral carbon nanotubes.

[0075] The preparation method of the ultra-long chiral carbon nanotube provided by the invention has the advantages of simple process, stable growth rate and easy control, which is beneficial to continuous batch production and realizes the large-scale preparation and application of the chiral carbon nanotube.

[0076] In a preferred embodiment of the present inventio...

Embodiment 1

[0123] This embodiment provides a kind of ultralong chiral carbon nanotube, and its preparation method comprises the following steps:

[0124] (1) will press with 0.1M FeCl 3 The silicon wafer substrate of the ethanol solution of the catalyst was placed in a quartz boat and placed inside the furnace reactor.

[0125] (2) Into the reactor, a mixture of 200 sccm (standard liter per minute flow) of argon and hydrogen (Ar:H 2 =1:2, v / v) as a protective gas, and start to heat up, when the temperature rises to 900-1010°C, keep the temperature constant for 20min. Then enter the reaction stage, pass into 180sccm methane and hydrogen gas mixture (H 2 :CH 4 =2:1, v / v), start the superlong carbon nanotube preparation reaction, and the reaction time is 25min.

[0126] (3) When the reaction is over, enter the cooling stage, and change the mixture of argon and hydrogen into 200sccm (Ar:H 2 =1:2, v / v) to prevent carbon tubes from being ablated during the cooling process. After the temp...

Embodiment 2

[0128] This embodiment provides a kind of ultralong chiral carbon nanotube, and its preparation method comprises the following steps:

[0129] (1) Place 0.3g FeCl upstream of the gas flow of the circular tube-shaped quartz reactor 3 Catalyst powder, feed the mixed gas of the argon of 200sccm and hydrogen (Ar:H in the reactor 2 =1:2, v / v) as a protective gas, and start to heat up. When the temperature rises to 1010°C, keep the temperature for 20 minutes and then enter the cooling stage, and open the reactor when it drops to room temperature.

[0130] (2) Place the silicon substrate with an oxide layer with a flat surface in the reactor, and feed a mixture of 200 sccm of argon and hydrogen into the reactor (Ar:H 2 =1:2, v / v) as a protective gas, and start to heat up, when the temperature rises to 900-1010°C, keep the temperature constant for 20min.

[0131] (3) Enter the reaction stage, change into 180sccm methane and hydrogen gas mixture (H 2 :CH 4 =2:1, v / v), start the pre...

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Abstract

The invention provides a super-long chiral carbon nanotube, and a preparation method and application thereof and a high-performance photoelectric device, and relates to the technical field of carbon nanotubes; the diameter of the super-long chiral carbon nanotube is 1.5-5.5 nm, and the length of the super-long chiral carbon nanotube is 100-650 mm; the super-long chiral carbon nanotube comprises adouble-walled carbon nanotube and a three-walled carbon nanotube; each tube layer is semiconductive, and the helical angle is greater than 10 degrees; the super-long chiral carbon nanotube provided bythe invention comprises a double-walled carbon nanotube and a three-walled carbon nanotube, is perfect in atomic arrangement and stable in structure, has narrow chiral distribution, and has unique chiral relevance between tube walls, so that the super-long chiral carbon nanotube has excellent optical, electrical, mechanical and thermal properties, and has a wide application prospect in the fieldof high-performance photoelectric devices.

Description

technical field [0001] The invention relates to the technical field of carbon nanotubes, in particular to an ultralong chiral carbon nanotube, a preparation method, an application and a high-performance photoelectric device. Background technique [0002] Carbon is the basic element of life, and the simplest chain combination of carbon atoms is carbon nanotubes. This kind of special carbon material with hollow tubular structure and high aspect ratio can be regarded as two-dimensional graphene curled in a certain direction, and the carbon nanotubes formed in different rotation axis directions have different optical rotation and chiral parameters. Under specific temperature, pressure and gas environment, tens of billions of carbon atom pairs can be precisely assembled on the template in the form of screw dislocations with ultra-high time-of-flight. Precise control of the chirality of carbon nanotubes is not only conducive to exerting their inherent excellent optical, electrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/158C01B32/164H01L51/46
CPCC01B32/158C01B32/164C01B2202/04C01B2202/36C01B2202/34C01B2202/20H10K85/221C01B2202/30C01B32/162C01B2202/06
Inventor 朱振兴魏飞高俊孙斯磊
Owner TSINGHUA UNIV
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