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Method for preparing, transferring and determining orientation of self-assembled carbon nanotube array for terahertz

A carbon nanotube array and carbon nanotube technology, applied in chemical instruments and methods, carbon compounds, optics, etc., can solve the problems of unfriendly environment, inhomogeneity, cumbersome steps, etc., and achieve the goal of overcoming unfriendly environment and high uniformity , The effect of breaking through the technical bottleneck

Active Publication Date: 2022-03-08
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The organic solvent chloroform that this method uses has certain toxicity to human body, is a kind of environment unfriendly reagent, and chloroform dissolves filter membrane to need certain time simultaneously, usually whole transfer step spends 20 minutes; Swelling occurs, so transfer of carbon nanotubes to polydimethylsiloxanes and flexible substrates that swell with chloroform cannot be achieved by this method; wet transfer also occurs due to van der Waals binding of carbon nanotubes to the target substrate The carbon nanotubes are not compact, resulting in voids and inhomogeneity in the transferred carbon nanotubes; in addition, for the alignment of carbon nanotubes, the current methods to obtain the arrangement direction of carbon nanotubes mainly include Raman spectroscopy, terahertz spectroscopy and scanning electron microscopy. , but these methods are cumbersome and damage the sample

Method used

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  • Method for preparing, transferring and determining orientation of self-assembled carbon nanotube array for terahertz
  • Method for preparing, transferring and determining orientation of self-assembled carbon nanotube array for terahertz
  • Method for preparing, transferring and determining orientation of self-assembled carbon nanotube array for terahertz

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Such as figure 1 As shown, the specific implementation device includes a glass bottle 1, a conduit 2, a vacuum pump 3, a vacuum bottle 4, a rubber stopper 5, a connecting pipe fitting 6, a filter membrane 7, and a carbon nanotube solution 8; the glass bottle 1 is placed above the vacuum bottle 4 The bottom of the glass bottle 1 is open, and the opening is connected to the inside of the vacuum bottle 4 through the connecting pipe fitting 6. The connecting pipe fitting 6 is arranged with a filter element at the connection with the bottom opening of the glass bottle 1, and the filter element is covered with a filter membrane 7. The connection between the vacuum bottle 4 and the vacuum pump 3 ; The pipeline connecting the pipe fitting 6 is filled with a rubber plug 5 .

[0055] The connecting tube 6 includes an upper disc body and a lower tube body. The disc body is embedded in the opening at the bottom of the glass bottle 1. The filter elements and filter membranes 7 are s...

Embodiment 2

[0058] Such as figure 2 As shown, the device for specific implementation includes a glass bottle 1, a vacuum pump 3, a vacuum bottle 4, a rubber stopper 5, a connecting pipe fitting 6, and a filter membrane 7; The connecting pipe 6 is connected to the inside of the vacuum bottle 4, and the connecting pipe 6 is arranged with a filter element at the connection with the bottom opening of the glass bottle 1, and the filter element is covered with a filter membrane 7, and the vacuum bottle 4 and the vacuum pump 3 are connected; the pipe of the connecting pipe 6 is filled with rubber Plug 5.

[0059] The connecting tube 6 includes an upper disc body and a lower tube body. The disc body is embedded in the opening at the bottom of the glass bottle 1. The filter elements and filter membranes 7 are stacked on the surface of the disc body from bottom to top, and the upper end of the tube body is concentrically connected to the disc. In the central through hole of the body, the lower en...

Embodiment 3

[0064] Such as Figure 6 As shown, the obtained self-assembled carbon nanotube array was covered on the polydimethylsiloxane flexible substrate in parallel downwards, and the polycarbonate filter membrane adhering to it was facing upwards, 10uL of ultrapure water was added dropwise, and the self-assembled carbon nanotube array was vertically Apply a force of 5N evenly on the surface of the assembled carbon nanotube array. After 10s, use tweezers to uncover the polycarbonate filter membrane along one side of the film, so as to realize the self-assembled carbon nanotubes from the polycarbonate film to the polydimethylsiloxane flexible substrate. transfer.

[0065] The results of 2cm×2cm self-assembled carbon nanotubes transferred to polydimethylsiloxane flexible substrate are as follows: Figure 7 As shown, the film after transfer is uniform and complete.

[0066] A 200nm gold layer was sputtered on the side of polydimethylsiloxane not in contact with the carbon nanotube array...

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Abstract

The invention discloses a method for preparing, transferring and determining orientation of a self-assembled carbon nanotube array for terahertz. According to the method, a high-density carbon nano tube array is prepared on a filter membrane through a vacuum filtration device, preparation of a horizontally-arranged and directionally-arranged carbon nano tube film can be achieved in combination with assistance of a gold electrode, and the conduction direction of the gold electrode is the arrangement direction of the carbon nano tubes. According to the method, the carbon nanotube array (directional / non-directional arrangement) with the nanoscale thickness can be prepared, rapid transfer of the carbon nanotube array is achieved in a simple, green and environment-friendly mode, meanwhile, the orientation of the directionally-arranged carbon nanotubes is measured through a rapid and lossless method, and the method has high application value in the field of preparation of terahertz devices based on the carbon nanotubes.

Description

technical field [0001] The invention relates to a method for preparing and processing carbon nanotubes in the field of self-assembled carbon nanotube arrays, in particular to a method for preparing, transferring and measuring orientation of self-assembled carbon nanotube arrays for terahertz. Background technique [0002] Carbon nanotubes are one-dimensional nanomaterials with high electrical conductivity, which exhibit unique photoelectric effects and are widely used in the preparation of terahertz optoelectronic devices, such as photodetectors, polarizers, and absorbers. [0003] Compared with the preparation of carbon nanotubes by vapor deposition, self-assembled carbon nanotube technology can obtain carbon nanotubes with high purity, single chirality and nanometer thickness, which can better exert the photoelectric performance of carbon nanotubes. At present, for self-assembled carbon nanotube films, the transfer method is chemical wet etching, which uses the principle t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/168G02F1/00
CPCC01B32/168G02F1/0018G02F2203/13
Inventor 谢丽娟尹吉帆应义斌李麟
Owner ZHEJIANG UNIV