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Method for preparing crossing array of Nano carbon tubes

A carbon nanotube and cross-array technology, which is applied in the processing field of carbon nanotubes, can solve the problems of complex methods, influence intrinsic properties, destroy the molecular structure of carbon nanotubes, etc., and achieves simple process, easy operation and good repeatability. Effect

Inactive Publication Date: 2006-12-06
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art mainly manipulates a single carbon nanotube by means of an atomic force microscope to form a cross junction of carbon nanotubes (M.S.Fuhrer, J.Nygard, L.Shih, et al., Science, Vol.288, P .494, 2000; A.Bachtold, M.de Jonge, K.Grove-Rasmussen, and P.L.McEuen, Phys.Rev.Lett., Vol.87, P.166801, 2001), but the method is inefficient, It is difficult to effectively manipulate multiple carbon nanotubes at the same time, so it is not suitable for large-scale preparation of cross junctions.
In addition, researchers tried to use an external electric field to arrange the carbon nanotubes in a predetermined direction, thereby realizing the cross arrangement of several carbon nanotubes (M.R.Diehl, S.N.Yaliraki, R.A.Beckman, M.Barahona, and J.R.Heath, Angew.Chem. Int.Ed., Vol.41, P.353, 2002), but this method is relatively complicated, and metal electrodes need to be prepared in two directions perpendicular to each other, and the high electric field itself may destroy the molecular structure of carbon nanotubes and affect its Intrinsic performance

Method used

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  • Method for preparing crossing array of Nano carbon tubes
  • Method for preparing crossing array of Nano carbon tubes
  • Method for preparing crossing array of Nano carbon tubes

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Experimental program
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Effect test

Embodiment 1

[0028] The purified single-wall carbon nanotube bundles are ultrasonically dispersed in dimethylformamide solvent, the silica substrate is immersed in the solution containing carbon nanotubes, and the substrate is pulled up in two directions perpendicular to each other, twice The substrate is properly baked between pulls. Such as figure 2 As shown, the arrows in the figure all represent the direction in which the substrate is pulled by the external force, and the carbon nanotube bundles are arranged in an orderly manner along the two pulling directions to form a cross junction.

Embodiment 2

[0030] The purified single-walled carbon nanotube bundles were ultrasonically dispersed in dimethylformamide solvent, and the silica substrate modified with aminopropyltriethoxysilane was immersed in the solution containing carbon nanotubes, and The substrates are pulled successively in the vertical direction, and the substrates are properly baked between the two pulls. Such as image 3 As shown, the arrows in the figure all represent the direction in which the substrate is pulled by the external force, and the carbon nanotube bundles are arranged in an orderly manner along the two pulling directions, and multiple cross junctions are formed.

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Abstract

This invention provides a method for preparing crossed carbon nanotube arrays. The method comprises: (1) immersing a substrate in a solution of carbon nanotubes so that carbon nanotubes are adsorbed by the substrate surface; (2) pulling the substrate out of the solution with carbon nanotubes aligned along a first direction on its surface; (3) immersing the same substrate in the solution of carbon nanotubes, and pulling out so that carbon nanotubes are aligned along a second direction crossed with the first one. The method can be used to realize aligned arrangement of carbon nanotubes on substrate surfaces, and produce large-scale crossed carbon nanotube arrays.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube processing, and in particular relates to a method for preparing a carbon nanotube cross array. Background technique [0002] Nanoelectronic device research is a hot spot in the field of nanotechnology in recent years, and nanostructure material assembly technology provides an effective way to realize nanoelectronic devices. Due to its unique molecular structure and electrical properties, carbon nanotubes are expected to become important materials for nanoelectronic devices. At present, various nanoelectronic devices have been obtained by using carbon nanotubes, such as: diodes, field effect transistors, etc., and the performance of the devices is comparable to that of traditional silicon devices. Recently, simple logic circuits (OR gates, NOT door, etc.). However, if carbon nanotubes are to be widely used in next-generation electronic devices, the problem of large-scale integration of de...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 郭奥傅云义张昃刘佳黄如张兴
Owner PEKING UNIV