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Method for preparing carbon nano-tubes by gas induce and products produced thereby

A technology of carbon nanotubes and airflow, which is applied in gaseous chemical plating, manufacturing microstructure devices, and techniques for producing decorative surface effects. highly reproducible effect

Inactive Publication Date: 2010-03-17
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the methods for preparing carbon nanotubes reported in the literature all use the airflow form naturally formed by the growth gas flowing through the growth container, so what are prepared are only some relatively simple arrangements and relatively simple orientations. Fixed carbon nanotube samples

Method used

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  • Method for preparing carbon nano-tubes by gas induce and products produced thereby
  • Method for preparing carbon nano-tubes by gas induce and products produced thereby
  • Method for preparing carbon nano-tubes by gas induce and products produced thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Growth of carbon nanotubes with controllable orientation by rapid heating CVD method

[0037] This embodiment adopts as figure 1 The shown conventional experimental device prepares carbon nanotubes, and this device comprises: 1) quartz tube; 2) tubular electric furnace; 3) substrate; 4) airflow barrier; 5) slide

[0038] The present embodiment method comprises the following steps:

[0039] 1. Place the substrate (silicon wafer) cleaned and attached with the catalyst precursor on the center of the slide;

[0040] 2. Set up airflow barriers (cylinders) on both sides of the substrate according to the desired orientation of carbon nanotubes, and use Fluent6.1 to simulate the flow pattern of the reactive airflow, and correct the position of the airflow barriers according to the flow pattern until the obtained airflow pattern The simulation results approximate the desired carbon nanotube orientation as figure 2 a and 3a;

[0041] 3. Push the slide into the mid...

Embodiment 2

[0048] This embodiment adopts the same device and steps as in Embodiment 1, the difference is that the setting of the airflow barrier is as follows: figure 2 As shown in b, the simulation results of the reaction gas flow pattern are as follows image 3 As shown in b, the obtained carbon nanotubes were characterized by electron microscopy, and obtained as Figure 4 Electron micrograph shown in b.

Embodiment 3

[0050] This embodiment adopts the same device and steps as in Embodiment 1, the difference is that the setting of the airflow barrier is as follows: figure 2 As shown in c, the simulation results of the reaction gas flow pattern are as follows image 3 As shown in c, the obtained carbon nanotubes were characterized by electron microscopy, and obtained as Figure 4 Electron micrograph shown in c.

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Abstract

The invention discloses a method for preparing carbon nanotube by air current inducement and a product thereof, which pertain to the technical filed of carbon nanotube. The method of the invention prepares carbon nanotube by a chemical vapor deposition method and controls the growth orientation of the carbon nanotube by arranging an air current obstructing object to change the advection flow pattern of the reaction air current that flows above a substrate. More particularly, the method of the invention can be implemented by the steps as follows: a) the air current obstructing object is arranged in a reaction container according to the target orientation of the carbon nanotube; b) reaction gas is piped into the reaction container in inert environment and reacts on the substrate at the reaction temperature, and the carbon nanotube is produced; c) the carbon nanotube produced is cooled in inert environment, and the goal-oriented carbon nanotube is obtained. The invention also requests theprotection of the carbon nanotube prepared by the method. The carbon nanotube prepared by the method of the invention has controllable orientation and high concentration, and has broad application prospect.

Description

technical field [0001] The present invention relates to a method for preparing carbon nanotubes, in particular, the present invention relates to a method for preparing carbon nanotubes with controllable orientation by chemical vapor deposition under the induction of reaction gas flow, and the orientation controllable carbon nanotubes prepared by the method. A controllable carbon nanotube belongs to the technical field of carbon nanotubes. Background technique [0002] Nanotechnology has become the most important science and technology in the 21st century. From chemistry to physics, from electronics to machinery, from energy to biomedicine, various fields have attracted widespread attention, and it has gradually entered life. Among the many materials in the nanometer world, carbon nanotubes are undoubtedly the stars. Since Professor Iijima, a Japanese scientist, presented carbon nanotubes, a unique nanomaterial, to the world in 1991, great progress has been made in the prepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B81C1/00
Inventor 刘宇李彦
Owner PEKING UNIV