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Aluminum nitride single-edge nano-comb and method for preparing the same

A nano-comb and aluminum nitride technology, which is applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of aluminum nitride single-sided nano-combs that have not been reported, the process is not easy to control, and the synthesis time is long. The effect of short preparation time, low cost and simple method

Inactive Publication Date: 2009-08-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people have prepared aluminum nitride nanowires, nanoribbons, Nanotips, nanotubes, and aluminum nitride nanostructures with peculiar shapes, such as nanoflowers, nanorings, etc., but the method of preparing nanocombs requires high cost, long synthesis time and complicated process that is difficult to control, which limits its development; And pollute the environment due to the use of catalysts and templates
[0004] For the preparation of aluminum nitride single-sided nanocombs has not been reported

Method used

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  • Aluminum nitride single-edge nano-comb and method for preparing the same
  • Aluminum nitride single-edge nano-comb and method for preparing the same
  • Aluminum nitride single-edge nano-comb and method for preparing the same

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Embodiment 1

[0022] Example 1 Combined figure 1 A device for preparing nanocombs of the present invention is described.

[0023] figure 1 Among them, 1 is the reaction chamber; 2 is the water-cooled collection wall; 3 is the tungsten cathode, which can be rod-shaped; 4 is the aluminum block; 5 is the anode of the copper pot, and the cathode 3 and the anode 5 are connected to the DC power supply; 6 is the circulating cooling water port , including a water inlet and a water outlet; 7 is a gas mixture inlet; 8 is an air release port, 9 is a water inlet of a water-cooled collection wall, and 10 is a water outlet of a water-cooled collection wall.

[0024] The water-cooled collection wall 2 is used for cooling the reaction, so as to protect the device for preparing the nanocomb.

Embodiment 2

[0025] Example 2 The whole process of preparing AlN single-sided nanocomb.

[0026] First, high-purity Al blocks (purity 99.999%) are put into a copper pot in a reaction chamber of a DC arc discharge device. The anode of the arc discharge device is a copper pot, the cathode is a tungsten electrode with a diameter of 3mm, and the anode is fed with circulating cooling water. The reaction chamber of the DC arc discharge device is evacuated (less than 5 Pa), and then filled with a mixed gas of nitrogen and ammonia (gas purity 99.999%) to 20 kPa. The volume ratio of ammonia in the mixed gas is 5%. After reacting at a voltage of 15V and a current of 80A for 10 minutes, the white powder collected on the anode copper pot and the Al block was an AlN single-sided nanocomb.

[0027] from figure 2 with image 3 It can be seen that the nanowire array of the unilateral nanocomb structure grows from one side of the middle trunk, while the other side of the trunk is very flat, and no nan...

Embodiment 3

[0029] Example 3 The whole process of preparing AlN single-sided nanocomb.

[0030] First, high-purity Al blocks (purity 99.999%) are put into a copper pot in a reaction chamber of a DC arc discharge device. The anode of the arc discharge device is a copper pot, the cathode is a tungsten electrode with a diameter of 5mm, and the anode is fed with circulating cooling water. The reaction chamber of the DC arc discharge device is evacuated (less than 5 Pa), and then filled with a mixed gas of nitrogen and ammonia (purity 99.999%) to 30 kPa. The volume ratio of ammonia in the mixed gas is 10%. After reacting at a voltage of 30V and a current of 100A for 30 minutes, the white powder collected on the anode copper pot and the Al block was an AlN single-sided nanocomb.

[0031] Image 6 It can be seen from the SEM image that the nanowire array of the unilateral nanocomb structure grows from one side of the middle trunk, while the other side of the trunk is very flat, and no nanowir...

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Abstract

The invention relates to an aluminum nitride unilateral nano comb and a preparation method thereof, and belongs to the technical field of nano materials and preparation of the nano materials. The aluminum nitride unilateral nano comb has a unilateral pectinate structure formed by a nano wire array, wherein a nano wire is grown from one side of a middle stem and consists of AIN with a hexagonal wurtzite crystal structure; and the diameter of the nano wire is approximately between 50 and 80 nanometers in general, and the length of the nano wire is approximately between 1 and 1.5 mu m. The preparation method adopts a direct-current arc discharge device, makes metallic aluminum directly react with mixed gas of nitrogen and ammonia gas under the condition of a high-temperature and low-pressure system, and prepares a white nano comb sample. The method synthesizes the AIN unilateral nano comb structure with high purity and uniform arrangement for the first time; the preparation method is simple and environment-friendly, and has good repeatability, short time, and low cost; and the aluminum nitride unilateral nano comb has application prospect in the aspects of laser interference / coupling, nano laser arrays, nano electromechanical systems, and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a simple method for preparing high-purity aluminum nitride single-sided nanocombs. Background technique [0002] Since Iijima first observed carbon nanotubes with a high-resolution electron microscope in 1991, the research on one-dimensional nanostructured materials (nanowires, nanotubes, nanorods, and nanobelts, etc.) has been a foreword and hotspot in the field of nanostructured materials. This is because one-dimensional nanostructured materials play a very important role in understanding the basic physical properties of nanomaterials and building nanofunctional devices and other application fields. With the development of one-dimensional nanomaterials, hierarchical nanostructures, such as nanocombs and tetraneedle nanorods, have been reported one after another. But so far, only ZnO single-sided and double-sided nanocombs have been controllably syn...

Claims

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Application Information

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IPC IPC(8): C01B21/072
Inventor 类伟巍崔啟良刘丹张剑陈晓辉郝健金云霞詹宝庆王秋实梁罡
Owner JILIN UNIV
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