Method for nano zinc oxide crystal surface controllable growth

A nano-zinc oxide, crystal face technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of limitation, cumbersome operation process, harsh reaction conditions, etc., to achieve no vapor pressure, high reaction efficiency, decomposition The effect of high voltage

Inactive Publication Date: 2009-06-17
XIAMEN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

(Yang, R.S.; Ding, Y, Wang, Z.L.Nano Lett., 2004, 4: 1309.) However, the above-mentioned methods are all carried out at high temperature, and the reaction process needs Ar carrier gas, the operation process is relatively loaded down with trivial details, and the reaction conditions are relatively harsh
More importantly, the surface structure of the product is composed of polar and non-polar surfaces, which is limited to a certain extent in practical applications.

Method used

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  • Method for nano zinc oxide crystal surface controllable growth
  • Method for nano zinc oxide crystal surface controllable growth
  • Method for nano zinc oxide crystal surface controllable growth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) In a glass test tube about 42cm long, mix 1.6ml ethylenediamine and 2.2ml oleic acid evenly to obtain an orange-yellow transparent liquid, and then add 0.24g anhydrous zinc acetate.

[0019] (2) Insert the glass test tube vertically into the tube furnace and put it on the thermocouple. After 5 minutes, it was heated to 270°C and kept at a constant temperature for 20 minutes.

[0020] (3) After cooling to room temperature, the glass tube was taken out and the upper layer of orange-yellow solution was poured out, and the lower layer of light-yellow precipitate was repeatedly washed with n-hexane and ethanol for 10 times, and the final product was dispersed in ethanol.

[0021] The morphology, composition and microstructure of the product are systematically studied by XRD, SEM, TEM, HRTEM and other modern nano-testing and analysis techniques. XRD characterizes pure wurtzite ZnO as figure 1 As shown in (A), the unit cell parameters are a=3.25A, c=5.21A, and the space ...

Embodiment 2

[0023] (1) In a glass test tube about 42cm long, mix 0.8ml ethylenediamine and 1.1ml oleic acid evenly to obtain an orange-yellow transparent liquid, and then add 0.24g anhydrous zinc acetate.

[0024] (2) Insert the glass test tube vertically into the tube furnace and put it on the thermocouple. After 10 minutes, it was heated to 286°C and kept at a constant temperature for 40 minutes.

[0025] (3) After the reaction was completed, the glass tube was taken out and the upper layer of the orange-yellow solution was poured out, and the lower layer of the light-yellow precipitate was repeatedly washed with n-hexane and ethanol for 10 times, and the final product was dispersed in ethanol.

[0026] The product is characterized by XRD, SEM, and TEM as a ZnO hexagonal pyramid structure, and the diameter and height of the bottom surface are both 1-1.5 μm. The bottom surface is a (0001) polar surface, and the side surface is a {1011} polar surface. PL shows a very strong fluorescence...

Embodiment 3

[0028] (1) In a glass test tube about 42cm long, mix 0.8ml ethylenediamine and 1.1ml oleic acid evenly to obtain an orange-yellow transparent liquid, and then add 0.24g anhydrous zinc acetate.

[0029] (2) Insert the glass test tube vertically into the tube furnace and put it on the thermocouple. After 15 minutes, it was heated to 286°C and kept at a constant temperature for 2 hours.

[0030] (3) After the reaction is completed, take out the glass tube and pour out the reddish-brown solution in the upper layer, and wash the light yellow precipitate in the lower layer with n-hexane and ethanol repeatedly for 10 times, and finally the product is dispersed in ethanol.

[0031] The product is characterized by XRD, SEM, and TEM as a ZnO hexagonal pyramid structure, and the diameter and height of the bottom surface are both 1-1.5 μm. The bottom surface is a (0001) polar surface, and the side surface is a {1011} polar surface. PL shows a very strong fluorescence emission in the green...

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Abstract

The present invention provides process of decomposing zinc oxosalt inside ionic liquid to realize nanometer zinc oxide crystal growth with controllable crystal face. The process includes the following steps: mixing the water solution of ethylene diamine, trioctylamine or methylamine with oleic acid; adding zinc oxosalt, maintaining at 270-400 deg.c for 20-240 min, cooling, taking the yellowish precipitate, and washing with n-hexane or ethanol to obtain the nanometer zinc oxide crystal. Ionic liquid is introduced into the reaction of decomposing zinc oxosalt, and the electrostatic effect between the positive and negative ions in the ionic liquid and the polar surface of zinc oxide is utilized in alter the surface energy of the polar surface so as to control crystal face of growing zinc oxide crystal. The process of the present invention has the advantages of novel crystal configuration, simple apparatus, easy operation, mild preparation condition, no pollution, etc.

Description

technical field [0001] The invention relates to a method for realizing the controllable growth of nano-zinc oxide crystal face by using ionic liquid. Background technique [0002] Anisotropy is one of the basic properties of a single crystal, and the vector (such as thermal conductivity, magnetic permeability, optical refractive index, etc.) and tensor (such as dielectric coefficient, elastic coefficient, diffusion coefficient, etc.) properties depend entirely on the crystal Therefore, different physical and chemical properties will be exhibited on different crystal planes or directions of the crystal. Therefore, with the rapid development of industry, the miniaturization requirements of electronic devices and photonic devices are increasing, and the research on nanomaterials and structures is rapidly expanding and deepening. The importance of targeted design and development of nanomaterials with controllable surface structures is increasing. protrude. Nanomaterials with c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B7/00C30B29/16C01G9/02
CPCC30B7/00
Inventor 谢兆雄周樨江智渊匡勤谢素原林志为黄荣彬郑兰荪
Owner XIAMEN UNIV
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