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Preparation method of quantum dot self-assembling nano structural material

A nanostructure and self-assembly technology, applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems of complex preparation process, high process requirements, difficult mass preparation, etc.

Inactive Publication Date: 2008-04-09
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can prepare nanostructures with various shapes and certain spatial patterns, it is difficult to achieve a large number of preparations to meet future market demand due to the complexity of the preparation process and high process requirements.

Method used

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  • Preparation method of quantum dot self-assembling nano structural material
  • Preparation method of quantum dot self-assembling nano structural material
  • Preparation method of quantum dot self-assembling nano structural material

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1: 0.4 g of copper acetate monohydrate was dissolved in 70 ml of diethylene glycol, and the solution was heated to 180° C. with stirring. At the same time, 0.075 g of thioacetamide was dissolved in 30 ml of diethylene glycol by ultrasonic method, and the solution was sealed and allowed to stand for 3 hours, then added to the above-mentioned 180°C copper acetate solution, and reacted for 3 hours to obtain black suspension. After the system was naturally cooled to room temperature, the black product was separated by centrifugation, washed three times with absolute ethanol, and dried in a vacuum oven to obtain the final self-assembled upright nanorod array of cuprous sulfide quantum dots. It can be seen from the transmission and scanning electron microscope photos (Fig. 1) that the upright nanorod array is self-assembled by small particles of about 5 nanometers.

[0039] Keep above-mentioned same preparation condition, just change the time that thioacetamide digly...

Embodiment 2

[0043] Example 2: 2.3 mmol / L anhydrous copper acetate and 4.3 mmol / L acetamide were ultrasonically dissolved in 50 ml of diethylene glycol solvent, the solution was heated to 180° C. and kept at this temperature for 8 hours, A yellow precipitate precipitated out. After the suspension solution was cooled to room temperature, the precipitate was separated by centrifugation, and the solvent was washed away with ethanol, and a yellow product was obtained after drying in a vacuum oven for 5 hours. The product is a flower-like super nanostructure formed by self-assembly of 3-5 nanometer quantum dots, and its scanning and transmission electron microscope photos are shown in FIG. 4 . What Fig. 5 shows is the spectrogram of the ultraviolet diffuse reflectance of this structural material and corresponding calculated energy band width (bandgap energy) (curve A in the figure), with our own cuprous oxide 200 nanometer cube (curve B in the figure ), the absorption peak of the flower-like n...

Embodiment 3

[0044] Example 3: 3 grams of zinc acetate was mixed with 300 milliliters of ethylene glycol solvent, ultrasonically dissolved, and the temperature was raised to 250° C. under vigorous stirring. After the hydrolysis reaction continued for 2 hours, it was cooled to room temperature. After centrifugation, washing, and repeating 3 times, the white ZnO super nanostructure can be obtained by drying in an oven. Observation by high-resolution transmission electron microscopy reveals that the nanostructure is a dendritic structure formed by self-assembly of single crystals of 3-10 nanometers (as shown in FIG. 6 ). XRD detection proves that the crystal is ZnO (see Figure 7).

[0045] The preparation process of the CdO quantum dot self-assembled super nanostructure is basically the same as the above, except that the solvent is butanediol.

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Abstract

The invention discloses a preparation method of a super nanostructure material formed by quantum dots self-assembly. That the alcohols are used as solvent to prepare nano-metal oxides and sulphides or metal oxides and sulphides are reduced to get nano-metal is a widely used method. The super nanostructure material formed by the quantum dots self-assembly draws much attention because of the superior comprehensive properties. The application prospect is wide enough. The invention adopts a method of using the alcohols as the solvent that a super nanostructure with different appearances and is formed by the quantum dots self-assembly which is obtained by changing the condition under the existence condition of surfactant. According to the invention, precursor, namely organic metal compound is dissolved in the alcohol solvent by ultrasonic, stirring and being laid down quietly. Under the effect of the surfactant, the precursor has a nucleation and grows into a plurality of quantum dots, the size of which is similar to nano. Then the dots form a super nanostructure which has a certain shape or space structure along the defined growing direction of the surfactant.

Description

technical field [0001] The invention belongs to a preparation method of a quantum dot self-assembled super nanostructure material. Super nanostructure materials have application prospects in sensors, nanoelectronic devices, ultra-high magnetic recording multimedia, lithium batteries and solar cells based on nanostructures, as well as new catalysts, bactericides, and algicides. Background technique [0002] Recently, the formation of super nanostructures by self-assembly has attracted great attention, because the prepared super nanostructure materials have a wide range of applications in catalysis, medicine, electronics, ceramics and other fields (Chem.Commun.2004 , 2182). A large number of experimental methods such as molecular cross-linking method (Adv.Mater.1995, 7, 795), DNA template method (Nature 1996, 382, ​​607), chemical and micro-preparation method (Adv.Mater.2001, 13, 427), The self-assembled superlattice method (Adv. Mater. 1998, 10, 13) etc. has been developed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/08C01G3/12C01G3/02C01G9/02C01G23/053C01G33/00C01G55/00C01G53/04C01G19/02C01G41/02C01G29/00H01L31/18H01L21/00B82B3/00
CPCY02P70/50
Inventor 余颖马丽丽彭梦
Owner HUAZHONG NORMAL UNIV
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