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Nucleation water-phase preparation method of ZnSe:Mn quantum dots

A water-phase preparation and quantum dot technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of complex preparation process and low biocompatibility, and achieve the effect of simple experimental operation, high luminous efficiency and good stability

Inactive Publication Date: 2013-09-25
SHANGHAI UNIV
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  • Application Information

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Problems solved by technology

[0004] At present, the synthesis of Mn-doped ZnSe quantum dots mostly adopts organic synthesis method, which is carried out in organic solvent, the preparation process is complicated, and the biocompatibility is low.

Method used

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  • Nucleation water-phase preparation method of ZnSe:Mn quantum dots
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  • Nucleation water-phase preparation method of ZnSe:Mn quantum dots

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Embodiment Construction

[0021] The preparation process and steps in this embodiment are as follows:

[0022] a. In a 50ml pear-shaped bottle, after passing through argon for about 30 minutes, add 0.032g NaBH in sequence 4 , 0.016g of selenium powder (Se) and 3ml of deionized water; then the pear-shaped bottle was placed in a warm water bath under the protection of argon to react for 1h, until all the black selenium powder disappeared, and a colorless, transparent and clear solution I was generated, i.e. NaHSe solution;

[0023] b. Add 0.0098g of manganese acetate, 50ml of deionized water and 10μL of 3-mercaptopropionic acid into a 100ml beaker, and adjust the pH value to 7-8 with 1M NaOH. Pour the newly prepared solution II into a three-necked flask, heat the flask in an oil bath at 100°C, and stir magnetically for half an hour;

[0024] c. Use a syringe to quickly inject solution I into solution II, continue to flow argon and maintain an oil bath at 100°C;

[0025] d. Add 0.28g of zinc acetate to...

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Abstract

The invention relates to a nucleation water-phase preparation method of ZnSe:Mn quantum dots, belonging to the technical field of composite nano microcrystal materials. The inner core of the product is MnSe quantum dots, and the outer layer is ZnSe quantum dots. The preparation method comprises the following steps: reacting sodium borohydride (NaBH4) and selenium powder to prepare sodium hydrogen selenide (NaHSe), injecting the sodium hydrogen selenide into a manganese acetate / 3-mercaptopropionic acid solution of which the pH value is regulated by sodium hydroxide so as to react to generate a MnSe quantum dot solution, and adding a zinc acetate / 3-mercaptopropionic acid solution of which the pH value is regulated by sodium hydroxide into the MnSe quantum dot solution to form ZnSe:Mn quantum dots. The product obtained by the method provided by the invention has the advantages of uniform dispersion, high stability and less aggregation, and can be used in the fields of biological fluorescence labeling, drug isolation and some photoelectric devices.

Description

technical field [0001] The invention relates to a nucleation aqueous phase preparation method of ZnSe:Mn quantum dots, and belongs to the technical field of composite nano-microcrystalline materials. Background technique [0002] ZnSe is an important direct bandgap Ⅱ-Ⅵ group semiconductor luminescent material. It is a sphalerite structure and a face-centered cubic crystal with a wide bandgap (2.8eV) and a large binding energy (21meV). At room temperature, the band gap directly transitions to a luminescent wavelength in the range of blue-violet light. It has good transmission performance for light with a wavelength range of 0.5-22 μm, basically covers the visible-infrared range, and has low material toxicity. It is suitable for optoelectronic devices, biological detection, marking and imaging and other fields. [0003] In order to realize the wide application of ZnSe in optoelectronic and biological fields, it is necessary to obtain ZnSe materials with high quantum yield and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88
Inventor 李冬梅蒋洁如程经纬程涛刘昆
Owner SHANGHAI UNIV
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