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Water-phase preparation method of ZnSe:Ag quantum dots

A water-phase preparation and quantum dot technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as poor stability, achieve good stability, less agglomeration, and easy control of the process

Inactive Publication Date: 2013-09-25
SHANGHAI UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, the stability of ZnSe: Cu and ZnSe: Mn is poor, and usually precipitates after about 7 days of storage.

Method used

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  • Water-phase preparation method of ZnSe:Ag quantum dots
  • Water-phase preparation method of ZnSe:Ag quantum dots
  • Water-phase preparation method of ZnSe:Ag quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] a. In a 100ml pear-shaped bottle, after passing through nitrogen for about 30 minutes, add 0.8mmol NaBH in sequence 4 , 0.2mmol selenium powder (Se) and 2mL deionized water; then the pear-shaped bottle was reacted under nitrogen protection for 1h, until the black selenium powder disappeared completely, and a colorless, transparent and clear solution I was generated, i.e. NaHSe solution, for use;

[0022] b. In a 250ml three-neck flask, add 0.8mmol zinc nitrate, 0.024mmol silver nitrate, 100ml deionized water and 200μL 3-mercaptopropionic acid in sequence, pass through nitrogen to remove the oxygen in the solution, and then adjust the pH to 9 with 1M NaOH. The three-necked flask was heated in an oil bath at 100°C for 1 hour to obtain a colorless and transparent solution II, namely Zn(NO 3 ) 2 (Ag) solution;

[0023] c. Quickly inject solution I into solution II with a syringe, continue to pass nitrogen gas and maintain an oil bath at 100°C, and react for 3 hours to obt...

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Abstract

The invention relates to a water-phase preparation method of ZnSe:Ag quantum dots, belonging to the technical field of composite nano microcrystal materials. The preparation method comprises the following steps: reacting sodium borohydride (NaBH4) and selenium powder to prepare sodium hydrogen selenide (NaHSe), and injecting the sodium hydrogen selenide into a zinc nitrate / 3-mercaptopropionic acid solution of which the pH value is regulated by sodium hydroxide so as to react, thereby obtaining a light-brown transparent ZnSe:Ag quantum dot solution. 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 water-phase preparation method of ZnSe:Ag quantum dots, belonging 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] To realize the wide application of ZnSe in optoelectronic and biological fields, it is necessary to obtain ZnSe materials with high quantum yield and stable luminescence. Zn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88
Inventor 李冬梅王刚唐世弋程经纬程涛
Owner SHANGHAI UNIV
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