Method of preparing CdTe/CdS/ZnS core-shell-core structure quantum points

A quantum dot and shell structure technology, applied in chemical instruments and methods, material inspection products, luminescent materials, etc., to achieve the effects of safe operation, easy availability of raw materials, excellent photostability and biocompatibility
CN101077976AInactive Publication Date: 2007-11-28FUDAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUDAN UNIV
Publication Date
2007-11-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention belongs to the field of nanometer material and biological analysis and detection technology, and is especially preparation process of water soluble CdTe / CdS / ZnS quantum dot in core-shell-shell structure. The preparation process includes mixing zinc salt or zinc oxide with water soluble sulfhydryl compound in water phase, injecting prepared solution of CdTe / CdS in core-shell structure to obtain CdTe / CdS / ZnS precursor solution, setting the precursor solution in a glass tube and performing microwave radiation reaction in a microwave reactor to obtain CdTe / CdS / ZnS quantum dot in core-shell-shell structure. The process is completed in water phase, and is safe and simple. The CdTe / CdS / ZnS quantum dot in core-shell-shell structure has high fluorescence quantum efficiency, high water solubility, excellent stability and high biocompatibility, and may be applied widely in fluorescent marker for biological analysis and detection.
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Description

technical field

[0001] The invention belongs to the field of nanomaterial preparation technology and biological analysis and detection technology, and in particular relates to a preparation method of water-soluble CdTe / CdS / ZnS core-shell-shell structure quantum dots with high fluorescence quantum efficiency. Using cadmium salt (or its oxide, hydroxide), zinc salt (or its oxide), sodium hydride tellurium (or potassium hydride tellurium, tellurium powder) and sodium sulfide (or potassium sulfide) as raw materials, using microwave technology Preparation of CdTe / CdS / ZnS core-shell-shell quantum dots. Background technique

[0002] Quantum dots are a type of semiconductor nanocrystal grains composed of II-VI or III-V elements whose radius is smaller than or close to the exciton Bohr radius. Quantum dots have unique quantum size effects and surface effects. Compared with traditional fluorescent dye molecules using nanocrystals as markers, they have many advantages: nanocrystals ha...

Claims

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