Preparation method of water soluble manganese added zinc sulfide nano-crystalline with high fluorescence efficiency

Abstract

The present invention is the preparation process of nanometer ZnS:Mn crystal with high fluorescent efficiency and high water solubility and belongs to the field of nanometer material preparing technology. After the water soluble nanometer ZnS:Mn crystal precursor synthesized through co-precipitation process and one kind of zinc mercapto complex are set inside microwave reactor, the zinc mercapto complex is decomposed under microwave heating condition and one layer of zinc sulfide is grown on the surface of the ZnS:Mn crystal precursor, so as to improve the dispersion state of Mn ions inside nanometer ZnS crystal and obtain nanometer ZnS:Mn crystal with high fluorescent efficiency. The process has simple operation and mild reaction condition, and the synthesized nanometer ZnS:Mn crystal has excellent water solubility and relatively high fluorescent quantum efficiency.

Description

technical field

[0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing water-soluble manganese-doped zinc sulfide nanocrystals by using microwave-assisted synthesis technology. Background technique

[0002] In the past ten years, the application of fluorescent nanocrystals in biomarkers has attracted more and more attention. Compared with traditional organic dyes, fluorescent nanocrystals have better optical properties. Its excitation wavelength is wider and its emission wavelength is narrower, which is convenient for multi-index joint detection of fluorescence; it has high quantum yield and strong anti-light Oxidation and photobleaching ability. Connecting nanocrystals with biomacromolecules to form bioluminescent probes has broad application prospects in biotechnology fields such as immunoassays, fluorescence imaging of living tissues, clinical diagnosis, and drug screening.

[0003] In 1994, N...