Method for preparing cadmium selenide quantum dots by using microbial cells

Abstract

The invention discloses a synthesizing method of cadmium selenide quantum point through microbe cell, which comprises the following steps: A. A. preparing microbe cell; B. selenidizing the microbe cell; C. cadmating the cell to culture continuously; D. extracting CdSe quantum point from cell; E. purifying the CdSe quantum point. The invention simplifies the operation without organic metal compound and inert gas to protect, which is beneficial to do industrialization synthesis of nanometer particle (quantum point).

Description

technical field [0001] The invention belongs to the fields of nanoscience, microbiology and material synthesis, and in particular relates to a method for preparing cadmium selenide (CdSe) quantum dots by utilizing microbial cells. Background technique [0002] Quantum dots (Quantum Dots, QDs) generally refer to semiconductor nanocrystals with a radius smaller than or close to the exciton Bohr radius. They have unique fluorescent nano-effects, such as wide excitation spectrum and continuous distribution, narrow and symmetrical emission spectrum, and luminescence wavelength can be adjusted by changing particle size and composition, strong fluorescence intensity, slow bleaching rate, and high sensitivity, so nearly ten It has aroused people's widespread attention in recent years, and has broad application prospects in luminescent materials, photocatalysis, photosensitive sensors, and fluorescent probe labeling. In particular, quantum dots composed of group IIB and VIA elements...

AI Technical Summary

Problems solved by technology

Heating with microwave radiation is simple and fast to operate, but some microwave phenomena such as non-thermal effect and superthermal effect are not well understood by people, which affect the uniformity and other properties of the product.

[0007] Among the various methods mentioned above, although the pollution of the inorganic synthesis route is relatively small, there are problems such as product uniformity and particle size to a certain extent; Compound-element organic synthesis route, although inorganic compounds such as CdO, Cd(Ac)2 can be used to prepare high-quality bare quantum dots, but the preparation of core / shell structure quantum dots commonly used Basically still use organometallic compounds such as Cd(CH3)2, Zn(CH3)2 Therefore, it will undoubtedly be of great importance if these methods can be improved, and raw materials with low price and stable properties can be selected to prepare core / shell structure quantum dots under relatively safe and mild conditions. significance

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