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

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.

Preparation method of water soluble CdTe/CdS nuclear/shell type quantum point

Nucleus-shell-shell structured quantum dot with high fluorescence quantum efficiency and method of producing the same

The invention belongs to the technical field of nano material and biological analysis detection, and particularly discloses a method for preparing a high fluorescence quantum efficiency water soluble CdTe/CdS/Zns core-shell-shell structure quantum point by microwave. In water phase, zinc salt or zinc oxide is mixed with a water soluble sulfhydryl compound, and injected with pre-prepared CdTe/CdS core-shell structure quantum point solution to obtain CdTe/CdS/Zns precursor solution, and the precursor solution is placed in a glass pipe specially used for microwave radiation and subjected to microwave radiation reaction in a microwave reactor to obtain the CdTe/CdS/Zns core-shell-shell structure quantum point. The method is completely performed in the water phase, and is safe and convenient to operation. The obtain product has the advantages of high fluorescence quantum efficiency, good water solubility and excellent stability and biocompatibility, and can be widely applied to fluorescence ...

Method for preparing CdTe quantum dots in aqueous phase and at low temperature

The invention belongs to the field of preparation of nano materials and relates to a method for preparing CdTe quantum dots in an aqueous phase and at a low temperature. The method comprises the following steps of: preparing solution from dithioamino formate serving as a stabilizing agent, water serving as a solvent, cadmium salt and a ligand according to a certain ratio; injecting sodium hydrogen telluride or potassium hydrogen telluride aqueous solution; and reacting in water bath at the low temperature for a certain time to obtain the water dispersible CdTe quantum dots. The preparation method has the advantages of low reaction temperature, readily available raw materials, convenience of preparation, easiness in operation, low requirement on reaction equipment, low price, energy conservation, environmental friendliness, preparation on a large scale and suitability for industrialization because the CdTe quantum dots are prepared in the aqueous phase completely. The prepared CdTe quantum ...

Microwave preparation method of water soluble ZnSe quantum dots

The invention discloses a microwave preparation method of water soluble ZnSe quantum dots, which comprises the following steps: (1) mixing solution of sodium hydrogen selenide with solution serving as a zinc source to obtain solution of ZnSe precursor; and (2) heating the solution of the ZnSe precursor by microwaves to obtain water soluble ZnSe quantum dots, wherein the microwave heating conditions include a microwave power of 50 to 300W, a heating time period of 1 to 30 minutes and a heating temperature of 70 to 120 DEG C and the solution serving as the zinc source may be solution of a zinc salt, zinc oxide or zinc hydroxide. The obtained high fluorescent quantum product has high yield, stability and water solubility and can be widely used for making fluorescent labels for biological detection and analysis.