Quantum dot purification method
A purification method and quantum dot technology, applied in the field of quantum dots, can solve the problems of unsatisfactory purification effect of the purification method, and achieve the effect of easy operation, simple and fast process
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Embodiment 1
[0038] A method for purifying silicon quantum dots, comprising the steps of:
[0039] (1) Provide 1.5 g of silicon quantum dot solution.
[0040] (2) At 25 degrees Celsius, first dissolve 1.5 mg of tetramethylammonium hydroxide in 1.5 ml of absolute ethanol, then add 1 mg of Escherichia coli circular DNA, and shake to obtain a weakly alkaline E. coli ring ethanol solution of DNA. After the silicon quantum dot solution was ultrasonically oscillated for 30 minutes, it was added to the ethanol solution of the above-mentioned weakly alkaline E. coli circular DNA, and the solution was rapidly cooled to 5 degrees Celsius. The E. coli circular DNA would naturally shrink and coat the surface of the silicon quantum dots. Fluorescence of the quantum dots was detected with a fluorometer, and it was determined that the fluorescence intensity was quenched by more than 70%.
[0041] (3) The above 1.5 mg of quantum dots coated with Escherichia coli circular DNA and 1.5 mg of lubricant pent...
Embodiment 2
[0044] A method for purifying organic-inorganic perovskite quantum dots, comprising the steps of:
[0045] (1) Provide organic-inorganic perovskite quantum dot solution mass 25g.
[0046] (2) Under the condition of 25 degrees Celsius, first dissolve 1.8g of tetramethylammonium hydroxide in 90ml of absolute ethanol, then add 9mg of yeast linear DNA, shake well and obtain weak alkaline yeast linear DNA ethanol solution of DNA. The organic-inorganic perovskite quantum dot solution was ultrasonically oscillated for 20 minutes, and then added to the ethanol solution of the above-mentioned weakly alkaline yeast linear DNA, and the solution was quickly cooled to 5 degrees Celsius, and the yeast linear DNA would naturally shrink and wrap on the Organic-inorganic perovskite quantum dot surfaces. Fluorescence of the quantum dots was detected with a fluorometer, and it was determined that the fluorescence intensity was quenched by more than 70%.
[0047] (3) 9 mg of quantum dots coate...
Embodiment 3
[0050] A method for purifying CdS@ZnSe alloy quantum dots, comprising the steps of:
[0051] (1) Provide a CdS@ZnSe alloy quantum dot solution, where the quantum dot mass is 10g.
[0052] (2) Under the condition of 25 degrees Celsius, first dissolve 1.4g of tetramethylammonium hydroxide in 40ml of absolute ethanol, then add 4mg of Proteus plasmid DNA, and shake to obtain weakly alkaline Proteus plasmid DNA. weak. The CdS@ZnSe alloy quantum dot solution was ultrasonically oscillated for 20 minutes and then added to the ethanol solution of the weakly alkaline Proteus plasmid DNA, and the solution was rapidly cooled to 10 degrees Celsius, and the Proteus plasmid DNA would naturally shrink and coat the CdS@ZnSe alloy. quantum dot surface. Fluorescence of the quantum dots was detected with a fluorometer, and it was determined that the fluorescence intensity was quenched by more than 70%.
[0053] (3) The above 4 mg of quantum dots coated with Proteus plasmid DNA and 0.8 mg of lu...
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