Microfluidic-control preparation method for microsphere of polymethylmethacrylate-coated cadmium telluride (CdTe) quantum dot

A technology of polymethyl methacrylate and quantum dots, which is applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of quantum dot dissolution, etc., and achieve the effect of simple preparation method, long fluorescence lifetime and uniform shape

Inactive Publication Date: 2012-06-20
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem that the existing preparation method of microbeads coated with CdTe quantum dots needs to modify the surface of quantum dots and the microbead

Method used

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  • Microfluidic-control preparation method for microsphere of polymethylmethacrylate-coated cadmium telluride (CdTe) quantum dot
  • Microfluidic-control preparation method for microsphere of polymethylmethacrylate-coated cadmium telluride (CdTe) quantum dot
  • Microfluidic-control preparation method for microsphere of polymethylmethacrylate-coated cadmium telluride (CdTe) quantum dot

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Experimental program
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Example Embodiment

[0017] Specific embodiment 1: The microfluidic control preparation method of polymethyl methacrylate encapsulated CdTe quantum dot microbeads of this embodiment is carried out in the following steps:

[0018] 1. Preparation of sodium tellurium hydride: According to the mass-volume ratio of sodium borohydride and water of 1g:83mL~84mL, the molar ratio of sodium borohydride to tellurium powder is 1:2.1, respectively weigh the sodium borohydride and the temperature is 0℃~ 5℃ cold water and tellurium powder, first add sodium borohydride to the container, and put the container on the ice water bath, then add the weighed cold water, then add the weighed tellurium powder, stir for 10h-12h, get tellurium hydrogenation Sodium solution

[0019] 2. Preparation of cadmium telluride quantum dots: a. According to the mass-volume ratio of cadmium hydroxide and N,N-dimethylformamide of 1g:285mL~290mL, the mass-volume ratio of cadmium hydroxide and lactic acid is 1g:1.5 mL~1.6mL, the mass-volume r...

Example Embodiment

[0025] Embodiment 2: The difference between this embodiment and the first embodiment is that the temperature of the cold water in step one is 1°C to 4°C. Others are the same as the first embodiment.

Example Embodiment

[0026] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the stirring time in step one is 10.5h to 11.5h. Others are the same as the first embodiment.

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Abstract

The invention relates to a microfluidic-control preparation method for a microsphere of a polymethylmethacrylate-coated cadmium telluride (CdTe) quantum dot, and relates to a preparation method for the microsphere of a polymethylmethacrylate-coated CdTe quantum dot. The microfluidic-control preparation method for the microsphere of the polymethylmethacrylate-coated (CdTe) quantum dot aims to solve the problems that the surface of the quantum dot needs to be modified and the quantum dot is easy to dissolve by the microsphere of the polymethylmethacrylate-coated CdTe quantum dot by adopting a traditional preparation method for the microsphere of the polymethylmethacrylate-coated CdTe quantum dot. The method comprises the following steps: preparing a sodium hydrogen telluride solution; preparing a CdTe quantum dot; preparing a polymer solution; connecting a microfluidic-control system; respectively putting the polymer solution and silicone oil into injectors A and B of the microfluidic-control system; setting the propulsion speed of the injectors A and B; after starting, formed liquid beads flow into a rotary evaporator; and curing and evaporating the silicone oil to obtain the microsphere of the polymethylmethacrylate-coated CdTe quantum dot. In the microfluidic-control preparation method for the polymethylmethacrylate-coated CdTe quantum dot, the polymethylmethacrylate-coated CdTe quantum dot is selected, therefore, fluorescence is stable, and the microsphere can be adjusted in size and can be used for field of fluorescent display and the like.

Description

technical field [0001] The invention relates to a preparation method of microbeads wrapped with CdTe quantum dots. Background technique [0002] Quantum dots, also known as nanocrystals, have quantum size effects, quantum confinement effects, surface effects, small size effects, and macroscopic quantum tunneling effects, and have great application prospects. Especially CdTe quantum dots. CdTe quantum dots have high luminous efficiency and strong photoelectric stability, and can change the color from blue light to red light in the visible light region by changing the size of the nanocrystals. Exhibiting excellent properties, it is widely used in the fields of biomedicine, optical coding and luminescent materials. However, due to the size of quantum dots ranging from 1 to 100 nm, the volume is small, the specific surface area is large, and the surface energy is high, so the stability is not good, easy to agglomerate, and the fluorescence characteristics are easily quenched b...

Claims

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Application Information

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IPC IPC(8): C09K11/88C09K11/02
Inventor 孙立国赵冬梅汪成栾羽佳王明强曹晓俭韩春华
Owner HEILONGJIANG UNIV
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