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Method for preparing shell fluorescent microsphere

A technology of fluorescent microspheres and shell layers, which is applied in the preparation of microspheres, microcapsule preparations, chemical instruments and methods, etc., can solve the problems of difficult adjustment of size, uneven diameter, etc., and achieves good solubility, simplified preparation process, The effect of good chemical stability

Inactive Publication Date: 2012-07-25
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of shell fluorescent microspheres in order to solve the problems of non-uniform diameter and difficult size regulation of existing silica shell photonic crystal microspheres

Method used

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  • Method for preparing shell fluorescent microsphere
  • Method for preparing shell fluorescent microsphere
  • Method for preparing shell fluorescent microsphere

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specific Embodiment approach 1

[0029] Specific embodiment one: the preparation method of a kind of shell fluorescent microsphere of the present embodiment is carried out according to the following steps:

[0030] 1. Preparation of CdTe quantum dots by aqueous phase synthesis method;

[0031] Two, utilize soap-free emulsion method to prepare polystyrene (PS) ball;

[0032] 3. Weigh 155 to 165 parts of absolute ethanol, 2 to 6 parts of polystyrene balls made in step 2, 2 to 4 parts of ammonia water and 30 to 40 parts of polystyrene balls made in step 1 according to the ratio of parts by volume. Add CdTe quantum dots into a three-necked flask, and stir for 4-6 minutes to obtain a mixture C;

[0033] 4. Weigh 6-7 parts of ethyl orthosilicate and 10-15 parts of absolute ethanol according to the ratio of parts by volume, and mix them evenly at room temperature to obtain the mixed solution E; ~0.8 parts of ammonia water, 10~14 parts of absolute ethanol and 7~7.5 parts of water are mixed uniformly at room tempera...

specific Embodiment approach 2

[0035] Embodiment 2: This embodiment is different from Embodiment 1 in that: the diameter of the CdTe quantum dots described in Step 1 is 2-5 nm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0036] Embodiment 3: This embodiment differs from Embodiments 1 to 2 in that: the diameter of the polystyrene sphere described in Step 2 is 180-220 nm. Other steps and parameters are the same as those in Embodiments 1 to 2.

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Abstract

The invention relates to a method for preparing a shell fluorescent microsphere, relates to the preparation method of a fluorescent microsphere, and mainly aims to solve the problems that the diameter of a photonic crystal microsphere of the existing silicon dioxide shell is not uniform, and the size of the photonic crystal microsphere of the existing silicon dioxide shell is difficult to regulate. The method for preparing the shell fluorescent microsphere comprises the following steps of: firstly synthesizing CdTe quantum dots with different diameters through an aqueous phase method, preparing polystyrene spheres with different diameters by utilizing a soap-free emulsion method, coating the quantum dots with the different diameters in a SiO2 grain by taking the polystyrene spheres with the different diameters as seeds, finally dissolving SiO2 microspheres coated with the quantum points by taking the polystyrene spheres as seeds or calcining to remove the polystyrene spheres, namely obtaining PS@SiO2&CdTe fluorescent microspheres. According to the method for preparing the shell fluorescent microsphere, disclosed by the invention, the condition is simple and easily controlled, and the prepared fluorescent microsphere has excellent chemical stability and stronger fluorescence characteristic, controllable size and uniform diameter. The method for preparing the shell fluorescent microsphere is applied to the field of preparation of the shell fluorescent microsphere.

Description

technical field [0001] The invention relates to a preparation method of fluorescent microspheres. Background technique [0002] Due to a series of optoelectronic properties caused by the quantum size effect, II-VI semiconductor nanoparticles (quantum dots) have shown unique charm as novel fluorescent markers in various biochemical studies, and have attracted extensive attention in recent years. In particular, water-soluble cadmium telluride (CdTe) quantum dots have shown extremely broad application prospects in the research fields of biochemistry, cell biology, and molecular biology. However, the surface of the currently synthesized water-soluble CdTe quantum dots needs to undergo anti-oxidation treatment. Rogach used the method of aqueous phase synthesis to directly obtain water-soluble CdTe quantum dots coated with thioglycolic acid on the surface. However, due to the instability of thioglycolic acid, the above-mentioned quantum dots are easily degraded. Moreover, quantu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C09K11/88C08F212/08C08F220/06C08F2/22
Inventor 孙立国赵冬梅王明强汪成张艳红吕莉丽
Owner HEILONGJIANG UNIV
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