Preparation method of photonic crystal microspheres based on multi-shell nanoparticles

A technology for photonic crystal microspheres and nanoparticles, which is used in the preparation of microspheres, biochemical equipment and methods, nanotechnology for materials and surface science, etc. problem, to achieve the effects of excellent color contrast and brightness, simple preparation method, and high biomedical research value

Active Publication Date: 2020-06-30
NANJING DRUM TOWER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the traditional photonic crystal microsphere structure, such as poor color brightness and contrast, and cumbersome

Method used

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  • Preparation method of photonic crystal microspheres based on multi-shell nanoparticles
  • Preparation method of photonic crystal microspheres based on multi-shell nanoparticles
  • Preparation method of photonic crystal microspheres based on multi-shell nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Construction of photonic crystal microspheres based on graphene oxide (GO) and polydopamine (PDA)-wrapped multi-shelled silica nanoparticles and structural color comparison of photonic crystal microspheres with different nanoparticle compositions

[0032] 1. Preparation of PDA-wrapped silica nanoparticles: prepare the washed unmodified silica nanoparticles into a dispersion with a concentration of 0.1g / mL; the total volume of the entire reaction system in this step is 10mL, including 5mL concentration Tris base of 0.1mol / L, 1.47mL of hydrochloric acid with a concentration of 0.1mol / L, 2mL of silica nanoparticle dispersion, and the rest is dopamine solution (to ensure that the dosage of dopamine in the entire system is 20mg). Put 10mL of the mixed solution in a glass bottle, and place the whole system on a magnetic stirrer to mix and react for 10h. During the reaction, it can be observed that the originally clear and transparent reaction system turns into a dark gray opaq...

Embodiment 2

[0038] Based on molybdenum disulfide (MoS 2 ) and polydopamine (PDA)-wrapped multi-shell polystyrene (PS) nanoparticles to construct photonic crystal microspheres

[0039]1. Preparation of PDA-wrapped PS nanoparticles: Prepare the washed unmodified PS nanoparticles into a dispersion with a concentration of 0.1g / mL; the total volume of the entire reaction system in this step is 10mL, including 5mL with a concentration of 0.1mol / mL L of Trisbase, 1.47 mL of hydrochloric acid with a concentration of 0.1 mol / L, 2 mL of PS nanoparticle dispersion, and the rest of the dopamine solution (to ensure that the amount of dopamine in the entire system is 20 mg). Put 10mL of the mixed solution in a glass bottle, and place the whole system on a magnetic stirrer to mix and react for 8 hours. During the reaction, it can be observed that the originally clear and transparent reaction system turns into a dark gray opaque solution; , take out the reaction system, centrifuge at 7000rpm, and remove...

Embodiment 3

[0044] Photonic crystal microspheres based on GO and PDA-wrapped silica nanoparticles are used for multiple detection of nucleic acids (the principle of nucleic acid detection is as follows: Figure 5 shown)

[0045] 1. Select unmodified silica nanoparticles (260nm, 230nm, 200nm) of three different particle sizes, and make photonic crystal microspheres (red, green, blue) of three different colors according to the method in example 1.

[0046] 2. Coupling photonic crystal microspheres of three different colors with three different probes (red-probe 1, green-probe 2, blue-probe 3), the coupling method is as follows : Thoroughly wash the photonic crystal microspheres with PBS buffer, and then incubate the microspheres with the ten-fold diluted probe solution for 6 hours. cleaning.

[0047] 3. Divide the probe-coupled photonic crystal microspheres into three groups, and each group contains a certain number of red, green and blue microspheres; in the first group, three kinds of p...

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Abstract

The invention relates to a preparation method of photonic crystal microspheres based on multi-shell nanoparticles. The photonic crystal microspheres are formed by self-assembly of the multi-shell nanoparticles. According to the preparation method of the multi-shell nanoparticles, under the assistance of an adhesive polymer material, the surface of original unmodified nanoparticles is coated with amaterial with light absorption capacity, and the multi-shell nanoparticles encapsulated layer by layer are obtained through multiple times of repeated operation. Under the assistance of an adhesive material, the peripheries of the original unmodified nanoparticles are coated with a light absorption material layer by layer to obtain the multi-shell nanoparticles, so that the photonic crystal microspheres composed of the nanoparticles have optimized structural color. The method disclosed by the invention is simple, controllable in parameters and high in repeatability, and has great applicationprospects in the fields of biochemical detection, counterfeiting prevention, cell capture and the like.

Description

technical field [0001] The invention relates to the field of biological materials, in particular to a method for preparing photonic crystal microspheres based on multi-shell nanoparticles. Background technique [0002] Structural color is a special source of color in nature. The production of structural color has nothing to do with pigment coloring, it is an optical effect caused by the micro-nano structure of biological characteristics, this special color is very common in nature, such as bird feathers, butterfly wings, insect shells, etc. . Since the production of structural color depends on the inherent structure of the object itself, as time goes by, structural color will not fade like ordinary pigments. These phenomena have attracted a large number of researchers to carry out a lot of research on structural color, and more and more artificial structural color materials have been developed. Among them, spherical structural color materials, that is, photonic crystal mi...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/06C09C3/10C09B67/02B82Y30/00B82Y40/00B01J13/02C09K3/00C12Q1/682G01N21/64
CPCB01J13/02B82Y30/00B82Y40/00C09B67/0097C09B67/0098C09C1/0015C09C1/28C09C3/006C09C3/063C09C3/10C09K3/00C12Q1/682G01N21/6428G01N21/643C12Q2563/107C12Q2563/149
Inventor 赵远锦刘羽霄王月桐
Owner NANJING DRUM TOWER HOSPITAL
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