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Photonic crystal microsphere as well as preparation method and application thereof

A technology of photonic crystal microspheres and photonic crystals, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of low resolution of encoded signals, poor stability of photonic crystal microspheres, and not bright colors, etc., and achieve bright color development , shorten the preparation cycle, and reduce the time required for coding

Active Publication Date: 2014-12-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a photonic crystal microsphere, its preparation method and application, the purpose of which is to provide a stable , Brightly colored and highly recognizable photonic crystal microspheres, thereby solving the technical problems of poor stability of existing photonic crystal microspheres, not bright colors, and low resolution of encoding signals

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  • Photonic crystal microsphere as well as preparation method and application thereof
  • Photonic crystal microsphere as well as preparation method and application thereof
  • Photonic crystal microsphere as well as preparation method and application thereof

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preparation example Construction

[0036] The preparation method of the photonic crystal microsphere provided by the invention comprises the following steps:

[0037] (1) Preparation of photonic crystal core material: uniformly mix styrene, N-isopropylacrylamide, surfactant (sodium lauryl sulfate) and initiator, and emulsion polymerization occurs at 60°C to 80°C for 5 Hours to 10 hours, the polystyrene-poly(N-isopropylacrylamide) copolymer nanoparticle suspension is prepared, and its mass fraction is 10% to 50%. The mass ratio of the styrene, N-isopropylacrylamide, sodium dodecylsulfonate and initiator is 10-20:0.1-1:1.6-2.6:0.01-0.09. The photoinitiator is preferably potassium persulfate. Wherein the consumption of sodium dodecyl sulfonate can control the average particle diameter of polystyrene-poly(N-isopropylacrylamide) copolymer nanoparticles.

[0038] (2) Preparation of photonic crystal microsphere precursor: adopting microfluidic technology, with the polystyrene-poly(N-isopropylacrylamide) copolymer na...

Embodiment 1

[0045] Embodiment 1 blue photonic crystal microsphere and its preparation

[0046] A blue photonic crystal microsphere, comprising a photonic crystal core and a photopolymer shell, see figure 2 A; The core diameter of the photonic crystal is 270 μm, which is a polystyrene-poly(N-isopropylacrylamide) copolymer nanoparticle suspension, and the polystyrene-poly(N-isopropylacrylamide) copolymer The average particle size of the nanoparticle is 110nm; the photopolymer shell is a hydrophobic photoinitiated resin with a thickness of 30μm. The hydrophobic resin is ethoxylated trimethylolpropane triacrylate containing 1% by mass of acrylate.

[0047] Described blue photonic crystal microsphere, its preparation method, comprises the following steps:

[0048] (1) Preparation of photonic crystal core material: uniformly mix styrene, N-isopropylacrylamide and initiator, and undergo emulsion polymerization for 5 hours at 60°C to obtain the polystyrene-polyisopropylpropylene Amide copolym...

Embodiment 2

[0052] Embodiment 2 green photonic crystal microsphere and its preparation

[0053] A green photonic crystal microsphere, comprising a photonic crystal core and a photopolymer shell; the photonic crystal core diameter is 280 μm, which is polystyrene-poly(N-isopropylacrylamide) copolymer nanoparticle suspension, the The average particle size of the polystyrene-poly(N-isopropylacrylamide) copolymer nanoparticles is 140nm, the photopolymer shell is a hydrophobic photoinitiating resin, and the thickness is between 40μm. The hydrophobic resin is ethoxylated trimethylolpropane triacrylate containing 1% by mass of acrylate.

[0054] Described green photonic crystal microsphere, its preparation method, comprises the following steps:

[0055] (1) Preparation of photonic crystal core material: uniformly mix styrene, N-isopropylacrylamide and initiator, and undergo emulsion polymerization for 6 hours at 70°C to obtain the polystyrene-poly(N-isopropylacrylamide) Propylacrylamide) copoly...

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Abstract

The invention discloses a photonic crystal microsphere as well as a preparation method and an application thereof. The photonic crystal microsphere comprises a photonic crystal inner core and a polymer outer shell, wherein the inner core is a suspension of polystyrene-poly(N-isopropyl acrylamide)polymer nanoparticles, the average particle diameter of the nanoparticles is between 110nm and 190nm; and the outer shell is hydrophobic photoinitiator resin of which the thickness is between 30mu m and 50 mu m. The preparation method comprises the following steps: (1) evenly mixing styrene, N-isopropyl acrylamide and sodium dodecyl sulfate with an initiator and carrying out emulsion polymerization reaction to obtain the suspension; (2) forming monodispersed emulsion droplets with core-shell structures under the action of the shearing force of an aqueous solution of a continuous phase by virtue of a microfluidic control technique, wherein the suspension is adopted as an internal phase, the resin monomer and an initiator system are adopted as intermediate phases; and (3) polymerizing and curing the resin monomer by virtue of UV irradiation. The photonic crystal microsphere is applied in bio-molecule detection and coding and has the advantages of good stability, bright color and high recognition.

Description

technical field [0001] The invention belongs to the field of photonic crystals, and more specifically relates to a photonic crystal microsphere, its preparation method and application. Background technique [0002] Photonic crystals are a periodic structure composed of materials with different refractive indices alternating in space. Due to their unique optical properties, photonic crystals are widely used in the preparation of various optical devices such as modulators, sensors, and displays; in addition, they also play an important role in clinical diagnosis, gene analysis, drug screening, and multivariate analysis. [0003] Multiplex detection analysis is the simultaneous analysis of a huge number of different molecules to be detected. Therefore, it is necessary to encode the probe molecules corresponding to different molecules to be detected, so as to realize the analysis and tracking of the molecules to be detected. At present, there are mainly two types of encoding v...

Claims

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Application Information

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IPC IPC(8): C08F265/10C08F212/08C08F220/54C08F222/20C08F2/48G01N21/64
Inventor 朱锦涛贾晓潞王建颖
Owner HUAZHONG UNIV OF SCI & TECH
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