A hexagonal radial photonic crystal film without obvious defects and its preparation method

A technology of photonic crystals and obvious defects, applied in optics, optical components, instruments, etc., can solve the problems of long time consumption, low efficiency, and the inability of photonic crystals to show hexagonal radial structural color, etc., to improve stress defects , the effect of reducing defects

Active Publication Date: 2022-02-18
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this method, the deposition process of monodisperse microspheres using their own gravity takes a long time, and the efficiency is low; moreover, the photonic crystals prepared by this method cannot exhibit hexagonal radial structural color, which makes its application restricted

Method used

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  • A hexagonal radial photonic crystal film without obvious defects and its preparation method
  • A hexagonal radial photonic crystal film without obvious defects and its preparation method
  • A hexagonal radial photonic crystal film without obvious defects and its preparation method

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preparation example Construction

[0032] The invention provides a method for preparing a hexagonal radial photonic crystal film without obvious defects, comprising the following steps:

[0033] S1, preparing a superhydrophobic substrate;

[0034] S2, uniformly dispersing the colloidal microspheres and the binder in the solvent to make a suspension;

[0035] S3. Place the O-shaped sealing ring on the super-hydrophobic substrate obtained in step S1, so that the O-shaped sealing ring and the super-hydrophobic substrate are closely attached; then add the suspension obtained in step S2 to the In the O-shaped sealing ring, until the suspension is covered with the O-shaped sealing ring without overflowing; after the solvent is completely volatilized through drying treatment, a hexagonal radial photonic crystal film without obvious defects is obtained.

[0036] In step S1, the preparation method of the superhydrophobic substrate is: uniformly apply the polyurethane solution containing hydrophobic silicon dioxide part...

Embodiment 1

[0042] This embodiment provides a method for preparing a hexagonal radial photonic crystal film without obvious defects, comprising the following steps:

[0043] S1. Preparation of superhydrophobic substrate

[0044] Using the spraying method, spray the polyurethane solution containing 1wt% hydrophobic silica particles evenly on a clean glass slide, and place it in a drying oven at 80°C for 12 hours to obtain a contact angle with water of 152±1° superhydrophobic substrates.

[0045] S2, prepare the suspension containing colloidal particles and binder

[0046] Silica colloidal microparticles with a particle diameter of 200nm and binder polyvinylpyrrolidone with a molecular weight of 20,000 were respectively added to water, and after being fully dispersed, a suspension containing silica colloidal microparticles and polyvinylpyrrolidone was obtained. In the suspension, the mass fraction of silica colloidal particles is 1%, and the mass fraction of polyvinylpyrrolidone is 0.1%. ...

Embodiment 2～4

[0050] Embodiments 2 to 4 respectively provide a method for preparing a hexagonal radial photonic crystal film without obvious defects. Compared with Embodiment 1, the difference is that the silica colloidal microspheres used in step S2 are changed. Particle diameters, the particle diameters of the silica colloidal microspheres corresponding to Examples 2-4 are 250nm, 320nm and 450nm in sequence, and the rest of the steps are consistent with those of Example 1, and will not be repeated here.

[0051] The hexagonal radial photonic crystal film prepared in Examples 1 to 4 without obvious defects was observed under light source irradiation, and the top view and the side view at 45° were as follows: figure 2 , image 3 shown. in, figure 2 , image 3 Each sample in the table represents Examples 1-4 from left to right. combine figure 2 and image 3 It can be seen that the surface of the photonic crystal film prepared in each embodiment has no obvious defects, and it is clos...

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Abstract

The invention provides a hexagonal radial photonic crystal film without obvious defects and a preparation method thereof. The present invention prepares a super-hydrophobic substrate, and places an O-shaped sealing ring on the super-hydrophobic substrate, and then adds a suspension containing colloidal microspheres and a binder into the O-shaped sealing ring until the suspension is covered with the O-shaped sealing ring. No spillage; further drying treatment, after the solvent is completely volatilized, a hexagonal radial photonic crystal film without obvious defects is obtained. Through the above method, the present invention can make the colloidal microspheres tightly packed and arranged under the synergistic effect of the superhydrophobic substrate and the O-shaped sealing ring with confinement effect, and on this basis, the binder is used to further improve the colloidal microspheres assembly. Stress defects, thereby forming a hexagonal radial photonic crystal film without obvious defects; and the overall preparation process is simple, time-consuming, and low-cost, which can meet the needs of actual production and application, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of photonic crystal preparation, in particular to a hexagonal radial photonic crystal film without obvious defects and a preparation method thereof. Background technique [0002] Photonic crystals are artificial microstructures that are periodically arranged by media with different refractive indices. Its unique photonic bandgap can shield specific frequencies of light from propagating in its structure, allowing these specific frequencies of light to interact with photonic crystal structures. , refraction, diffuse reflection, coherent diffraction, and finally form a bright structural color visible to the naked eye. Compared with pigment colors, structural colors formed by photonic crystals have the advantages of bright colors, never fading, and environmental friendliness, and have broad application prospects in the fields of optical devices, display equipment, textiles, and coatings. [0003] At present, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00
CPCG02B1/005
Inventor 王栋武艺刘轲徐桂林夏明卿星
Owner WUHAN TEXTILE UNIV
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