Hexagonal radial photonic crystal film without obvious defects and preparation method thereof

A technology of obvious defects and photonic crystals, applied in optics, optical components, instruments, etc., can solve problems such as low efficiency, long time consumption, limited application, etc., and achieve the effect of reducing defects and improving stress defects

Active Publication Date: 2021-02-02
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Hexagonal radial photonic crystal film without obvious defects and preparation method thereof
  • Hexagonal radial photonic crystal film without obvious defects and preparation method thereof
  • Hexagonal radial photonic crystal film without obvious defects and preparation method thereof

Examples

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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 preparation method comprises the following steps: preparing a super-hydrophobic substrate, placing an O-shaped sealing ring on the super-hydrophobic substrate, and then adding a suspension containing colloidal microspheres and a binder into the O-shaped sealing ring until the O-shaped sealing ring is fully paved with the suspension and the suspension does not overflow; carrying out the drying treatment, and after the solvent is completely volatilized, obtaining the hexagonal radial photonic crystal film without obvious defects. By means of the mode, the colloidal microspheres can be closely stacked and arranged under the synergistic effect of the super-hydrophobic substrate and the O-shaped sealing ring with the limiting effect, on this basis, the stress defect generated when the colloidal microspheres are assembled is further overcome through the binder, and therefore the hexagonal radial photonic crystal film without obvious defects is formed. And the whole preparation process is simple to operate, consumes less time, is lower in cost, can meet the requirements of actual production and application, and has better application prospects.

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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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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