Preparation method for non-close-packed opal photonic crystal

A technology of photonic crystals and opals, applied in the field of preparation of non-close-packed opal photonic crystals, can solve the problems of simple preparation process equipment, difficult polymerization reaction, and less stretchable materials, and achieve stable process control, simple production process, and simple equipment Effect

Inactive Publication Date: 2012-06-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods for preparing non-close-packed photonic crystals mainly include microfabrication and self-assembly methods. The microfabrication method can prepare various photonic crystal structures, but the cycle is long and the cost is high; while the structure prepared by the self-assembly method is relatively simple, but its The preparation process equipment is simple, the cycle is short, and the cost is low
In the self-assembly method, there are currently three main methods: (1) disperse monodisperse microspheres in a polymerizable polymer monomer solution for polymerization, and the polymerization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a non-close-packed opal photonic crystal, comprising the following steps:

[0026] The first step is to dissolve ethyl orthosilicate in a volume of absolute ethanol to form solution A, and then dissolve ammonia water with a mass concentration of 25% that is 5 times the volume of tetraethyl orthosilicate in b volume of anhydrous alcohol. Water and ethanol are configured into solution B, a:b=1:1, then, solution A is placed in a magnetic stirring device, and solution B is added in solution A under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.4mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 50°C to obtain SiO 2 Nano or submicron spheres;

[0027] In the second step, the particle size ratio is D SiO2 :D 有机微球 = 5:1 two kinds of spherical particles according to the mass ratio m SiO2 :m 有机微球 = 3: 1 Weighing respectively, and then ultrasonically dispe...

Embodiment 2

[0031] A method for preparing a non-close-packed opal photonic crystal, comprising the following steps:

[0032] The first step is to dissolve ethyl orthosilicate in a volume of absolute ethanol to form solution A, and then dissolve an equal volume of tetraethyl orthosilicate in ammonia water with a mass concentration of 28% in b volume of anhydrous Ethanol is configured into solution B, a:b=1:2, and then, solution A is placed in a magnetic stirring device, and solution B is added to solution A under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.6 mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 60°C to obtain SiO 2 Nano or submicron spheres;

[0033] In the second step, the particle size ratio is D SiO2 :D 有机微球 = 8:1 two kinds of spherical particles in mass ratio m SiO2 :m 有机微球 = 1:1 Weighing respectively, and then ultrasonically disperse the two kinds of spherical particl...

Embodiment 3

[0037] A method for preparing a non-close-packed opal photonic crystal, comprising the following steps:

[0038] The first step is to dissolve ethyl orthosilicate in a volume of dehydrated alcohol to form solution A, and then dissolve ammonia water with a mass concentration of 25% that is 4 times the volume of orthosilicate in b volume of anhydrous alcohol. Water and ethanol are configured into solution B, a:b=1:1.5, then, solution A is placed in a magnetic stirring device, and solution B is added in solution A under constant stirring, and the concentration of ethyl orthosilicate in the mixed solution is 0.5mol / L, after 22 hours of reaction, the precipitate was separated, washed by centrifugation and dried at 50°C to obtain SiO 2 Nano or submicron spheres;

[0039] In the second step, the particle size ratio is D SiO2 :D有机微球 = 6:1 two kinds of spherical particles in mass ratio m SiO2 :m 有机微球 = 2:1 Weighing respectively, and then ultrasonically disperse the two kinds of sph...

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PUM

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Abstract

The invention relates to a preparation method for a non-close-packed opal photonic crystal. The preparation method comprises the following steps of: preparing SiO2 spherical particles from tetraethoxysilane; performing ultrasonic and vertical deposition on large-sized SiO2 spherical particles and small-sized SiO2 organic particles to obtain a double-size colloid crystal structure; and calcining the obtained heterogeneous double-size colloid crystal structure at the combustion decomposition temperature of organic particles to remove organic matters to obtain the non-close-packed opal photonic crystal. By the method, equipment is simple. the method is simple and convenient in operation, preparation cycle is short, and product yield is high.

Description

technical field [0001] The invention relates to a preparation method of a photonic crystal, in particular to a preparation method of a non-close-packed opal photonic crystal. Background technique [0002] Photonic crystals are a new type of optical microstructure material whose refractive index changes spatially periodically. Photons are to artificial periodic dielectric materials, which is equivalent to electrons to semiconductor materials, hence the name. Among them, a three-dimensional ordered structure in which monodisperse microspheres are arranged periodically with a certain space interval in a certain medium is called a non-close-packed photonic crystal. This type of photonic crystal can improve the controllability of the photonic crystal. The methods for preparing non-close-packed photonic crystals mainly include microfabrication and self-assembly methods. The microfabrication method can prepare various photonic crystal structures, but the cycle is long and the cost ...

Claims

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Application Information

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IPC IPC(8): C30B29/00C30B29/18
Inventor 伍媛婷王秀峰
Owner SHAANXI UNIV OF SCI & TECH
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