Preparation method of non-close packed inverse opal photonic crystal

A photonic crystal and inverse opal technology, which is applied in the field of preparation of non-close-packed inverse opal photonic crystals, can solve the problems of small gaps, unfavorable development and application of inverse opal structures, etc. Effect

Active Publication Date: 2012-02-08
JIANGSU GUOJIAO CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current research and preparation process of inverse opal colloidal crystals, the gaps between opal colloidal crystal templates are often small, which is not conducive to the development and application of new inverse opal structures and properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a non-close-packed inverse opal photonic crystal, comprising the following steps:

[0030] The first step is to dissolve ethyl orthosilicate in a volume of absolute ethanol to configure solution A, and then dissolve an equal volume of tetraethyl orthosilicate in ammonia water with a mass concentration of 25% in b volume of anhydrous Ethanol is configured into solution B, a:b=1:1, 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 0.4 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;

[0031] In the second step, add deionized water to the round bottom flask first, and then add styrene to control the concentration of styrene to 1mol / L, continue to pass nitrogen and keep the temperature at 80°C, and then add...

Embodiment 2

[0036] A method for preparing a non-close-packed inverse opal photonic crystal, comprising the following steps:

[0037] The first step is to dissolve ethyl orthosilicate in a volume of absolute ethanol to configure solution A, and then dissolve ammonia water with a mass concentration of 28% 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=1:2, 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 0.6mol / 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;

[0038] In the second step, add deionized water to the round bottom flask first, and then add styrene to control the concentration of styrene to 5mol / L, continue to pass nitrogen and keep the temperatur...

Embodiment 3

[0043] A method for preparing a non-close-packed inverse opal photonic crystal, comprising the following steps:

[0044] The first step is to dissolve ethyl orthosilicate in a volume of absolute ethanol to configure solution A, and then dissolve ammonia water with a mass concentration of 25% that is 3 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 55°C to obtain SiO 2 Nano or submicron spheres;

[0045] In the second step, first add deionized water to the round bottom flask, and after blowing nitrogen, add styrene to control the concentration of styrene to 2mol / L, continue to blow nitrogen and keep the ...

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Abstract

A preparation method of non-close packed inverse opal photonic crystals comprises the following steps: preparing SiO2 spherical particles with ethyl orthosilicate as a raw material, performing ultrasonic treatment and vertical deposition of small-size SiO2 spherical particles and large-size organic particles to obtain a dual-size colloidal crystal structure, calcining the obtained heterogeneous dual-size colloidal crystal structure at a combustion decomposition temperature of the organic particles to remove organic matter so as to obtain non-close packed inverse opal photonic crystals; the method of the invention has simple equipment, simple operations, a short preparation period, and high yield.

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 inverse opal photonic crystal. Background technique [0002] Photonic crystal is a kind of material whose dielectric constant changes periodically, and the most fundamental feature is that it has a photonic band gap. Photonic crystals can be divided into opal-structured photonic crystals and inverse-opal-structured photonic crystals. At present, the self-assembly method is one of the main methods for preparing photonic crystals with opal structures. However, since the colloidal spheres used in the self-assembly method are required to be spherical particles with narrow particle size distribution and good dispersion, silica and polystyrene are mainly used. However, silica or polystyrene has a small refractive index and only has a directional band gap. Filling the gaps of colloidal crystals with high refractive index materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/00C30B29/18
Inventor 伍媛婷王秀峰
Owner JIANGSU GUOJIAO CHEM TECH
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