Preparation method for non-close-packed SiO2 photonic crystals

A photonic crystal and non-dense technology, which is applied in the field of preparation of non-close-packed SiO2 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 equipment simple effect

Active Publication Date: 2012-04-18
江苏优耐机械制造有限公司
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  • Summary
  • Abstract
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Problems solved by technology

[0003] 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 polymerizati

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A non-close-packed SiO 2 The preparation method of photonic crystal comprises the following steps:

[0025] The first step is to dissolve ethyl orthosilicate in a volume of absolute ethanol to configure solution A, and then dissolve 0.8 times the volume of tetraethyl orthosilicate in ammonia water with a mass concentration of 25% 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 0.6mol / L, after reacting for 20h, separate the precipitate, centrifuge and wash and dry at 50°C to obtain SiO 2 Nano or submicron spheres;

[0026] In the second step, the prepared particle size ratio is large balls: small balls = 8:1 two kinds of SiO 2 Spherical particles were weighed according to the mass ratio of large ball: small ball = 10:1, and the two kind...

Embodiment 2

[0030] A non-close-packed SiO 2 The preparation method of photonic crystal comprises the following steps:

[0031] 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=1:1, 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 0.2mol / L, after reacting for 20h, separate the precipitate, wash by centrifugation and dry at 60°C to obtain SiO 2 Nano or submicron spheres;

[0032] In the second step, the prepared particle size ratio is large balls: small balls = 5:1 two kinds of SiO 2 Spherical particles were weighed according to the mass ratio of large ball: small ball = 5: 1, and the tw...

Embodiment 3

[0036] A non-close-packed SiO 2 The preparation method of photonic crystal comprises the following steps:

[0037] 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% twice 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 0.4mol / L, after reacting for 20h, separate the precipitate, wash by centrifugation and dry at 50°C to obtain SiO 2 Nano or submicron spheres;

[0038] In the second step, the prepared particle size ratio is large balls: small balls = 5:1 two kinds of SiO 2 Spherical particles were weighed according to the mass ratio of large ball: small ball = 7: 1, and the two kinds of SiO 2 Spheri...

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Abstract

The invention relates to a preparation method for non-close-packed SiO2 photonic crystals. The preparation method comprises the following steps: taking tetraethoxysilane as a raw material, thereby preparing SiO2 nanometer and submicron sphere grains; ultrasonically and automatically assembling two SiO2 sphere grains at a certain particle size ratio, thereby obtaining a double-size photonic crystal structure; and roasting, etching and cleaning the double-size photonic crystal structure, thereby obtaining the non-close-packed SiO2 photonic crystals. The preparation method provided by the invention is short in preparation period and simple in processing equipment.

Description

technical field [0001] The invention relates to a preparation method of a photonic crystal, in particular to a non-close-packed SiO 2 Preparation methods of photonic crystals. Background technique [0002] The concept of photonic crystals is that dielectric materials with different dielectric constants or refractive indices are arranged periodically and orderly in one-dimensional, two-dimensional or three-dimensional directions, so as to select the propagation of light of a specific wavelength. The materials with sexual inhibition or modulation, in which monodisperse microspheres are arranged in a certain space interval with each other in a certain medium to form a three-dimensional ordered structure called non-close packed photonic crystals, this kind of photonic crystals can improve photonic Controllability of crystals. [0003] The methods for preparing non-close-packed photonic crystals mainly include microfabrication and self-assembly methods. The microfabrication met...

Claims

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Application Information

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IPC IPC(8): C03C17/23C04B41/50
Inventor 伍媛婷王秀峰
Owner 江苏优耐机械制造有限公司
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