A kind of purple hollow silicon oxide photonic crystal structural color film and preparation method thereof

A photonic crystal and silicon oxide technology, applied in the field of purple hollow silicon oxide photonic crystal structural color film and its preparation, can solve the problems of small effective refractive index modulation, limited application of hollow spherical photonic crystal, low reflection intensity of photonic crystal, etc. Solve the effect of easy fading, bright color and high saturation

Active Publication Date: 2018-08-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the thinner shell layer of the photonic crystal assembled by hollow silicon oxide spheres, the effective refractive index modulation is smaller, so the photonic crystal assembled by hollow silicon oxide has a smaller reflection intensity.
This will seriously limit the application of hollow spherical photonic crystals in structural color

Method used

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  • A kind of purple hollow silicon oxide photonic crystal structural color film and preparation method thereof
  • A kind of purple hollow silicon oxide photonic crystal structural color film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] A method for preparing a purple hollow silicon oxide photonic crystal structural color thin film, comprising the following steps:

[0027] (1) Take polystyrene (PS) microsphere powder, ethanol and deionized water according to the dosage ratio of 0.03g:30mL:1mL, and ultrasonically disperse PS microsphere powder with a particle size of 200±5nm in anhydrous In the mixture of ethanol and deionized water, after the dispersion is complete, add ammonia water to the mixture according to the ratio of 0.3mL ammonia water per 30mL mixture, stir magnetically at room temperature for 30min, and then quickly add 150μL orthosilicon to the reaction system Ethyl acetate was used as the silicon source, and after 8 hours of magnetic stirring at room temperature, it was washed, centrifuged, and dried to obtain PS@SiO 2 Core-shell microspheres.

[0028] (2) Accurately weigh step (1) to obtain PS@SiO 2 Core-shell structure microspheres 0.1g, ultrasonically dispersed in 10ml of absolute etha...

Embodiment 2

[0033] A method for preparing a purple hollow silicon oxide photonic crystal structural color thin film, comprising the following steps:

[0034] (1) According to the dosage ratio of polystyrene (PS) microsphere powder, ethanol and deionized water according to the dosage ratio of 0.03g:35mL:2mL, the PS microsphere powder with a particle size of 200±5nm was ultrasonically dispersed in anhydrous In the mixture of ethanol and deionized water, after the dispersion is complete, add ammonia water to the mixture according to the ratio of 0.4mL ammonia water per 35mL mixture, stir magnetically at room temperature for 40min, and then quickly add 170μL orthosilicon to the reaction system Ethyl acetate was used as the silicon source, and the PS@SiO 2 Core-shell structure microspheres, hollow silicon oxide core microspheres, the diameter of which is 240±5nm, and the thickness of the shell layer is 25±5nm.

[0035] (2) Accurately weigh step (1) to obtain PS@SiO 2 0.15 g of core-shell mic...

Embodiment 3

[0038] A method for preparing a purple hollow silicon oxide photonic crystal structural color thin film, comprising the following steps:

[0039] (1) According to the dosage ratio of polystyrene (PS) microsphere powder, ethanol and deionized water according to the dosage ratio of 0.03g:40mL:3mL, the PS microsphere powder with a particle size of 200±5nm was ultrasonically dispersed in anhydrous In the mixture of ethanol and deionized water, after the dispersion is complete, add ammonia water to the mixture according to the ratio of 0.5mL ammonia water per 45ml mixture, stir and mix with magnetic force at room temperature for 30min, then quickly add 200μL orthosilicic acid to the reaction system Ethyl ester was used as the silicon source, and after 7 hours of magnetic stirring at room temperature, washing, centrifugation, and drying, PS@SiO 2 Core-shell microspheres.

[0040] (2) Accurately weigh step (1) to obtain PS@SiO 2 Core-shell structure microspheres 0.18g, ultrasonically...

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Abstract

The invention discloses a purple hollow silicon oxide photonic crystal structure color thin film and a preparation method thereof and belongs to the technical field of preparation of photonic crystal structure color thin films. According to the method, organic microsphere polystyrene (PS) with the particle size being 200+ / -5 nm serves as a template, -NH2 is firstly modified on the surface of the template, then the surface of the template is coated with a uniform silicon oxide layer through the improved method shown in the specification, finally, a photonic crystal structure of an opal structure is formed on the surface of a glass substrate in a self-assembly mode, then, PS microspheres are forged under protection of reduction atmosphere to be carbonized, black matter generated by the carbonized PS microspheres exist in all hollow silicon oxide shell layers to absorb most part of incoherent scattered light, and the purple photonic crystal structure color thin film assembled by the high-saturability silicon oxide hollow spheres is obtained. The method is simple in process, raw materials are easy to obtain, and the method can be widely applied in the aspects of display, printing, paint, cosmetics, photonic crystal and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of photonic crystal structural color thin films, and in particular relates to a purple hollow silicon oxide photonic crystal structural color thin film and a preparation method thereof. Background technique [0002] Structural color is produced by the phenomenon of interference, scattering or diffraction between the microstructure of the object and visible light. This is a kind of physical coloration, which has the advantages of bright color, never fading, environmental friendliness, and short preparation cycle. Among them, through the ordered self-assembly method of colloidal microspheres, the opal photonic crystals with alternating high and low refractive indices formed also have the characteristics of photonic band gap. When the incident light frequency falls within the band gap range, the incident light will not pass through the photonic crystal. Photonic crystals, the visible light that c...

Claims

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Application Information

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IPC IPC(8): C03C17/23
Inventor 王芬张欣盖言成林营王毅朱建锋杨海波
Owner SHAANXI UNIV OF SCI & TECH
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