A blue-green hollow silicon oxide photonic crystal structural color film and its preparation method

A hollow silicon oxide and photonic crystal technology, which is applied in the field of blue-green hollow silicon oxide photonic crystal structural color thin film and its preparation, can solve the problems of limiting the application of hollow spherical photonic crystals, small effective refractive index modulation, and small reflection intensity of photonic crystals. , to achieve the effect of bright color, easy fading and high saturation

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

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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 blue-green hollow silicon oxide photonic crystal structural color film and its preparation method
  • A blue-green hollow silicon oxide photonic crystal structural color film and its preparation method

Examples

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Effect test

Embodiment 1

[0025] A method for preparing a blue-green hollow silicon oxide photonic crystal structural color thin film, comprising the following steps:

[0026] (1) According to the dosage ratio of 0.03g:30mL:2mL of polystyrene (PS) microsphere powder, ethanol and deionized water, weigh PS microsphere powder with a particle size of 240±5nm and ultrasonically disperse it in anhydrous In the mixture of ethanol and deionized water, after the dispersion is complete, add 0.3mL of ammonia water to the mixture according to the ratio of 0.3mL of ammonia water per 30mL of the mixture, stir magnetically at room temperature for 30min, and then quickly add 200uL orthosilicon to the reaction system Ethyl acetate was used as the silicon source, and the PS@SiO 2 The core-shell microsphere has a diameter of 300±5nm and a shell thickness of 30±5nm.

[0027] (2) Accurately weigh step (1) to obtain PS@SiO 2 Core-shell structure microspheres 0.1g, ultrasonically dispersed in 10mL of absolute ethanol, prep...

Embodiment 2

[0032] A method for preparing a blue-green hollow silicon oxide photonic crystal structural color thin film, comprising the following steps:

[0033] (1) According to the dosage ratio of 0.03g:35mL:3mL of polystyrene (PS) microsphere powder, ethanol and deionized water, weigh PS microsphere powder with a particle size of 240±5nm and ultrasonically disperse it in anhydrous In the mixture of ethanol and deionized water, after the dispersion is complete, add 0.4mL of ammonia water to the mixture according to the ratio of 0.4mL of ammonia water per 35mL of the mixture, stir and mix by magnetic force at room temperature for 40min, then quickly add 230uL orthosilicon into 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 structure microspheres, hollow silicon oxide core microspheres, the diameter of which is 300±5nm, and the thickness of the...

Embodiment 3

[0037] A method for preparing a blue-green hollow silicon oxide photonic crystal structural color thin film, comprising the following steps:

[0038](1) According to the dosage ratio of polystyrene (PS) microsphere powder, ethanol and deionized water according to the dosage ratio of 0.03g:40mL:4mL, the PS microsphere powder with a particle size of 240±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 50min, then quickly add 250uL orthosilicic acid into the reaction system Ethyl ester was used as the silicon source, and the PS@SiO 2 Core-shell microspheres.

[0039] (2) Accurately weigh step (1) to obtain PS@SiO 2 Core-shell structure microspheres 0.18g, ultrasonically dispersed in 10mL absolute ethanol to obtain SiO 2 The emulsion of microspheres ...

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Abstract

The invention discloses a blue-green hollow monox photonic crystal structural color film and a preparing method thereof, and belongs to the technical field of preparation of photonic crystal structural color films. According to the preparing method, organic microsphere polystyrene (PS) is used as a template, the surface of PS is modified with -NH2, the surface of PS is coated with a uniform monox layer through a modified Stober method, finally, a photonic crystal structure of an opal structure is formed on the surface of a glass substrate through self-assembly, and then PS microspheres are carbonized through calcining under protection of reducing atmosphere. As a black substance generated by the carbonized microspheres exists in all hollow monox shells, most incoherent scattered light is absorbed to obtain the blue-green hollow monox photonic crystal structural color film assembled by monox hollow spheres with high saturability. The method is simple in process, the raw materials are easy to obtain, and the blue-green hollow monox photonic crystal structural color film will be widely applied to display, printing, paint, cosmetics, photonic crystals and other aspects.

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 blue-green 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 th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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