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A kind of yellow-green hollow silicon oxide photonic crystal structural color thin film and preparation method thereof

A hollow silicon oxide, photonic crystal technology, applied in the coating and other directions, can solve the problems of limiting the application of hollow spherical photonic crystals, small effective refractive index modulation, low reflection intensity, etc., to achieve bright colors, solve easy fading, and improve color saturation. degree of effect

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, in the above method, since the shell layer of the photonic crystal assembled by hollow silicon oxide spheres is thin, the effective refractive index modulation is small, so the photonic crystal assembled by hollow silicon oxide has the disadvantage of low reflection intensity. Will severely limit the application of hollow spherical photonic crystals in structural color

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  • A kind of yellow-green hollow silicon oxide photonic crystal structural color thin film and preparation method thereof
  • A kind of yellow-green hollow silicon oxide photonic crystal structural color thin film and preparation method thereof

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Embodiment 1

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

[0027] (1) According to the dosage ratio of polystyrene (PS) microsphere powder, ethanol and deionized water according to the dosage ratio of 0.03g:30mL:3mL, the PS microsphere powder with a particle size of 280±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 0.3mL ammonia water per 30mL mixture, stir magnetically at room temperature for 30min, and then quickly add 250μL 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, ultrasonic...

Embodiment 2

[0033] A method for preparing a yellow-green 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:4mL, the PS microsphere powder with a particle size of 280±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 and mix by magnetic force at room temperature for 40min, then quickly add 300μL orthosilicon to the reaction system Ethyl acetate was used as the silicon source, and the PS@SiO 2 Core-shell microspheres;

[0035] (2) Accurately weigh step (1) to obtain PS@SiO 2 0.15 g of core-shell microspheres were ultrasonically dispersed in 10 mL of absolute ethanol to obtain SiO 2 The emulsion of microspheres wa...

Embodiment 3

[0038] A method for preparing a yellow-green 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:5mL, the PS microsphere powder with a particle size of 280±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 270μL 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, ultraso...

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Abstract

The invention discloses a yellow-green hollow silicon oxide photonic crystal structure color film and a preparation method thereof, and belongs to the technical field of photonic crystal structure color film preparation. The preparation method comprises the following steps: taking organic polystyrene (PS) microspheres as the template, carrying out surface modification to graft -NH2 to the surface of each microsphere, then wrapping the surface of each microsphere by a layer of uniform silicon oxide through an improved Stober method, finally forming a photonic crystal structure, which has an opal structure, on the surface of a glass substrate through self-assembly; and burning PS microspheres under the protection of reducing gas to carbonize PS microspheres so as to obtain the yellow-green hollow silicon oxide photonic crystal structure color film. Because the black substance generated by carbonizing PS microspheres exists in each layer of hollow silicon oxide shell, most incoherent scattered light can be absorbed, and the yellow-green hollow silicon oxide photonic crystal structure color film is prepared by assembling silicon oxide hollow spheres with high saturation. The preparation method has the advantages of simple process and easily available raw materials. The color film can be widely used in the fields such as displaying, printing, paints, cosmetics, photonic crystals, 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 yellow-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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23
CPCC03C17/23C03C2217/70C03C2218/111
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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