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Preparation method for SiO2 colloidal crystal rainbow film with gorgeous colors

A technology of colloidal crystal and rainbow film, which is applied in the plating of superimposed layers, metal material coating process, coating and other directions, can solve the problems of insufficient color rendering, improve reflection intensity, simple preparation process and broad application prospects. Effect

Inactive Publication Date: 2016-06-29
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of brilliant color SiO 2 Colloidal crystal iridescent film preparation method to solve the current SiO 2 The colloidal crystal film presents a weak rainbow color, and the color is not bright enough

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  • Preparation method for SiO2 colloidal crystal rainbow film with gorgeous colors

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Embodiment Construction

[0017] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0018] The invention presents a brilliantly colored SiO 2 A preparation method for a colloidal crystal iridescent film, comprising the steps of:

[0019] (1) Take a small amount of monodisperse and uniform SiO with an average particle size of 340±10nm 2 Put microspheres into a certain amount of ethanol and stir evenly, and prepare SiO with a concentration of 1-3wt% 2 Colloidal solution, ultrasonic dispersion 2-4h.

[0020] (2) Wash the substrate with deionized water, ultrasonically clean it in deionized water and ethanol respectively for 30-90 min, and then dry it for later use. Mount the cleaned substrate vertically on the ultrasonically dispersed SiO 2 colloid solution, move it into a drying oven, control the drying time to 24-30h, and the drying temperature to 40-65°C.

[0021] (3) The assembled SiO taken out from the oven 2 Put the col...

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Abstract

The invention relates to a preparation method for a SiO2 colloidal crystal rainbow film with gorgeous colors, and belongs to the technical field of photonic crystal structure color preparation. The method comprises the steps that SiO2 microspheres with good monodispersity and uniformity and with the average particle size being 340+ / -10 nm are taken, a SiO2 colloid solution with the concentration ranging from 1% to 3% by weight is prepared, and ultrasonic dispersion is carried out for 2 h to 4 h; a cleaned substrate is vertically fixed in the ultrasonically-dispersed SiO2 colloid solution and put into a drying box, the drying time is controlled to range from 24 h to 30 h, and the drying temperature is controlled to range from 40 DEG C to 65 DEG C; and the surface of an assembled SiO2 colloidal crystal film is plated with a platinum film with the thickness ranging from 5 nm to 10 nm through a vacuum ion sputtering method, the reflection strength of the SiO2 colloidal crystal film on a photonic band gap is remarkably improved, and the gorgeous iridescent colors are macroscopically presented along with changes of the angle of incident light.

Description

technical field [0001] The invention belongs to the technical field of preparation of photonic crystal structure color, in particular to a kind of SiO with brilliant color 2 A method for preparing a colloidal crystal iridescent film. Background technique [0002] Structural color is the effect of selective reflection and transmission of certain wavelengths produced by the interaction of visible light with the physical microstructure of the material when light hits the surface of an object, causing us to perceive color. Structural color phenomena are not uncommon in nature. For example, the blue sky comes from Rayleigh scattering, the color of oil stains on water comes from film interference, and the rainbow comes from refraction. Structural color is related to the microstructure of the substance and the properties of the material. As long as the microstructure that produces the structural color and the physical properties of the material remain unchanged, the structural col...

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Application Information

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IPC IPC(8): C23C28/00
CPCC23C28/322C23C28/345
Inventor 王莉丽王秀锋刘派伍媛婷
Owner SHAANXI UNIV OF SCI & TECH
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