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A RGB color control method based on magnetic photonic nanochain

A photonic nanometer and magnetic technology, applied in the direction of nonlinear optics, optics, instruments, etc., can solve the problems of limited application, narrow dynamic control ability, few color control methods, etc., to achieve rich adjustment methods, simple adjustment methods, rich color mixing effect Effect

Active Publication Date: 2022-04-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the fact that the two kinds of particles that constitute the double-bandgap cannot obtain a better diffraction peak of the single-bandgap photonic crystal under the same magnetic field strength, and the half-peak width is wider, the assembled double-bandgap photonic crystal exhibits a narrow dynamic Regulatory ability
"Chemical Materials" magazine (Chem.Mater.2013, Vol. 25, No. 13, Page 2684) reported a self-assembly of silica particles using different sizes to form a multilayer photonic crystal film, each layer of film All have independent band gaps, and finally display red, green, blue and other colors obtained by combining these three colors, but their colors cannot be dynamically adjusted
"Optical Materials" magazine (Optical Materials.2016, Vol. 57, Page 107) reported a method of depositing silicon dioxide or ferric oxide on polystyrene spheres to prepare dual-structure colloidal photonic crystals, by adjusting the colloidal The size can adjust the two-photon band gap of the final photonic crystal film, but the photonic crystal film obtained by self-assembly of colloidal particles will no longer be adjustable once formed, and the color saturation is also poor
[0006] It can be seen that the current photonic crystal structure based on nanoparticle assembly has few color control methods and poor modulation effect, which limits its application in optical modulation, anti-counterfeiting, bionics and other fields.

Method used

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  • A RGB color control method based on magnetic photonic nanochain
  • A RGB color control method based on magnetic photonic nanochain
  • A RGB color control method based on magnetic photonic nanochain

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The preparation of a magnetic photonic nanochain whose initial color is red comprises the following steps:

[0032] (1) Disperse superparamagnetic nanocrystalline cluster core-shell particles (particle size is 180nm) into N-isopropylacrylamide (NIPAM), polyacrylic acid (PAA), photoinitiator 2-hydroxyl-2-methyl -1-Phenylacetone (HMPP), cross-linking agent methylene bisacrylamide (BIS), water and ethylene glycol in the dispersion medium to form a pre-polymerization liquid, the concentration of NIPAM in the pre-polymerization liquid is 0.20mmol / ml, The amount of crosslinking agent is 2.5% of the total molar amount of HEMA monomer, the amount of photoinitiator is 2% of the total molar amount of NIPAM monomer, and the concentration of superparamagnetic nanocrystal cluster core-shell particles in the prepolymerization liquid is 0.6mg / ml, the ratio of ethylene glycol to water is 10:1.

[0033] (2) Place the pre-polymerization solution under an external magnetic field of 150-...

Embodiment 2

[0045] A method for regulating RGB colors based on magnetic photonic nanochains, comprising the following steps:

[0046] (1) Mix the magnetic photonic nanochains with red and green initial colors prepared in Example 1 at a mass ratio of 1:1, and shake to disperse them evenly.

[0047] (2) A magnetic field is applied to the mixed chain solution, and the solution shows a beautiful structural color.

[0048] Figure 4 Spectrogram (a) and digital photograph (b) after applying a magnetic field to the solution of mixed chains in this embodiment; it can be seen from Figure (a) that there are two chains with different photonic band gaps in the mixed solution. The mixed color of chains with two band gaps corresponds to the beautiful yellow in Figure (b). This color mixing rule is in line with the color mixing rule of RGB color mode, that is, red plus green gets yellow.

Embodiment 3

[0050] A method for regulating RGB colors based on magnetic photonic nanochains, comprising the following steps:

[0051] (1) Mix the magnetic photonic nanochains with red and blue initial colors prepared in Example 1 at a ratio of 1:1, and shake to disperse them evenly.

[0052] (2) A magnetic field is applied to the mixed chain solution, and the solution shows a beautiful structural color.

[0053] Figure 5 Spectrogram (a) and digital photograph (b) after applying a magnetic field to the solution of mixed chains in this embodiment; it can be seen from Figure (a) that there are two chains with different photonic band gaps in the mixed solution. The mixed color of chains with two band gaps corresponds to the beautiful magenta in Figure (b). This color mixing rule conforms to the color mixing rule of the RGB color model, that is, magenta is obtained by adding red to blue.

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Abstract

The invention relates to the field of photonic crystal materials, in particular to a RGB color control method based on magnetic photonic nanochains. The composite system contains at least two kinds of band gap magnetic photonic nanochain color rendering units, and at least one magnetic photonic nanochain The chain can respond to external stimuli to realize the dynamic regulation of the hue, lightness and saturation of complex colors. The method of the present invention aims at the disadvantages of the existing photonic crystal structure based on nanoparticle assembly, which have few color control means and poor modulation effect, and provides more abundant adjustment means, and the adjustment method is simple and convenient. The basic unit for regulating color hue, lightness, and saturation is the magnetic photonic nanochain. The magnetic nanoparticles in the magnetic photonic nanochain are arranged at equal intervals in one-dimensional direction, and its structural color is more stable. There are more ways to control the color, and the hue, lightness, and saturation of the structural color can be adjusted to obtain richer color mixing effects.

Description

technical field [0001] The invention relates to the field of photonic crystal materials, in particular to an RGB color control method based on magnetic photonic nano chains. Background technique [0002] Dyeing agents represented by pigments and pigments are in great demand in industries such as coatings, printing and dyeing, and plastic products. Richer colors can be obtained by compounding dyes of different colors. According to the composition of pigments, it can be divided into inorganic pigments and organic pigments. Although the former has good stability, it has incomplete color spectrum, poor color brilliance and some varieties are highly toxic, while the latter, although bright in color and non-toxic, has poor weather resistance. But worse. [0003] In order to represent various colors, people usually divide the color into a combination of several components. Common color modes include CMYK color mode and RGB color mode. The CMYK mode is a commonly used color mode i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/09G02F1/01G02F1/00
CPCG02F1/09G02F1/0147G02F1/0036
Inventor 马会茹蒋浩李刚陈继涛罗巍官建国
Owner WUHAN UNIV OF TECH
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