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A kind of photonic crystal film, its preparation method and application

A technology of photonic crystals and thin films, which is applied in the measurement of color/spectral characteristics, the measurement of the change force of optical properties of materials when they are stressed, and the oxide of ferrous iron, can solve the problem of poor mechanical sensitivity and cannot be applied Naked eye detection, long preparation cycle of hydrogel photonic crystals and other issues, to achieve the effect suitable for large-scale production, short preparation time and bright colors

Active Publication Date: 2018-06-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a photonic crystal thin film, its preparation method and application, the purpose of which is to use Fe 3 o 4 The nanoparticle and monomer formula form a regular structure in the photonic crystal film, thus solving the technical problems of the existing hydrogel photonic crystals, such as long preparation period, poor mechanical sensitivity, and unsuitable for naked-eye detection

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  • A kind of photonic crystal film, its preparation method and application
  • A kind of photonic crystal film, its preparation method and application
  • A kind of photonic crystal film, its preparation method and application

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preparation example Construction

[0029] The photonic crystal thin film provided by the invention, its preparation method, comprises the following steps:

[0030] (1) Preparation of hydrogel photonic crystal precursor: Fe 3 o 4 Nanoparticles, acrylamide, methylene acrylamide and photoinitiator are uniformly dispersed in the organic solution to obtain a suspension of the hydrogel photonic crystal precursor, so that Fe in each milliliter of photonic crystal hydrogel precursor 3 o 4 1 mg to 50 mg of nanoparticles, 100 mg to 600 mg of acrylamide, 1 mg to 20 mg of methylene acrylamide, and 0.1 mg to 1 mg of photoinitiator; the organic solvent is ethylene glycol, and its function is to prevent Fe 3 o 4 The nanoparticles are separated under a magnetic field.

[0031] The Fe 3 o 4 Nanoparticles are prepared according to the following method: dissolving ferrocene and hydrogen peroxide in acetone to obtain a solution, so that the concentration of ferrocene in the solution is between 0.001 mg / ml and 0.05 mg / ml, and...

Embodiment 1

[0038] A photonic crystal thin film is prepared according to the following method:

[0039] (1) Preparation of hydrogel photonic crystal precursor: Fe 3 o 4 Nanoparticles, acrylamide, methylene acrylamide and photoinitiator are uniformly dispersed in ethylene glycol by ultrasonic dispersion method to obtain a suspension of hydrogel photonic crystal precursor, so that each milliliter of photonic crystal hydrogel precursor Contains Fe 3 o 4 Nanoparticles 1mg, acrylamide 100mg, methylene acrylamide 1mg, photoinitiator 0.1mg; ethylene glycol as an organic solvent can prevent Fe 3 o 4 The nanoparticles are separated under a magnetic field.

[0040] The Fe 3 o 4 Nanoparticles are prepared as follows: dissolve ferrocene and hydrogen peroxide in 75ml of acetone, and add the solution to a 100mL stainless steel reaction kettle, so that the concentration of ferrocene in the solution is 0.001mg / ml, and the concentration of hydrogen peroxide is 0.01mg / ml; react at 100°C for 10 hou...

Embodiment 2

[0046] A photonic crystal thin film is prepared according to the following method:

[0047] (1) Preparation of hydrogel photonic crystal precursor: Fe 3 o 4 Nanoparticles, acrylamide, methylene acrylamide and photoinitiator are uniformly dispersed in ethylene glycol by ultrasonic dispersion method to obtain a suspension of hydrogel photonic crystal precursor, so that each milliliter of photonic crystal hydrogel precursor Contains Fe 3 o 4 Nanoparticles 2mg, acrylamide 300mg, methylene acrylamide 4.5mg, photoinitiator 0.22mg; ethylene glycol as an organic solvent can prevent Fe 3 o 4 The nanoparticles are separated under a magnetic field.

[0048] The Fe 3 o 4 Nanoparticles are prepared as follows: dissolve ferrocene and hydrogen peroxide in 75ml of acetone, and add the solution to a 100mL stainless steel reaction kettle, so that the concentration of ferrocene in the solution is 0.0023mg / ml, and the concentration of hydrogen peroxide is 0.025mg / ml; react at 200°C for 2...

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Abstract

The invention discloses a photonic crystal film, its preparation method and application. The photonic crystal thin film includes Fe3O4 nanoparticles and polyacrylamide hydrogel, and the Fe3O4 nanoparticles are uniformly dispersed in the polyacrylamide hydrogel, and the concentration is between 1 mg / ml and 50 mg / ml. Its preparation method is as follows: (1) uniformly disperse Fe3O4 nanoparticles, acrylamide, methylene acrylamide and photoinitiator in an organic solution to obtain a suspension of hydrogel photonic crystal precursor; (2) gel photonic crystal precursor The suspension of the crystal precursor is laid into a film of 150-300 μm; a magnetic field of 300-2000 Gauss is applied to make the film develop color, and then solidified; (3) Soak the cured photonic crystal film in water to replace the organic solvent, That is, the photonic crystal thin film is produced. The thin film has sensitive solvent response and mechanical response capabilities, can be prepared quickly, and can be applied to naked-eye detection.

Description

technical field [0001] The invention belongs to the field of photonic crystal materials, and more specifically relates to a photonic crystal thin film, its preparation method and application. Background technique [0002] Photonic crystals are a periodic structure composed of materials with different refractive indices alternately in space. The most fundamental feature of photonic crystals is that they have a photonic forbidden band, that is, light falling in the forbidden band is prohibited from propagating. Due to their unique optical properties, photonic crystals are widely used in the fields of preparation and coding materials of various optical devices (such as modulators, sensors, displays, etc.). [0003] Nanoparticles can self-assemble through volatilization to form photonic crystal films under the gravitational field. Although the preparation process of this method is simple, the preparation cycle is long, polycrystalline state is easily formed, the obtained photon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08J5/18C08J3/28C08L33/26C08F220/56C08F2/48C08F2/44C08K3/22C01G49/08G01L1/24G01N21/29
Inventor 朱锦涛贾晓潞王建颖
Owner HUAZHONG UNIV OF SCI & TECH
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