Preparation method and application of carbon dot photonic crystal having opal structure or inverse opal structure

An inverse opal structure, photonic crystal technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc.

Active Publication Date: 2016-04-27
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the combination of carbon dots and photonic crystals to prepare materials with photonic bandgap modulation optical limiting performance and anti-counterfeiting performance.

Method used

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  • Preparation method and application of carbon dot photonic crystal having opal structure or inverse opal structure
  • Preparation method and application of carbon dot photonic crystal having opal structure or inverse opal structure
  • Preparation method and application of carbon dot photonic crystal having opal structure or inverse opal structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Preparation of core-shell polystyrene microspheres

[0049] Add 1 mass part of methyl methacrylate to 90 mass parts of water, 1 mass part of acrylic acid and 17 mass parts of styrene, then add 0.002 mass part of emulsifier sodium dodecylbenzenesulfonate, and buffer sodium bicarbonate 0.52 parts by mass of the obtained reaction solution; keep the reaction solution at 70°C for 1 hour, then add 0.48 parts by mass of ammonium persulfate aqueous solution, and react at 80°C for 12 hours under continuous stirring conditions to prepare polystyrene microparticles with a core-shell structure. ball.

[0050] 2. Preparation of photonic crystal template

[0051] Pour the polystyrene microsphere emulsion with a particle size of 250nm into a small beaker, place the super-hydrophilic solid substrate vertically in a small beaker filled with a certain concentration of polystyrene emulsion, and place it in a constant temperature and humidity chamber. (temperature: 20° C., humidity: 6...

Embodiment 2

[0059] 1. Preparation of core-shell polystyrene microspheres

[0060] Add 1.2 mass parts of methyl methacrylate to 100 mass parts of water, 1.2 mass parts of acrylic acid and 21 mass parts of styrene, then add 0.004 mass parts of emulsifier sodium dodecylbenzenesulfonate, and buffer sodium bicarbonate 0.55 parts by mass to obtain the reaction solution; keep the reaction solution at 80°C for 2 hours, then add 0.5 parts by mass of ammonium persulfate aqueous solution, and react at 90°C for 15 hours under continuous stirring conditions, and the polystyrene microparticles with a core-shell structure can be prepared. ball.

[0061] 2. Preparation of photonic crystal template

[0062] Pour the polystyrene microsphere emulsion with a particle size of 250nm into a small beaker, place the super-hydrophilic solid substrate vertically in a small beaker filled with a certain concentration of polystyrene emulsion, and place it in a constant temperature and humidity chamber. (Temperature:...

Embodiment 3

[0070] 1. Preparation of core-shell polystyrene microspheres

[0071] Add 0.8 mass parts of methyl methacrylate to 80 mass parts of water, 0.8 mass parts of acrylic acid and 17 mass parts of styrene, then add 0 mass parts of emulsifier sodium dodecylbenzenesulfonate, and buffer sodium bicarbonate 0.5 parts by mass to obtain the reaction solution; keep the reaction solution at 60°C for 0.5 hours, then add 0.45 parts by mass of ammonium persulfate aqueous solution, and react at 70°C for 10 hours under continuous stirring conditions, and the polystyrene microparticles with a core-shell structure can be prepared. ball.

[0072] 2. Preparation of photonic crystal template

[0073] Pour the polystyrene microsphere emulsion with a particle size of 250nm into a small beaker, place the super-hydrophilic solid substrate vertically in a small beaker filled with a certain concentration of polystyrene emulsion, and place it in a constant temperature and humidity chamber. (temperature: 80...

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Abstract

The invention discloses a preparation method and application of a carbon dot photonic crystal having an opal structure or an inverse opal structure and having photonic band gap modulation of optical limiting and anti-fake performance. According to the method, with polystyrene microspheres as a raw material, a photonic crystal template is assembled by a vertical deposition method, then the carbon dot photonic crystal having the inverse opal structure is prepared by a sacrificial template method; or a carbon dot solution is added in the process of synthesis of silica microspheres, silica microspheres containing carbon dots and having different particle sizes are prepared, and then the carbon dot photonic crystal having the opal structure is assembled by a vertical deposition method. The obtained carbon dot photonic crystal has good optical limiting modulation behavior on laser according to difference of band gaps. At the same time, the prepared carbon dot photonic crystal is patterned by using a photoetching template, and can be used in anti-fake patterns with combination of the characteristic that the carbon dot photonic crystal emits fluorescence with different colors under different excitation light. The method has the advantages of simple operation and low cost, and is suitable for large-scale preparation of the carbon dot photonic crystal having special functions.

Description

technical field [0001] The invention relates to the preparation of functional opal structure or inverse opal structure carbon point photonic crystal. More specifically, it relates to a preparation method and application of an opal-structured or inverse-opal-structured carbon-dot photonic crystal with photonic bandgap modulation light limiting and anti-counterfeiting properties. Background technique [0002] In recent years, with the control of the microscopic size and surface modification of carbon materials, a new type of carbon luminescent material, namely carbon dots, has been prepared. Carbon dots are mainly divided into graphene quantum dots, carbon nanodots and polymer dots. The carbon dots of different composition forms should actually be slightly different. But in general, carbon dots have the following common excellent properties. The preparation method of carbon dots is simple, and the raw materials are easy to obtain, so that the production cost is greatly redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/02C30B19/00
CPCC30B19/00C30B29/02
Inventor 王京霞刘俊超江雷
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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