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Method for modifying opal and inverse opal-structured photonic crystal by nanometer silver

An inverse opal structure and photonic crystal technology, applied in chemical instruments and methods, crystal growth, nanotechnology, etc., can solve problems that cannot meet high-performance optical devices and detectors, and have many defects

Active Publication Date: 2015-09-09
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the prior art, colloidal crystals are used as templates to prepare inverse opal photonic crystals with metal and metal oxide colloidal crystal microspheres as structural units, which have many defects and cannot meet the requirements of high-performance optical devices and Detector requirements, thus providing a photonic crystal with nano-silver modified opal and inverse opal structure with less defects and excellent performance

Method used

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  • Method for modifying opal and inverse opal-structured photonic crystal by nanometer silver
  • Method for modifying opal and inverse opal-structured photonic crystal by nanometer silver
  • Method for modifying opal and inverse opal-structured photonic crystal by nanometer silver

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Embodiment 1

[0033] This embodiment provides a nano-silver modified SiO 2 A method for an inverse opal structured photonic crystal, comprising the steps of:

[0034] (1) successively take by weighing 0.51g silver nitrate and be dissolved in the pure water of 3ml, 10mg potassium iodide is dissolved in 1ml pure water, wherein, the concentration of described silver nitrate solution is 1mol / L, and the molar concentration of described soluble silver salt solution is 16.6 times of the molar concentration of the potassium iodide solution; the above-mentioned potassium iodide solution is added dropwise in the above-mentioned silver nitrate solution, and vigorous magnetic stirring is carried out at a stirring rate of 1500r / min, so that the silver iodide precipitate formed in an instant forms a sol until KI After the solution is added dropwise, the AgI sol is obtained;

[0035] (2) Use the silica inverse opal structure with a structural unit size of 300nm and a thickness of 5 microns as a template ...

Embodiment 2

[0042] This embodiment provides a nano-silver modified SiO 2 A method for an inverse opal structured photonic crystal, comprising the steps of:

[0043] (1) Weigh 0.34g of silver nitrate and dissolve it in 3ml of pure water, weigh 6mg of potassium iodide and dissolve it in 1ml of pure water, wherein the concentration of the silver nitrate solution is 0.667mol / L, and the concentration of the soluble silver salt solution The molar concentration is 18.4 times of the molar concentration of the potassium iodide solution; the above-mentioned potassium iodide solution is added dropwise to the above-mentioned silver nitrate solution, and vigorous magnetic stirring is carried out at a stirring rate of 1200r / min, so that the instantaneously generated silver iodide precipitates to form a sol , until the KI solution is added dropwise, the AgI sol is obtained;

[0044] (2) Use the silica inverse opal structure with a structural unit size of 150nm and a thickness of 1 micron as a template ...

Embodiment 3

[0047] This embodiment provides a nano-silver modified SiO 2 A method for an inverse opal structured photonic crystal, comprising the steps of:

[0048] (1) take by weighing 0.1g silver acetate and be dissolved in the pure water of 60ml, take by weighing 2mg potassium iodide and be dissolved in 1ml pure water, wherein, described silver acetate solution concentration is 0.01mol / L, the mole of described soluble silver salt solution The concentration is 5 times of the molar concentration of the potassium iodide solution; the above-mentioned potassium iodide solution is added dropwise in the above-mentioned silver acetate solution, and vigorously mechanically stirred at a stirring rate of 800r / min, so that the silver iodide precipitation generated instantaneously forms a sol, Until the KI solution is added dropwise, silver iodide sol is obtained;

[0049] (2) Use the silica inverse opal structure with a structural unit size of 50 nanometers and a thickness of 1 micron as a templa...

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Abstract

The invention relates to a nanometer silver-modified opal and inverse opal-structured photonic crystal. Firstly, AgI sol is prepared by a sol-gel method; the AgI sol with better fluidity enters an opal-structured or inverse opal-structured gap under a capillary effect; then, the AgI easy to decompose is heated to decompose to nanometer silver; and finally, the nanometer silver-modified opal or inverse opal-structured photonic crystal is prepared, wherein the contained nanometer silver is not filled in the opal or inverse opal-structured gap, but grows and is uniformly distributed on an opal or inverse opal-structured skeleton, so that a three-dimensional ordered structure of the opal or inverse opal structure is kept, the defects of the nanometer silver-modified opal and inverse opal-structured photonic crystal are fewer, the area of the nanometer silver-modified opal and inverse opal-structured photonic crystal is larger to achieve firm combination with a substrate, and the application requirements of such fields as a high-performance optical device, a surface reinforced Raman spectrum detector, a sensor and a catalyst for the photonic crystal can be preferably satisfied.

Description

technical field [0001] The invention relates to a method for modifying opal and inverse opal structure photonic crystals with nanometer silver, and belongs to the technical field of photonic crystals. Background technique [0002] Photonic crystals are structures in which dielectric materials with different dielectric constants are arranged periodically in space. An important feature of photonic crystals is their photonic bandgap. The periodic arrangement of two dielectric materials with different dielectric constants produces a certain "potential field". When the difference between the dielectric constants of the two materials is large enough, Bragg scattering will appear on the dielectric interface, resulting in a photon band gap, energy Light that falls within the bandgap will not be able to propagate. The greater the difference between the dielectric constants of the two dielectric materials, the stronger the Bragg scattering, and the more likely the photonic band gap ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30B82Y40/00C30B29/18
Inventor 闫东伟武英周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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