Method for assembling multi-colloid photonic crystals through particle fluidization

A technology of colloidal photonic crystals and particle flow, applied in chemical instruments and methods, crystal growth, polycrystalline material growth, etc., can solve the problems of long assembly cycle, low efficiency, and complicated operation, and achieve short assembly cycle, high efficiency, The effect of easy operation

Inactive Publication Date: 2015-05-06
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the disadvantages of the above method are complex operation, long assembly cycle and low efficiency

Method used

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  • Method for assembling multi-colloid photonic crystals through particle fluidization
  • Method for assembling multi-colloid photonic crystals through particle fluidization
  • Method for assembling multi-colloid photonic crystals through particle fluidization

Examples

Experimental program
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Embodiment 1

[0028] Such as figure 1 As shown, the device used in the method for particle fluidization assembly of multi-component colloidal photonic crystals provided in this embodiment includes a constant interface liquid storage tank 1, a flow meter 2, a valve 3, a slow flow device 4, a distribution plate 5, a fluidized bed reaction Device 6, sump 7 and fixing device 8. The constant interface liquid storage tank 1 is sequentially connected with the flow meter 2, the valve 3 and the slow flow device 4 through pipelines; the distribution plate 5 is installed at the bottom of the fluidized bed reactor 6; The slow flow device 4 is installed under the distribution plate 5; the liquid collection tank 7 is installed on the top of the fluidized bed reactor 6. The distribution plate 5 has a plurality of small holes for uniformly dispersing the dispersion medium passed into the fluidized bed reactor 6 . The damper 4 is used to buffer the dispersion medium. The fixing device 8 is used to fix th...

Embodiment 2

[0057] The device used in the method for particle fluidization assembly of multi-component colloidal photonic crystals provided in this example is exactly the same as that used in Example 1.

[0058] The particle fluidized assembly PMMA / Fe that this embodiment provides 3 o 4 The method for composite multi-element colloidal photonic crystal comprises the following steps:

[0059] For example, two colloidal PMMA / Fe with the same particle size and different densities 3 o 4 The composite material crystal particles are dispersed in the dispersion medium, and the preparation containing PMMA / Fe 3 o 4 A dispersion of crystal particles, wherein the two PMMA / Fe 3 o 4 The total mass percent concentration of crystal particles is, for example, 1.0%; the two PMMA / Fe 3 o 4 The density of the crystal particles is eg 2000kg / m respectively 3 and 4000kg / m 3 , its shape is for example all spherical; Dispersion medium adopts such as distilled water; Use mechanical stirring or ultrasonic ...

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Abstract

The invention discloses a method for assembling multi-colloid photonic crystals through particle fluidization, which includes steps of preparing dispersing solution by dispersing colloidal-state crystal particles in a dispersing medium, wherein the colloidal-state crystal particles comprise a plurality kinds of colloidal-state crystal particles with different sedimentation velocities in the dispersing medium; adding the dispersing solution into a first container, and the dispersing medium into a second container; enabling the dispersing medium in the second container to flow into the first container from the bottom of the first container; controlling the flow velocity of the dispersing medium so that one part of the crystal particles is in a fluid-bed state, and the other part of the crystal particles is in a transport-bed state; stopping the flowing of the dispersing medium into the first container when the crystal particles in the first container are divided into two layers; and leaving the first container to stand so as to obtain the multi-colloid photonic crystals through the sedimentation of the crystal particles.

Description

technical field [0001] The invention relates to the technical field of photonic crystal assembly, in particular to a method for particle fluidized assembly of multiple colloidal photonic crystals. Background technique [0002] Photonic crystals refer to artificial periodic dielectric structures with photonic bandgap (PBG) properties. The so-called photonic bandgap means that waves in a certain frequency range cannot propagate in this periodic structure, that is, there is a "forbidden band" in this structure itself. Photonic crystal heterostructures with different periodic structures are called multi-element photonic crystals. Multi-element photonic crystals with several periodic structures are called several-element photonic crystals. [0003] Multi-component photonic crystals have many unique properties, so they are widely used in optics, telecommunications, computers, chemical production, drug development and biotechnology, etc. Optical microcavities with quality factor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/00C30B30/00
Inventor 张辉徐骁龙
Owner BEIJING JIAOTONG UNIV
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