Preparation method of molecular colloidal photonic crystal beads

A colloidal photonic crystal and microbead technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve problems such as limiting the practical application of colloidal photonic crystal microbeads, and achieve integration and miniaturization, particle size distribution Uniform, reproducible results

Inactive Publication Date: 2013-09-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the photonic crystal microbeads that have been reported have many structures such as spherical, annular, and crescent shapes. However, colloidal photonic crystal microbeads with such structures can only allow a single microbead to have a photonic crystal structural color, that is, structural color. The singleness of colloidal photonic crystal beads greatly limits the practical application of colloidal photonic crystal beads. Therefore, how to construct microbeads with integrated multi-structural units becomes the key to expand the application field of photonic crystal beads.

Method used

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  • Preparation method of molecular colloidal photonic crystal beads
  • Preparation method of molecular colloidal photonic crystal beads
  • Preparation method of molecular colloidal photonic crystal beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Configure the dispersion of monodisperse polystyrene microspheres with a particle size of 226nm and a mass fraction of 30% as the first dispersed phase. After the dispersion is sucked into the syringe, it is connected to a micro-injection pump and the flow rate is set at 0.2mL h -1

[0035] 2. Configure the EO3-TMPTA solution mixed with 0.2wt% ferric oxide nanoparticles as the second dispersed phase, draw the solution into the syringe and connect it to a micro-injection pump to set the flow rate to 0.2mL h -1

[0036] 3. Select methyl silicone oil as the continuous phase solution, and connect it to a micro-injection pump after sucking it into a syringe, and set the flow rate to 2mL h -1

[0037] 4. Start the three-phase microfluidic device: After the continuous phase methyl silicone oil is completely filled with the soft rubber tube, start the injection pumps of the two dispersed phases at the same time. After the flow rate is stable, a stable and uniform droplet t...

Embodiment 2

[0042] 1. Configure the dispersion of monodisperse silica microspheres with a particle size of 300nm and a mass fraction of 30% as the first dispersed phase, draw the dispersion into a syringe and connect it to a micro-injection pump and set the flow rate to 0.2mL h -1

[0043] 2. Configure the EO3-TMPTA solution mixed with 0.2wt% ferric oxide nanoparticles as the second dispersed phase, draw the solution into the syringe and connect it to a micro-injection pump to set the flow rate to 0.2mL h -1

[0044] 3. Select base silicone oil as the continuous phase solution, and connect it to a micro-injection pump after sucking it into a syringe, and set the flow rate to 2mL h -1

[0045] 4. Start the three-phase microfluidic device: After the continuous phase methyl silicone oil is completely filled with the soft rubber tube, start the injection pumps of the two dispersed phases at the same time. After the flow rate is stable, a stable and uniform droplet template with a double-sid...

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Abstract

The invention discloses a preparation method of molecular colloidal photonic crystal beads. The molecular colloidal photonic crystal beads prepared through the method have the characteristics of adjustable particle size, controllable morphology, superior monodispersity and the like. The method comprises a step of constructing a three-phase micro-fluidic channel, a step of preparing a double-faced liquid drop template, a step of preparing solid-liquid coexistence Janus particles, and a step of preparing the molecular colloidal photonic crystal beads.

Description

technical field [0001] The invention relates to a method for preparing crystal microbeads, more specifically to a method for preparing molecular colloidal photonic crystal microbeads. Background technique [0002] Because of its unique assembly mechanism, colloidal photonic crystal beads not only have a long-range ordered hexagonal close-packed structure, but more importantly, they exhibit angle-independent optical consistency in macroscopic properties. This unique photonic bandgap feature makes it a new generation of smart materials, and has great application prospects in biological detection, optical devices, and chemical sensors. So far, the photonic crystal microbeads that have been reported have many structures such as spherical, annular, and crescent shapes. However, colloidal photonic crystal microbeads with such structures can only allow a single microbead to have a photonic crystal structural color, that is, structural color. The singleness of colloidal photonic cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B5/00C30B29/60C30B29/54
Inventor 陈苏尹苏娜王彩凤
Owner NANJING UNIV OF TECH
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