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Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof

A technology of colloidal photonic crystals and nanoparticles, applied in nanotechnology, colloid chemistry, colloid chemistry, etc., can solve problems such as difficult commercial applications

Active Publication Date: 2007-10-24
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of defects caused by such volume shrinkage, a method of using liquid metal with fluidity as a substrate component can be adopted, but the problem is that it is difficult for commercial application [Griesebock et al., Chem mater., 14, 4023 (2002) ]

Method used

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  • Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof
  • Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof
  • Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof

Examples

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Embodiment 1

[0055] In the colloidal nanoparticle solution, water was used as a dispersion medium, and polystyrene spherical particles with a diameter of 460 nm were used as nanoparticles.

[0056] Polystyrene particles with a diameter of 460 nm were dispersed in water at 0.5 weight percent, and then 0.21 weight percent of polyvinylpyrrolidone as a viscoelastic material was dissolved in the colloidal nanoparticle solution. After the substrate was placed in the solution, the dispersion medium was evaporated in an oven at 60° C., thereby producing a colloidal photonic crystal.

[0057] As shown in Figure 2, this was confirmed by scanning electron microscopy observations.

Embodiment 2

[0059] A photonic crystal was prepared by the same method as in Example 1 except that 0.63 weight percent of polyvinylpyrrolidone was used as the viscoelastic material. As shown in Figure 3, this was confirmed by scanning electron microscopy observations.

Embodiment 3

[0061] A photonic crystal was prepared by the same method as in Example 1, except that 0.63 weight percent of polyacrylic acid was used as the viscoelastic material.

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Abstract

The present invention relates to colloidal photonic crystals using colloidal nanoparticles and a method for the preparation thereof, wherein by adding a viscoelastic material into a solution containing the colloidal nanoparticles when preparing the colloidal photonic crystals, a uniform volume contraction occurs due to the elasticity of the viscoelastic material even when a nonuniform volume contraction occurs while drying a dispersion medium in the colloidal solution. Thus, it is possible to prepare 2 or 3 dimensional colloidal photonic crystals of large scale with no defects in less time.

Description

technical field [0001] The present invention relates to colloidal photonic crystals using colloidal nanoparticles and a preparation method thereof, and more particularly, the present invention relates to colloidal photonic crystals using colloidal nanoparticles and a preparation method thereof, wherein by adding a viscoelastic material, even in a dry colloidal solution Inhomogeneous volume shrinkage occurs in the dispersion medium, and uniform volume shrinkage also occurs due to the elasticity of the viscoelastic material. Therefore, 2 or 3-dimensional large-sized colloidal photonic crystals with no defects on their surface and no particle size limitation can be prepared in a short period of time. Background technique [0002] A photonic crystal is a crystal having a regular structure with a lattice pitch of tens of nanometers to several micrometers, and is capable of adjusting optical properties in the ultraviolet, visible and infrared ranges. Such photonic crystals exist ...

Claims

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Application Information

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IPC IPC(8): B01J13/00
CPCB01J13/00B82Y40/00
Inventor 洪瑛晙任相赫
Owner LG CHEM LTD
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