Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof
US7741416B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Nov 6, 2006 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Dec 15, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/811
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.