Method of self-assembly and optical applications of crystalline colloidal patterns on substrates
US7758919B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Nov 7, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2462
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
This invention describes methods of synthesis and applications of a composite material of a colloidal crystal and a substrate. The method includes steps of (a) providing a substrate having a surface with a surface relief pattern; and (b) applying a liquid dispersion containing colloidal particles onto the surface and spinning the substrate whereby colloidal particles are swept across the surface and self-assemble in void spaces on the surface defined by the relief pattern. The resulting composite material (substrate with colloidal crystal) may be used in various applications such as chromatography, for use in lab-on-chip based devices, micro-reactors and the like. The material may be infiltrated by a material and the composite inverted to remove the colloidal particles to produce an inverted colloidal crystal pattern on the substrate. The material may be selected such that the inverted colloidal crystal pattern is a photonic crystal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.