Electrohydrodynamically patterned colloidal crystals
US6533903B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2001 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Apr 26, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B30/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for assembling patterned crystalline arrays of colloidal particles using ultraviolet illumination of an optically-sensitive semiconducting anode while using the anode to apply an electronic field to the colloidal particles. The ultraviolet illumination increases current density, and consequently, the flow of the colloidal particles. As a result, colloidal particles can be caused to migrate from non-illuminated areas of the anode to illuminated areas of the anode. Selective illumination of the anode can also be used to permanently affix colloidal crystals to illuminated areas of the anode while not affixing them to non-illuminated areas of the anode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.