Aligned lyotropic chromonic liquid crystal films
US7294370B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2004 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Sep 27, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aligned film comprises a dried mixture of a lyotropic chromonic liquid crystal material and a dopant selected from the group consisting of dyes having a molecular weight within one order of magnitude of the liquid crystal material and block co-polymers. An example of an aligned film may be transparent to visible light but not transparent to polarized light in the ultraviolet and/or infra-red portions of the electromagnetic spectrum. A method of making an aligned lyotropic chromonic liquid crystal-based film comprises providing a mixture of a lyotropic chromonic liquid crystal material and a dopant in a solvent for the liquid crystal material, applying the mixture to a substrate, and removing the solvent to produce an aligned lyotropic chromonic liquid crystal-based film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.