Method of making biopolymer-based nonlinear optical materials
US5512218A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1994 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Mar 24, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0079
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A biopolymer film and other materials that exhibit nonlinear optical (NLO) properties and a method for making this film. Alignment of biopolymer molecules, which is required for NLO phenomena, is achieved by application of an electric field parallel to the surface of a biopolymer solution as the film is formed. In one embodiment, a solution of poly(.gamma.-benzyl-L-glutamate), PBLG, in methylene chloride is employed. Upon application of an electric field, laminar structures perpendicular to both the field direction and to the film surface are formed. These ordered structures are captured in the film upon evaporation of the biopolymer solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.