US Patent 7785557 - Transparent and electrically conductive graphene film

http://ip.com/patent/US7785557

Unidym is at the forefront of research and commercial development of carbon nanomaterials building upon the basic research conducted by Richard Smalley of Rice University. This latest patent encompasses transparent and electrically conductive graphene thin film material useful to constructing display and printable electronic technology. Claim 1 reads: 

1. A method of producing a film, comprising:

applying a dispersion comprising graphene flakes and a solvent to a surface of a substrate; and

removing the solvent from the dispersion such that the graphene flakes form an interconnected network;

wherein the graphene flakes are functionalized;

wherein the interconnected network has an optical transparency of at least 50%, and wherein the interconnected network is electrically conductive.