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Metallic carbon materials

United States Patent

5,993,697
November 30, 1999
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
Novel metallic forms of planar carbon are described, as well as methods of designing and making them. Nonhexagonal arrangements of carbon are introduced into a graphite carbon network essentially without destroying the planar structure. Specifically a form of carbon comprising primarily pentagons and heptagons, and having a large density of states at the Fermi level is described. Other arrangements of pentagons and heptagons that include some hexagons, and structures incorporating squares and octagons are additionally disclosed. Reducing the bond angle symmetry associated with a hexagonal arrangement of carbons increases the likelihood that the carbon material will have a metallic electron structure.
Cohen; Marvin Lou (Berkeley, CA), Crespi; Vincent Henry (Darien, IL), Louie; Steven Gwon Sheng (Berkeley, CA), Zettl; Alexander Karlwalter (Kensington, CA)
The Regents of the University of California (Oakland, CA)
08/ 649,143
May 14, 1996
This invention was made with U. S. Government support under Contract No. DE-AC03-76SF00098 between the U.S. Department of Energy and the University of California for the operation of Lawrence Berkeley Laboratory. The U. S. Government may have certain rights in this invention.