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HIGH QUALITY LARGE SCALE SINGLE AND MULTILAYER GRAPHENE PRODUCTION BY CHEMICAL VAPOR DEPOSITION

United States Patent Application

20130174968
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Systems and methods for synthesizing continuous graphene sheets are provided. The systems and methods include passing a catalyst substrate through a heated chemical vapor deposition chamber and exposing the substrate to a reaction gas mixture of hydrogen and hydrocarbon at a preselected location within the chamber. The reaction gas mixture can include hydrogen having a partial pressure of between about 0 Torr and 20 Torr, hydrocarbon having a partial pressure of between about 20 mTorr and about 10 Torr, and one or more buffer gases. The buffer gases can include argon or other noble gases to maintain atmospheric pressure within the chemical deposition chamber. The resulting graphene can be made with continuous mono and multilayers (up to six layers) and have single crystalline hexagonal grains with a preselected nucleation density and domain size for a range of applications.
Vlassiouk, Ivan V. (Oak Ridge, TN), Smirnov, Sergei N. (Las Cruces, NM), Peter, William H. (Knoxville, TN), Sabau, Adrian S. (Knoxville, TN), Dai, Sheng (Knoxville, TN), Fulvio, Pasquale F. (Oak Ridge, TN), Ivanov, Ilia N. (Knoxville, TN), Lavrik, Nickolay V. (Knoxville, TN), Datskos, Panagiotis G. (Knoxville, TN)
UT-Battelle, LLC (Oak Ridge TN)
13/ 734,823
January 4, 2013
[0001] This invention was made with government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.