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Continuous growth of single-wall carbon nanotubes using chemical vapor deposition

United States Patent

October 7, 2008
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
The invention relates to a chemical vapor deposition process for the continuous growth of a carbon single-wall nanotube where a carbon-containing gas composition is contacted with a porous membrane and decomposed in the presence of a catalyst to grow single-wall carbon nanotube material. A pressure differential exists across the porous membrane such that the pressure on one side of the membrane is less than that on the other side of the membrane. The single-wall carbon nanotube growth may occur predominately on the low-pressure side of the membrane or, in a different embodiment of the invention, may occur predominately in between the catalyst and the membrane. The invention also relates to an apparatus used with the carbon vapor deposition process.
Grigorian; Leonid (Raymond, OH), Hornyak; Louis (Evergreen, CO), Dillon; Anne C (Boulder, CO), Heben; Michael J (Denver, CO)
Honda Motor Co., Ltd. (Tokyo, JP)
10/ 700,386
November 3, 2003
The United States Government has rights in this invention under Contract No. CRD-98-076 between the United States Department of Energy and the National Renewable Energy Laboratory, a Division of the Midwest Research Institute.