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Hot wire production of single-wall and multi-wall carbon nanotubes

United States Patent

7,820,132
October 26, 2010
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
Apparatus (210) for producing a multi-wall carbon nanotube (213) may comprise a process chamber (216), a furnace (217) operatively associated with the process chamber (216), and at least one filament (218) positioned within the process chamber (216). At least one power supply (220) operatively associated with the at least one filament (218) heats the at least one filament (218) to a process temperature. A gaseous carbon precursor material (214) operatively associated with the process chamber (216) provides carbon for forming the multi-wall carbon nanotube (213). A metal catalyst material (224) operatively associated with the process (216) catalyzes the formation of the multi-wall carbon nanotube (213).
Dillon; Anne C. (Boulder, CO), Mahan; Archie H. (Golden, CO), Alleman; Jeffrey L. (Lakewood, CO)
Alliance for Sustainable Energy, LLC (Golden, CO)
10/ 548,924
20060099136
March 13, 2003
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. DE-AC36-99GO10337 between the U.S. Department of Energy and the Midwest Research Institute.