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Fibers comprised of epitaxially grown single-wall carbon nanotubes, and a method for added catalyst and continuous growth at the tip

United States Patent

June 1, 2010
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
The present invention is directed to fibers of epitaxially grown single-wall carbon nanotubes (SWNTs) and methods of making same. Such methods generally comprise the steps of: (a) providing a spun SWNT fiber; (b) cutting the fiber substantially perpendicular to the fiber axis to yield a cut fiber; (c) etching the cut fiber at its end with a plasma to yield an etched cut fiber; (d) depositing metal catalyst on the etched cut fiber end to form a continuous SWNT fiber precursor; and (e) introducing feedstock gases under SWNT growth conditions to grow the continuous SWNT fiber precursor into a continuous SWNT fiber.
Kittrell; W. Carter (Houston, TX), Wang; Yuhuang (Houston, TX), Kim; Myung Jong (Houston, TX), Hauge; Robert H. (Houston, TX), Smalley; Richard E. (Houston, TX), Marek, legal representative; Irene Morin (Houston, TX)
William Marsh Rice University (Houston, TX)
11/ 291,449
December 1, 2005
FEDERALLY-SPONSORED RESEARCH This invention was made, in part, with support from the Dept. of Energy, Grant No. DE-AC05-000R22725.