United States Patent | 5,346,683 |
Green, et. al. | Sept. 13, 1994 |
Inventors: | Green; Malcolm L. H. (Oxford, GBX); Tsang; Shik C. (Oxford, GBX). |
Assignee: | Gas Research Institute (Chicago, IL). |
Appl. No.: | 037,573 |
Filed: | Mar. 26, 1993 |
Intl. Cl.: | D01F 9/12; |
U.S. Cl.: | 423/447.2; 422/312.; |
Field of Search: | 367;376;377;371 |
5,094,906 | Mar., 1992 | Witzke et al. | 428/220 |
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Uncapped and thinned carbon nanotubes are produced by reaction with a flowing reactant gas capable of reaction selectively with carbon atoms in the capped region of nanotubes. The uncapped and thinned nanotubes provide open compartments for insertion of chemicals and exhibit enhanced surface area with modified physical and chemical properties.