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Purification of carbon nanotubes via selective heating

United States Patent

9,825,229
November 21, 2017
View the Complete Patent at the US Patent & Trademark Office
The present invention provides methods for purifying a layer of carbon nanotubes comprising providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein the precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes; selectively heating the first carbon nanotubes; and separating the first carbon nanotubes from the second carbon nanotubes, thereby generating a purified layer of carbon nanotubes. Devices benefiting from enhanced electrical properties enabled by the purified layer of carbon nanotubes are also described.
Rogers; John A. (Champaign, IL), Wilson; William L. (Champaign, IL), Jin; Sung Hun (Urbana, IL), Dunham; Simon N. (Atlanta, GA), Xie; Xu (Urbana, IL), Islam; Ahmad (Beavercreek, OH), Du; Frank (Urbana, IL), Huang; Yonggang (Glencoe, IL), Song; Jizhou (Hangzhou, CN)
The Board of Trustees of the University of Illinois (Ubana, IL), Northwestern University (Evanston, IL), University of Miami (Miami, FL)
14/ 772,312
20160133843
April 3, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support awarded by the following agency: U.S. Department of Energy Grant DEFG02-91ER45439. The United States government has certain rights in the invention.