Abstract
Surfactant-encapsulated double-wall carbon nanotubes (DWCNTs) synthesized by the high-pressure carbon monoxide decomposition (HiPco) process were separated by length and electronic characteristics using density gradient ultracentrifugation (DGU). To ensure our study focuses only on the behavior of DWCNTs, dispersed DWCNTs were first isolated following the method of Green et al. [Green, A. A.; Hersam, M. C. Nat. Nanotechnol. 2008, 264, 1], utilizing the differences in buoyant density of DWCNTs from that of impurity single-wall carbon nanotubes (SWCNTs) and multiwall carbon nanotubes contained in the parent soot. By increasing the density difference between the nanotubes and the density gradient medium, we exploited the length-dependent translation of the nanotubes in response to applied centrifugation to isolate narrow length distribution DWCNT fractions. The length-dependent intrinsic optical response of DWCNTs is consistent compared with the previously reported values for SWCNTs. The controlled addition ...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
