In-Situ TEM-STM Observations of SWCNT Ropes/Tubular TransformationsSingle-walled carbon nanotubes (SWCNTs) prepared by the HiPco process were purified using a modified gas phase purification technique. A TEM-STM holder was used to study the morphological changes of SWCNT ropes as a function of applied voltage. Kink formation, buckling behavior, tubular transformation and eventual breakdown of the system were observed. The tubular formation was attributed to a transformation from SWCNT ropes to multi-walled carbon nanotube (MWCNT) structures. It is likely mediated by the patching and tearing mechanism which is promoted primarily by the mobile vacancies generated due to current-induced heating and, to some extent, by electron irradiation.
Document ID
20110016092
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Sola, F. (NASA Glenn Research Center Cleveland, OH, United States)
Lebron-Colon, M. (NASA Glenn Research Center Cleveland, OH, United States)
Ferreira, P. J. (Texas Univ. Austin, TX, United States)
Fonseca, L. F. (Puerto Rico Univ. San Juan, Puerto Rico)
Meador, M. A. (NASA Glenn Research Center Cleveland, OH, United States)
Marin, C. (Puerto Rico Univ. San Juan, Puerto Rico)
Date Acquired
August 25, 2013
Publication Date
January 1, 2010
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
E-179631204-K10-026
Meeting Information
Meeting: Materials Research Society 2009 Fall Meeting