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In-situ TEM-STM Observations of SWCNT Ropes/tubular Transformations

Published online by Cambridge University Press:  31 January 2011

Franscisco Solá ,
Marisabel Lebrón-Colón ,
F. Ferreira ,
Luis F. Fonseca ,
Michael A. Meador  and
Carlos J. Marín
Franscisco Solá
Affiliation:
francisco.sola-lopez@nasa.gov, NASA Glenn Research Center, Structures and Materials Division, Cleveland, Ohio, United States
Marisabel Lebrón-Colón
Affiliation:
Marisabel.Lebron-Colon-1@nasa.gov, NASA Glenn Research Center, Polymers Branch, Cleveland, Ohio, United States
F. Ferreira
Affiliation:
ferreira@mail.utexas.edu, Univeristy of Texas, Austin, Texas, United States
Luis F. Fonseca
Affiliation:
luis.fonseca@upr.eduluis.upr@gmail.com, University of Puerto Rico, Physics, San Juan, Puerto Rico
Michael A. Meador
Affiliation:
Michael.A.Meador@grc.nasa.gov, NASA Glenn Research Center, Polymers Branch, Cleveland, Ohio, United States
Carlos J. Marín
Affiliation:
jcmarin@uprrp.edu, University of Puerto Rico, Mayaguez, Puerto Rico
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Abstract

Single-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.

Keywords

transmission electron microscopy (TEM)nanostructurephase transformation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1204: Symposium K – Nanotubes and Related Nanostructures-2009 , 2009 , 1204-K10-26
Copyright
Copyright © Materials Research Society 2010

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