Title
Direct evidence for the existence of multi-walled carbon nanotubes with hexagonal cross-sections Direct evidence for the existence of multi-walled carbon nanotubes with hexagonal cross-sections
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Oxford ,
Subject
Physics
Chemistry
Source (journal)
Carbon. - Oxford
Volume/pages
50(2012) :7 , p. 2524-2529
ISSN
0008-6223
ISI
000303038400015
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Carbon nanotubes (CNTs) with a polygonal cross-section have been paid increasing attention since their three-dimensional structure is related to specific physical properties, which are found to be different in comparison to CNTs with a circular cross-section. Here, we report the existence of novel multi-walled CNTs yielding walls with a rounded-hexagonal configuration. This structure was directly confirmed for the first time by both cross-sectional transmission electron microscopy and electron tomography. The morphology of the Fe catalytic particle also exhibits hexagonal characteristics, and is proposed as the origin of the formation of the rounded-hexagonal walls of the CNT. This observation is of great importance with respect to the design of polygonal (such as pentagonal or hexagonal) cross-sectional CNTs. By controlling the morphology of the catalytic nanoparticles it will be possible to grow CNTs with desired electronic and mechanical properties.
E-info
https://repository.uantwerpen.be/docman/iruaauth/0ac615/ca0cdb08b40.pdf
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