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HRTEM of Initial Oxidation of Carbon Nanotube Tips

Published online by Cambridge University Press:  02 July 2020

V. Lordi  and
N. Yao
V. Lordi
Affiliation:
Princeton Materials Institute, Princeton University, 70 Prospect Avenue, Princeton, NJ08540-5211
N. Yao
Affiliation:
Princeton Materials Institute, Princeton University, 70 Prospect Avenue, Princeton, NJ08540-5211
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High resolution transmission electron microscopy (HRTEM) and diffraction technique, with their high sensitivity to small variations in periodic structure or lattice imperfections within individual crystals, have made it possible to relate nanostructure to physical properties of individual fullerenes(C60, C70, etc.) and carbon nanotubes. Using HRTEM imaging, in tandem with dynamic image simulation, we have examined the etching patterns of carbon nanotubes in terms of tip geometry and bond strains. Our studies indicate that the progression of oxidation is not random, and is fully determined by the tip structure, of which only a finite number of classes exist. Oxidation of carbon nanotubes prefers to start at the positions which are most strained, which is associated with the arrangement of pentagons.

Carbon nanotubes were synthesized using the carbon arc method similar to that used for the synthesis of fullerences. The carbon nanotubes are often capped by carbon shells that fit continuously on the ends of the long cylinder

Type
Nanocrystals and Nanocomposites: Novel Structures for Catalysis, Electronics, and Micromechanics
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 421 - 422
Copyright
Copyright © Microscopy Society of America 1997

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This work was supported by the MSREC program of the NSF under Award Number DMR-940032.Google Scholar