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Issue 20, 2013
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Single walled carbon nanotube growth and chirality dependence on catalyst composition

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Abstract

Vertical arrays of single walled carbon nanotubes (VA-SWNTs) were grown using bi-metallic nanoparticle pro-catalysts. Iron oxide particles were doped with varying quantities of first row transition metals (Mn, Co, Ni, and Cu) for a comparative study of the growth of nanotubes. VA-CNT samples were verified using scanning electron microscopy, and characterized using resonance Raman spectroscopy. The length of the VA-CNTs is used as a measure of catalyst activity: the presence of dopants results in a change in the CNT length and length distribution. Cross correlation of the Raman spectra reveal variations in the distribution of radial breathing mode peaks according to the pro-catalyst composition. The formation of various chirality nanotubes is constant between repetitive runs with a particular catalyst, but may be controlled by the identity and concentration of the metal dopants within the iron catalyst. These results demonstrate that the composition of the catalyst is a major driving force toward type selective growth of nanotubes.

Graphical abstract: Single walled carbon nanotube growth and chirality dependence on catalyst composition

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Supplementary files

Article information


Submitted
18 Jun 2013
Accepted
06 Aug 2013
First published
14 Aug 2013

Nanoscale, 2013,5, 9848-9859
Article type
Paper

Single walled carbon nanotube growth and chirality dependence on catalyst composition

A. W. Orbaek, A. C. Owens, C. C. Crouse, C. L. Pint, R. H. Hauge and A. R. Barron, Nanoscale, 2013, 5, 9848
DOI: 10.1039/C3NR03142J

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