No Cover Image

Journal article 652 views

Single walled carbon nanotube growth and chirality dependence on catalyst composition

A. Orbaek, A. Owens, C. Crouse, C. Pint, R. Hauge, A. Barron, Alvin Orbaek White Orcid Logo

Nanoscale, Volume: 5, Issue: 20, Start page: 9848

Swansea University Author: Alvin Orbaek White Orcid Logo

Full text not available from this repository: check for access using links below.

Check full text

DOI (Published version): 10.1039/c3nr03142j

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 ve...

Full description

Published in: Nanoscale
ISSN: 2040-3364 2040-3372
Published: Royal Society of Chemistry ($lbrace$RSC$rbrace$) 2013
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa32804
Tags: Add Tag
No Tags, Be the first to tag this record!
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.
College: College of Engineering
Issue: 20
Start Page: 9848