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Towards a ‘catalyst activity map’ regarding the nucleation and growth of single walled carbon nanotubes / Alvin W. Orbaek; Andrew Barron

Journal of Experimental Nanoscience, Volume: 10, Issue: 1, Pages: 66 - 76

Swansea University Author: Andrew, Barron

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DOI (Published version): 10.1080/17458080.2013.794979

Abstract

Quantification using SEM of single walled carbon nanotubes grown per unit area using a Co-Fe (50:50) catalyst system, prepared by the incorporation of the appropriate metal salts into a Spin-On Glass substrate, at 900 °C. The effects of substrate, as well as catalyst precursor concentration, were in...

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Published in: Journal of Experimental Nanoscience
Published: 2013
Online Access: http://www.tandfonline.com/doi/abs/10.1080/17458080.2013.794979
URI: https://cronfa.swan.ac.uk/Record/cronfa22196
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Abstract: Quantification using SEM of single walled carbon nanotubes grown per unit area using a Co-Fe (50:50) catalyst system, prepared by the incorporation of the appropriate metal salts into a Spin-On Glass substrate, at 900 °C. The effects of substrate, as well as catalyst precursor concentration, were investigated. SWNT growth density is maximised with a catalyst precursor concentration associated with the formation of catalyst nanoparticles of a critical size for SWNT nucleation. Samples were subjected to secondary growth, using a range of hydrogen:methane ratios to determine the optimum precursor composition. It was found that nucleation and growth stages are optimal under different conditions. Optimum conditions for nucleation resulted in >10× increase in SWNT density. Optimization is dependent on temperature and the partial pressure of reagent gas species.
College: College of Engineering
Issue: 1
Start Page: 66
End Page: 76