S-M Kim et al 2007 Nanotechnology 18 495606 doi:10.1088/0957-4484/18/49/495606
S-M Kim1,3, Y Zhang1, X Wang1, K B K Teo1, L Gangloff1, W I Milne1, J Wu2, M Eastman2 and J Jiao2
Show affiliationsThe low-temperature synthesis (450–560 °C) of single-walled carbon nanotubes (SWCNTs) on a triple-layered catalyst, Al/Fe/Mo, was performed using aromatic hydrocarbon radicals which were produced from the pyrolysis of C2H2. Two approaches were used; in the first, these hydrocarbon radicals were produced using a high-temperature heater (830 °C), but the substrate where the SWCNTs were grown was placed on a thermal insulator above it such that the substrate was at a much lower temperature. In the second approach, a heated nozzle system operating at 830 °C was used to introduce the hydrocarbon radicals onto the substrate which was located a few centimetres below it. Both these approaches rely on the thermal dissociation and recombination of C2H2 for the formation of complex high-order radicals, i.e. C6H9, C5H9, C6H13, whose presence was confirmed by in situ mass spectroscopy. The density of SWCNTs deposited could be correlated directly with the concentration of these precursors.
Issue 49 (12 December 2007)
Received 30 August 2007, in final form 14 October 2007
Published 8 November 2007
A Retraction for this article has been published in 2008 Nanotechnology 19 099801
S-M Kim et al 2007 Nanotechnology 18 495606
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