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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3726

Title: Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD
Authors: Oliphant, CJ
Arendse, CJ
Malgas, GF
Motaung, DE
Muller, TFG
Knoesen, D
Keywords: Tungsten filament
Carbon microcoils
Tungsten catalyst
Hot wire CVD
Hot-wire chemical vapour deposition
Crystallinity
Nanoscience
Single-helix carbon microcoils
Nanotechnology
Issue Date: Oct-2009
Publisher: American Scientific Publishers
Citation: Oliphant, CJ, Arendse, CJ, Malgas, GF et al. 2009. Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD. Journal of Nanoscience and Nanotechnology, Vol. 9(10), pp 5870-5873
Abstract: This paper reports on the deposition of crystalline single-helix carbon microcoils, in the as-deposited state, by the hot-wire chemical vapor deposition process without any special preparation of nano-sized transition metal catalysts and subsequent post-deposition annealing. Tungsten, originating from the heated tungsten filament, is identified as the catalyst material responsible for the growth of the microcoils. High-resolution transmission spectroscopy, combined with Raman spectroscopy, confirm that the as-deposited microcoils are crystalline, which is induced by the high deposition temperature in the vicinity of the heated filament. These results suggest a simplified, less tedious deposition process for the growth of carbon microcoils, once the process has been optimized.
Description: Copyright: 2009 American Scientific Publishers. This is the author's version of the work. It is posted here by permission of American Scientific Publishers for your personal use. Not for redistribution. The definitive version was published in the Journal of Nanoscience and Nanotechnology, Vol. 9(10), pp 5870-5873
URI: http://www.ingentaconnect.com/content/asp/jnn/2009/00000009/00000010/art00028
http://hdl.handle.net/10204/3726
ISSN: 1533-4880
Appears in Collections:National Centre for nano-structured materials
Nanotechnology
General science, engineering & technology

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