Oliphant, CJArendse, CJMalgas, GFMotaung, DEMuller, TFGKnoesen, D2009-11-122009-11-122009-10Oliphant, 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 5870-58731533-4880http://www.ingentaconnect.com/content/asp/jnn/2009/00000009/00000010/art00028http://hdl.handle.net/10204/3726Copyright: 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 5870-5873This 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.enTungsten filamentCarbon microcoilsTungsten catalystHot wire CVDHot-wire chemical vapour depositionCrystallinityNanoscienceSingle-helix carbon microcoilsNanotechnologyArticleOliphant, C., Arendse, C., Malgas, G., Motaung, D., Muller, T., & Knoesen, D. (2009). Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD. http://hdl.handle.net/10204/3726Oliphant, CJ, CJ Arendse, GF Malgas, DE Motaung, TFG Muller, and D Knoesen "Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD." (2009) http://hdl.handle.net/10204/3726Oliphant C, Arendse C, Malgas G, Motaung D, Muller T, Knoesen D. Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD. 2009; http://hdl.handle.net/10204/3726.TY - Article AU - Oliphant, CJ AU - Arendse, CJ AU - Malgas, GF AU - Motaung, DE AU - Muller, TFG AU - Knoesen, D AB - 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. DA - 2009-10 DB - ResearchSpace DP - CSIR KW - Tungsten filament KW - Carbon microcoils KW - Tungsten catalyst KW - Hot wire CVD KW - Hot-wire chemical vapour deposition KW - Crystallinity KW - Nanoscience KW - Single-helix carbon microcoils KW - Nanotechnology LK - https://researchspace.csir.co.za PY - 2009 SM - 1533-4880 T1 - Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD TI - Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD UR - http://hdl.handle.net/10204/3726 ER -