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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4913

Title: Formation of tungsten oxide nanostructures by laser pyrolysis: stars, fibres and spheres
Authors: Govender, M
Shikwambana, L
Mwakikunga, BW
Sideras-Haddad, E
Erasmus, RM
Forbes, A
Keywords: Laser pyrolysis
Hierarchical nanostructures
Tungsten trioxide
CO2-laser pyrolysis technique
Nanostructures
Fibres
Lasers
Issue Date: Jun-2010
Publisher: Springer
Citation: Govender, M, Shikwambana, L, Mwakikunga, BW et al. 2011. Formation of tungsten oxide nanostructures by laser pyrolysis: stars, fibres and spheres. Nanoscale Research Letters, Vol. 6(166), pp 1-8
Series/Report no.: Workflow;5328
Abstract: This report focuses on the production of multi-phase WO3 and WO3-x (where x could vary between 0.2 and 0.33) nanostructures synthesized by CO2-laser pyrolysis technique at varying laser wavelengths (9.22-10.82 mm) and power densities (17-110 W/cm2). The average spherical particle sizes for the wavelength variation samples ranged between 113-560 nm and the average spherical particle sizes for the power density variation samples ranged between 108-205 nm. Synthesis of W3O8 (= WO2.67) stars by this method is reported for the first time at a power density and wavelength of 2.2 kW/cm2 and 10.6 mm, respectively. It was found that more concentrated starting precursors result in the growth of hierarchical structures such as stars, whereas dilute starting precursors result in the growth of simpler structures such as wires.
Description: Copyright: 2010 Springer. This is a pre print version of the work. The definitive version is published in Nanoscale Research Letters, Vol. 6 (166)
URI: http://www.nanoscalereslett.com/content/pdf/1556-276X-6-166.pdf
http://hdl.handle.net/10204/4913
ISSN: 1931-7573
Appears in Collections:Nanotechnology
Open source
Sensor science and technology
General science, engineering & technology

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