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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5728

Title: Composition and crystallinity of silicon nanoparticles synthesised by hot wire thermal catalytic pyrolysis at different pressures
Authors: Scriba, MR
Britton, DT
Arendse, C
van Staden, MJ
Härting, M
Keywords: Thermal catalytic pyrolysis
Silicon nanoparticles
X-ray diffraction
X-ray photoelectron spectroscopy
Raman spectroscopy
Transmission electron microscopy
Issue Date: Apr-2009
Publisher: Elsevier
Citation: Scriba, MR, Britton, DT, Arendse, C, Van Staden, MJ and Härting, M. 2009. Composition and crystallinity of silicon nanoparticles synthesised by hot wire thermal catalytic pyrolysis at different pressures. Thin Solid Films, vol. 517(12), pp 3484-3487
Series/Report no.: Workflow;8763
Abstract: The effect of pressure on the structure and composition of silicon nanoparticles synthesized by hot wire thermal catalytic pyrolysis (HW-TCP) of pure silane has been investigated. Light brown powders were produced at silane pressures of 10 and 50 mbar, at a flow rate of 50 sccm, using a tungsten filament at temperatures of 1900 °C and 1800 °C respectively. As determined by transmission electron microscopy and X-ray diffraction, the particles produced at lower pressure have sizes around 10 nm, whereas those produced at higher pressure are typically 50 nm. High resolution transmission electron microscopy (HR-TEM) shows a surface layer of between 2 and 5 nm thickness, which was confirmed by X-ray photoemission spectroscopy to be an oxide shell. Both X-ray diffraction and HR-TEM confirm a high degree of crystallinity in both sets of particles, with Raman spectroscopy indicating an increase in crystalline fraction with synthesis pressure.
Description: Copyright: 2009 Elsevier. This is an ABSTRACT ONLY.
URI: http://www.sciencedirect.com/science/article/pii/S0040609009001047
http://hdl.handle.net/10204/5728
ISSN: 0040-6090
Appears in Collections:Nanotechnology
General science, engineering & technology

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