Author:Knoesen, D; Arendse, C; Halindintwali, S; Muller, TDate:Jan 2008One of the prime components of a hot-wire (Cat) Chemical Vapor Deposition system is the filament used to pyro-catalytically crack the gases like silane. Burnt out tantalum filaments were studied to determine the possible improvement of lifetime ...Read more
Author:Yalisi, B; Katumba, G; Forbes, A; Pillay, SRDate:Jun 2009Selective solar absorbers are devices that have been designed to absorb as much as possible of the solar radiation which is in the wavelength range of 0.3 to 2.5 µm and to minimise thermal emittance in the wavelength range from 2.5µm to the ...Read more
Author:Oliphant, CJ; Arendse, CJ; Knoesen, D; Muller, TFG; Prins, S; Malgas, GFDate:May 2011The authors report on the growth kinetics of hydrogenated nanocrystalline silicon, with specific focus on the effects of the deposition time and hydrogen dilution on the nano-structural properties. The growth in the crystallite size, attributed ...Read more
Author:Bello, A; Fabiane, M; Dodoo-Arhin, D; Ozoemena, KI; Manyala, NDate:Jan 2014Silver metal nanoparticles were decorated by electron beam evaporation on graphene foam (GF) grown by chemical vapour deposition. X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopy, and atomic force microscopy ...Read more
Author:Swartbooi, Ashton M; North, Brian CDate:Nov 2008Current methods employed to synthesise carbon nanotubes (CNTs) include hot-wire chemical vapour deposition (CVD) techniques as well as laser ablation. These methods however produce small amounts of nanotubes at a high production cost. The use ...Read more
Author:Labuschagne, Philip W; Moolman, FSDate:Nov 2011This presentation compiles a summary of current technologies to improve oxygen barrier properties of plastics.Read more
Author:Arendse, CJ; Knoesen, D; Britton, DTDate:Apr 2006The material properties of hydrogenated amorphous silicon (a-Si:H) have been known to change when exposed to elevated temperatures. In this work the authors report on the thermal stability of the structural disorder, hydrogen content and ...Read more
Author:Kesavan Pillai, Sreejarani; Matlhoko, L; Arendse, C; Ray, SS; Moodley, MDate:Mar 2009Multi-walled carbon nanotubes (MWCNTs) were synthesized by a chemical vapour deposition method. The effect of calcination at temperatures ranging from 300 to 550°C in exposing the metal nanoparticles within the nanotube bundles was studied. ...Read more