Author:Kganyago, KR; Ngoepe, PEDate:Nov 2003The lattice properties and electronic structure of graphite and LiC6 within the most widely used density-functional theory implementation, the local density approximation (LDA) are calculated. Improvements to the LDA in the form of a generalized ...Read more
Author:Mlowe, S; Osman, NSE; Moyo, T; Mwakikunga, Bonex W; Revaprasadu, NDate:Sep 2017Iron sulfide nanoparticles Fe3S4 and Fe1-xS were synthesized via solvothermal decomposition of piperidine iron(III) dithiocarbamate complex in oleylamine. At a reaction temperature of 230 °C, the cubic Fe3S4 phase (greigite) was obtained ...Read more
Author:Dejene, FB; Roro, Kittessa T; Koao, LFDate:Jul 2012Recently, by combining a blue indium gallium nitride (InGaN) light emitting diodes (LED) with yellow Ce-doped Y3Al5O12 (YAG) phosphore, different groups have successfully demonstrated white LEDs. The production of white light was made possible ...Read more
Author:Ocwelwang, A; Sithole, Bishop B; Ramjugernath, D; Chunilall, VirenDate:Sep 2015Understanding the structure of cellulose is of utmost importance in order to enhance its accessibility and reactivity to chemical processing. Therefore, the aim of this study was to evaluate the effect of ultrasound pretreatment on the structure ...Read more
Author:Motaung, DE; Malgas, GF; Arendse, CJ; Mavundla, SE; Knoesen, DDate:Jul 2009Regioregular poly(3-hexylthiophenes) (P3HTs) and its blends were studied regarding their structural and photo-physical properties using fullerene as an electron acceptor material. Photo-physical and structural characteristics of the polymer ...Read more
Author:Reddy, P; Lekha, P; Reynolds, W; Kirsch, CDate:May 2015Untreated sugarcane bagasse and sugarcane bagasse pretreated with flow-through liquid hot water (LHW) treatment (170-207°C and 204-250 ml/min) in a fixed-bed reactor have been structurally characterised. Field emission gun scanning electron ...Read more
Author:De Picciotto, LA; Adendorff, KT; Liles, DC; Thackeray, MMDate:Aug 1993The crystal structures of Li1.2V3O8 and a lithiated product Li4.0V3O8 have been determined by single-crystal X-ray diffraction methods. The structure refinement of Li1.2V308 confirms that of Li1+xV3O8(x almost-equal-to 0) reported by Wadsley ...Read more
Author:Sinha Ray, J; Sinha Ray, SuprakashDate:Feb 2018The performance of a heterogeneous material, such as polymer nanocomposites (PNCs) is dictated by three main factors: (i) the inherent properties of the components; (ii) interfacial interactions; and (iii) structure of the PNCs. The structure ...Read more
Author:Grieve, G; Gouws, SDate:Apr 2010During the manufacture of Portland-type cements, significant emissions of carbon dioxide occur, some of which comes from the burning of fuel in the kiln, and the balance from the chemical dissociation of limestone (CaCO3). In South Africa the ...Read more
Author:Keet, CM; Fillotrani, PRDate:Sep 2013Software interoperability may be achieved by using their respective
conceptual data models. However, each model may be represented
in a di erent conceptual data modelling language for the tool's
purpose or due to legacy issues. Several ...Read more
Author:Staphorst, L; Pretorius, L; Pretorius, TDate:Jul 2013Technology Intelligence (TI) involves the process of capturing technology related data, converting this data into information by determining relational connections and refining information to produce knowledge that can guide strategic decision ...Read more
Author:Oliphant, CJ; Arendse, CJ; Prins, SN; Malgas, GF; Knoesen, DDate:Mar 2012In this study we investigate the structural changes of a burnt-out tantalum filament that was operated at typical hydrogenated nanocrystalline silicon synthesis conditions in our hot-wire chemical vapour deposition chamber. Scanning electron ...Read more
Author:Bembe, MJ; Clarke, W; Lysko, Albert ADate:Nov 2010Phased array antenna’s radiation pattern can be electronically controlled, which makes them relevant solution for multipath interference. Electronically Steerable Parasitic Array Radiator (ESPAR) antenna systems are part of the family of ...Read more
Author:Mahladisa, MA; Ackermann, L; Ngoepe, PEDate:Sep 2005A series of gold clusters consisting of aggregates of from 13 to 147 atoms was studied using the Sutton-Chen type many-body potential in molecular dynamics simulations. The properties of these clusters at temperatures from 10 K to 1000 K were ...Read more
Author:Tshwane, David M; Modiba, RosinahDate:Jul 2022TiAlV intermetallic alloys are used as key functional materials in various industries due to their superior properties. However, our understanding of their structural phase stabilities is still limited and remains confined. In this work density ...Read more
Author:Saasa, Valentine R; Mukwevho, E; Mwakikunga, Bonex WDate:Sep 2016There has been tremendous interest in ZnO as well as carbon materials; these are already in various technological devices. Work on the combination of ZnO and carbon materials is gaining interest [8-10] since these composites benefit from the ...Read more
Author:Kabongo, GL; Mhlongo, Gugu H; Mothudi, BM; Hillie, Kenneth T; Mbule, PS; Dhlamini, MSDate:Jul 2017In the present study, a succession of thulium (Tm)-doped zinc oxide (ZnO) nanostructures samples were prepared by sol-gel method using zinc acetate dihydrate, thulium nitrate pentahydrate and sodium hydroxide species with absolute ethanol as ...Read more