Author:Motaung, DE; Makgwane, Peter R; Ray, SSDate:Jul 2015We report the chemical synthesis of various ZnO nanostructures and TiO2 nanoparticles and their dispersion in a P3HT matrix. The photoluminescence studies revealed improved charge transport in the active layer of the optimized TiO2 nanoparticles ...Read more
Author:Kebede, Mesfin A; Palaniyandy, NithyadharseniDate:Dec 2019One of the main and crucial components of a lithium-ion battery (LIB) is the anode, a negative electrode as equally significant as the cathode positive electrode. Anodes are typically characterized by delivering a high capacity with low ...Read more
Author:Kebede, Mesfin A; Zheng, Haitao; Ozoemena, KIDate:Jul 2016Metal oxides such as TiO(sub2), Li(sub4)Ti(sub5)O(sub12), SnO(sub2), SnO, M(sub2)SnO(sub4) (M=ZnM=Zn, Co, Mn, Mg), TMO (TM=MnTM=Mn, Fe, Co, Ni, or Cu), TM(sub3)O(sub4) (TM=CoTM=Co, Fe, or Mn), and lithium alloys Li–Sn, Li–Si are among the ...Read more
Author:Maake, Popoti J; Bolokang, Amogelang S; Arendse, CJ; Vohra, V; Iwuoha, EI; Motaung, DEDate:Sep 2020The integration of noble metals nanostructures can be an effective method to improve the performance of organic solar cells by scattering the incident light that reaches the active layer. The resulting elongated active optical trail span of ...Read more
Author:Ozoemena, KI; Stefan-van Staden, RI; Nyokong, TDate:Jul 2009Novel electrochemical sensors based on carbon paste impregnated with metallopthalocyanine (MPc, M¼Co, Fe) complexes, have been constructed for the assay of anti-HIV drug 2’,3’-dideoxyinosine (didanosine, DDI). Both modified electrodes showed ...Read more
Author:Mathoho, Ipfi; Akinlabi, ET; Arthur, Nana KK; Tlotleng, Monnamme; Masina, Bathusile NDate:Mar 2019This study investigated the effect of laser peening on the surface integrity (surface roughness, microstructure and microhardness) of 17-4 PH stainless steel components which were built through the direct energy deposition (DED). Additive ...Read more
Author:Mutombo, KDate:Oct 2013Ti6Al4V laser manufactured samples were analysed using optical and scanning electron microscopy equipped with X-ray micro-analyser. The presence of a, a(sub2), ß, a', and a'' phases were determined using differential scanning calorimetry. The ...Read more
Author:Baisitse, TR; Botha, JR; Engelbrecht, JADate:Jul 2006Motivation for the research: Interest exists in III-V semiconducting materials (InAs, GaSb, InSb and related alloys) for the detection of infrared radiation; Such materials could be used as alternatives for future infrared detectors and various ...Read more
Author:Langmi, Henrietta W; Ren, Jianwei; Musyoka, Nicholas MDate:Aug 2015Over the past decade, hydrogen storage in metal-organic frameworks (MOFs) has received increasing attention worldwide because they possess versatile structures, high surface areas, large free volumes, ultrahigh porosities, and tunable pore ...Read more
Author:Pelly, SC; Parkinson, CJ; Van Otterlo, WAL; De Koning, CBDate:09 Dec 2005The metathesis reaction is used as a key step for the synthesis of the indolo [2,3-a] carbazole core of rebeccamycin 13 and the sulfur analog of furostifoline 21. Using the same methodology for the attempted synthesis of furostifoline, the ...Read more
Author:White, N; teWaterNaude, J; Van der Walt, A; Ravenscroft, G; Roberts, W; Ehrlich, RDate:Sep 2009Community concern about asthma prompted an epidemiological study of children living near a petrochemical refinery in Cape Town, South Africa. Because of resource constraints and the complexity of refinery emissions, neither direct environmental ...Read more
Author:Creedy, DP; Phillips, HRDate:Aug 1997This report reviews the state of knowledge on the occurrence, investigation, detection, monitoring, prevention and dispensation of methane layers in coal mines. Mining practice throughout the world in respect of methane layering is generally ...Read more
Author:Creedy, DPDate:Jun 1999The primary aim of the project was to assess the current status of research on methane emission prediction for collieries in South Africa in comparison with methods used and advances achieved elsewhere in the world.Read more
Author:Louw, EKDate:Dec 2013Electrochemical atomic layer deposition technique was chosen in this study for the deposition of platinum nanostructures onto various substrates such as carbon paper, nickel foam and titanium mesh. Electrochemical evaluation and morphological ...Read more
Author:Modibedi, Remegia M; Masombuka, T; Hietkamp, S; Mathe, Mahlanyane KDate:Jun 2009Pt-Ru-P was prepared by the chemical reduction method using sodium hypophoshite as a reducing agent on Vulcan XC 72 and multi-walled carbon nano-tubes (MWCNTs). Sodium citrate was added as the stabilizer during electro-catalyst preparation. ...Read more
Author:Mathe, Ntombizodwa R; Scriba, Manfred R; Coville, NJDate:Nov 2014Bimetallic Pt nanoparticles were prepared by alloying Pt with the non-noble transition metals, Co and Ni, using a conventional heat-treatment (HT) method and microwaveirradiation (MW). The resulting samples were PteCo-Ht, PteNi-HT, PteCo, MW ...Read more
Author:Kirton, A; Scholes, B; Archibald, SDate:Aug 2010Often researchers are interested in obtaining estimates of variables which are quite difficult or expensive to measure. To obtain these estimates, relationships between those variables of interest and more easily measured variables are used. ...Read more
Author:De Vries, M; Van der Merwe, A; Kotzé, Paula; Gerber, ADate:Dec 2011Staying competitive in the 21st century requires enterprise unity and integration, allowing for agility to accommodate swift changes in strategy as markets evolve and new opportunities emerge. The foundation for execution approach acknowledges ...Read more