Mr
BRADLEY NEMUTUDI
(University of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Computational modelling studies of platinum group minerals (PGM): sperrylite (PtAs2), platarsite (PtAsS) and palladoarsenide (Pd2As), were carried out to investigatate their stabilities and surfaces. These are paramount to the mining industry in South Africa as they are the most extracted minerals in the Platreef bushveld complex. In this study we employed the Vienna...
Ms
Christine Mkhonto
(University of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The Fe-rich part of the Fe-Al phase diagram has offered an overview regarding its capability as a replacement of steel in the application of intermetallic compounds. They are of excellent application in the energy sector, boilers, pipes and automotive parts. These compounds possess good mechanical properties, low density as well as accessibility of raw material. Thermodynamic stability phase...
Dr
phil ferrer
(wits)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Mr
Audrey Thabang Magabe
(University of the Witwatersrand)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
The Large Hadron Collider generates experimental data that consists of signal and background events. In order to further analyse the data, it is highly desirable to optimally discriminate between signal and background events. We conduct a comparative study between supervised and semi-supervised machine learning techniques in classifying between signal
and background events in H → γγ + χ decay channel.
Mr
Brian Ramogayana
(UL)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Over the last decade, energy storage became one of the greatest challenges mainly because of natural depleting recourses and enhanced technology. Several investigations have been made in the quest of alternative energy sources, which are renewable, rechargeable and sustainable to current technologies. Lithium-ion batteries appeared as a promising energy source in low-carbon electricity and...
Dr
Thabo Letsoalo
(University of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
There are several computational techniques and experimental studied minerals sulfides. Group of sulfides in nature and significant importance because they serve as a source of economic for many applications. We used parameterization technique to study chalcopyrite, pyrite, marcasite and sulfides minerals structures using a Density Functional based Tight-Binding (DFTB+). We developed sets of...
Ms
Prettier Maleka
(Council for Scientific and Industrial Research (CSIR))
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Energy storage devices such as rechargeable lithium-ion batteries are considered as reliable energy storage devices for portable electronic devices, electric vehicles and key enabling devices. This is due to their high energy density, lightweight, long lifetime, environmental benignity and high efficiency. In this work, we make use of hybrid density functional theory to study the electronic...
Mr
Hlanganani Nyembe
(Centre for HRTEM, Nelson Mandela University)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The focus of this study is to determine the suitability of TiZrN coatings as a means to enhance the oxidation resistance of zirconium-alloy fuel claddings for light water nuclear reactors. The TiZrN coatings were deposited onto flattened ZIRLO tube-sections with a cathodic arc vapour deposition technique. The characterisation was performed using scanning electron microscopy (SEM) and...
Ms
Gaopalelwe Motaung
(University of South Africa)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Polymer based nanocomposites have attracted a lot of attention in the semiconductor industry for many different applications such as sensors, solar cells, lighting and display, to name a few. Polyethylene Terephthalate (PET), an insulating polymer with electrical conductivity of up to 10-15 S.m-1 shows desirable electrical characteristics after ion implantation. In this work, 100keV Ti+ and...
Mrs
Ife Fortunate Elegbeleye
(University of Venda)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
A range of solution processed organic and hybrid organic−inorganic solar cells, such as dye-sensitized solar cells and bulk heterojunction organic solar cells have been intensely developed in the past two decades. TiO2 is widely employed as electron transporting material in nanostructured TiO2 perovskite-sensitized solar cells and semiconductor in dye sensitized solar cell. Understanding the...
Dr
Makhamisa Senekane
(Department of Physics and Electronics, National University of Lesotho, Roma, Lesotho)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
Differential privacy is a robust definition of privacy that provides mathematical guarantees to participants in a statistical database that their privacy would not be compromised. It has its roots in the field of theoretical computer science. It has since proven to be a golden standard of data privacy. Recently, the connection between this privacy framework and quantum information science has...
Ms
Nkateko Baloyi
(University of the Witwatersrand)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
The amount of data produced in the Large Hadron Collider requires modern techniques to improve the processing, classification and regression tasks. In this study, we develop machine learning algorithms that can learn patterns in the data and lead to accurate discrimination of Signal and Background in the search for new bosons decaying into Z + γ final state. The toolkit for multivariate...
Mr
Clinton Dlamini
(SMU)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Mixed phases of SrAl2O4/Sr3Al2O6/SrCO3:0.05% Gd3+ nanopowders were prepared via citrate sol-gel method. The effect of annealing temperature (AT) at the fixed dopant concentration (0.05Gd3+) on the structure, morphology and photoluminescence properties of the nanopowders were investigated. X-ray diffraction (XRD) showed that the prepared nanopowders consist of the mixture of monoclinic...
Mr
zuko Mthwesi
(Rhodes University)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Small punch creep testing (SPCT) is a small-scale short-term (<1000h) test that can be used to determine the remaining life of power plant materials. The mechanical property data generated by this new technique needs to be correlated to more established testing techniques such as uni-axial creep testing and ultimately to predictions regarding the remaining service life of the plant component....
Dr
Rosinah Modiba
(CSIR)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Improvements in energy efficiency and reduction of greenhouse gas emissions have been some of the central topics in recent years in environment and climate change. The advantages of using permanent magnets in many different types of electromagnetic drive and static magnetic field applications are compelling. It seems demand is bound to increase substantially in coming years. There are...
Dr
Bincy Susan Jacobs
(University Of Johannesburg)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Rare-earth orthochromites (RCrO3) with orthorhombically distorted perovskite (ABO3) structure exhibit a wealth of magnetic phenomena such as temperature-induced magnetization reversal (TMR), spin-reorientation (SR), spin-flipping (SF), and exchange-bias (EB). These occur as a result of magnetic interactions among the cations such as Cr3+–Cr3+, Cr3+–R3+ and R3+–R3+, where R is the rare earth...
Mr
Hesham Abdelbagi Ali Abdelbagi
(University of Pretoria)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The influence of swift heavy ion (SHI) irradiation on the microstructure and the strontium (Sr) migration behavior of Sr implanted into polycrystalline SiC were investigated using Rutherford backscattering spectrometry (RBS), Raman spectroscopy and scanning electron microscopy (SEM). The as-implanted and SHIs irradiated samples were vacuum annealed from 1100 to 1500 oC in steps of 100 oC for 5...
Mr
Justine Nyarige
(University of Pretoria)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Hematite films were deposited by chemical spray pyrolysis on fluorine doped tin oxide at elevated temperatures (250 - 400 ̊C). 0.05 M, 0.10 M and 0.15 M of iron(lll)chloride hexahydrate (FeCl3.6H2O) was used as precursors for hematite with nitrogen (N2) as the carrier gas. Scanning electron microscopy of the hematite films showed small grain sizes of < 100 nm, with a uniform distribution on...
Mr
Thokozane Moses Sithole
(University of South Africa)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Sithole TM and Moloi SJ
University of South Africa, Department of Physics, P.O. Box 392, Pretoria 0003,
South Africa.
Email: sthokozanemoses@gmail.com
Abstract: The aim of this paper is to improve the radiation-hardness of silicon diodes. The schottky diodes were fabricated on undoped and gadolinium doped p-type silicon. The electrical properties of the diodes were studied using the...
Ms
Ingrid Segola
(Tshwane University of Techonology/iThemba LABS)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
In this study, polyaniline thin films of various thicknesses on a silicon (Si) substrate were deposited by electrospinning polyaniline-emeraldine base (PANI (EB)) solution obtained by mixing PANI with the solvent DMSO (Di-methyl sulphur dioxide). Different thicknesses of the films were obtained by varying the spin coating time, while uniformity was investigated by varying spin coating speed....
Ms
Caroline Ratlhagane
(Sefako Makgatho Health Sciences University)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
n-type Silicon has been doped with tungsten particles at ion energies ranging from 50keV to 150keV, silicon was then characterised using Rutherford backscattering spectroscopy and depth profiling for the analysis of the doped material. Schottky barrier diodes were fabricated on the silicon doped with tungsten particles and those that are not doped, AuSb was used as an ohmic while Pd was used...
Ms
Pulane Mokoena
(University of South Africa)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Defects in silicon are intentionally introduced to improve properties of the material for fabrication of radiation detectors. These defects are introduced either by doping or irradiation of silicon. In trying to understand properties of these defects, it has been found that they interact with impurities naturally present in the silicon, oxygen, leading to a change in electrical properties of...
Ms
Pulane Mokoena
(University of South Africa)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Defects in silicon are intentionally and unintentionally introduced into the surface and bulk of silicon diodes. Defect engineering is the manipulation of the type, concentration, spatial distribution and mobility of defects within the material. This is done either by metal doping, impurity doping and by irradiation before the fabrication of the detector. These effects create a cascade of...
Mr
DIMA RATSHILUMELA STEV
(CSIR/UNIVEN)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The electronic structures and optical properties of brookite TiO2 (210) surfaces doped with transition metals (Ru and Pt) have been investigated by first-principles calculations based on the density functional theory employing generalized gradient approximation (GGA). The modelled surface structures were constructed from an optimized brookite bulk structure. TiO2 surfaces were doped with...
Mr
Kgwajana Barnard Molala
(UL)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Metal sulphides are important in many fields of science such as in metallurgy, materials science, geochemistry, physics, geology and chemistry. They serve as a source of the world’s precious metal-bearing minerals that are economically and industrially significant. The Bushveld Complex has the largest concentration of platinum group elements (PGEs) which are hosted in the base metal sulphides...
Ms
Moshibudi Ramoshaba
(University of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The equilibrium and electronic properties of the cubic copper sulphide are investigated using the full-potential all electrons first principle density functional theory. Convincing equilibrium and electronic properties are obtained using the GGA-PBEsol type exchange-correlation functional. Equilibrium properties suggest the mechanical stability with elastic anisotropy. The electronic band...
Ms
Tshidi Malibe
(University of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Li2MnO3 has been classified as an active intercalation host material for lithium ion batteries (LIBs) due to its large specific capacity. However, its degradation nature reported to be due to oxygen loss and phase transformation during cycling hinders its practical application. Furthermore, the mechanism behind the degradation has not been fully understood. As such, studying the crystal growth...
Mr
Nyiku Mahonisi
(University of Witwatersrand)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Solid-state based single photon systems are at the heart of the second quantum revolution. There is great interest in research focusing on structurally embedded color centers in diamond, particularly NV⁻ centers. It has been shown that the excitation of these color centers generate non-classical states on demand, applicable in quantum information processes. Consequently, the emission...
Mr
Elkana Rugut
(University of the Witwatersrand)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Thermoelectric materials can convert heat into electricity and thermoelectric devices can play an important role in the efficient use of energy. In this study, we investigate structural, dynamical and mechanical stability of LiYSe2 alongside its lattice thermal conductivity and thermoelectric properties for the first time. The ability of a material to be a applied as the active...
Dr
NDANDULENI LESLEY LETHOLE
(University of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Bimetallic FePt nanoparticles with L10 structure have recently gained a lot of consideration in practical applications for solid-state devices, storage of ultra-high density magnetic data and biomedicine. This is due to their high magnetic anisotropy, high magnetocrystalline anisotropy, high density, and high coercivity. These materials are also considered as nanocatalysts for...
Mr
Tshegofatso Michael Phaahla
(University of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Nanoscale clusters are considered a new phase of matter, being the bridge between atoms and the bulk. They form part of extensive research due to their various potential applications. There is considerable interest in the structures and properties of nanoscale clusters, for example, being used as finely divided metal catalysts, particularly for bimetallic clusters, which offer the opportunity...
Ms
Mamogo Masenya
(iThemba LABS/University of the Western Cape)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Silicon Carbide (SiC) nanostructures are well known for their superior mechanical properties, high thermal conductivity, low thermal-expansion coefficient, good thermal-shock resistance, chemical stability, and electron affinity which make them excellent candidates for work in harsh environments [1]. Silicon carbide nanoparticles were grown via thermal annealing of electron-beam deposited...
Mr
Dakalo Mashamba
(Tshwane University of Technology)
, Dr
Mandla Msimanga
(Tshwane University of Technology)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Ion Beam Analysis is a suite of techniques used to determine elemental composition and depth profiles of thin film structures. The effectiveness of the analysis is expected to improve with the use of heavy ions due to higher cross sections (such as stopping force and X-ray production). In this project a comparison will be done between analysis with heavy ions and with light ions. The analysis...
Mr
Grant Tshepo Mafa
(Tshwane University of Technology, Department of Physics, P Bag X680, Pretoria 001,South Africa & iThemba LABS TAMS, National Research Foundation, P. Bag 11, WITS 2050, Johannesburg, South Africa)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Heavy ions in Ion Beam Analysis techniques (IBA) such as MeV SIMS are sometimes limited in their application due to lack of experimental fundamental ion-atom interaction data. We report on an investigation carried out to measure heavy ion beam sputtering yields due to irradiation and irradiation effects on physical properties of Transparent Conducting Oxides (TCOs) at MeV energies....
Ms
Mahlatse Manamela
(University of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The undoped, 5 % (In or Co) single and (In and Co) double doped ZnO nanoparticles have been successfully synthesised using the ball milling technique. The kenosistec station equipment was used to probe the sensing properties of the doped and undoped ZnO nanoparticles to H2S gas. The current versus time curves plotted for H2S gas, show that the undoped dominates sensitivity followed by the...
Mr
Tjatji Tjebane
(Necsa/UP)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Improving energy density in symmetric supercapacitors from optimized activated carbon using non-aqueous electrolytes
The formation mechanism of the porous framework in nanostructured carbon materials is important in a wide variety of applications such as in supercapacitors, gas storage, adsorbents and catalyst supports. The accessibility to the pore sites by electrolyte ions and gases are...
Ms
Velile Mnisi
(SMU)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The improvement for load bearing dental and orthopedic implants of Titanium based alloys have become significant in the medical industry, due to the increase of knee and hip replacement amongst younger individuals and the deterioration of body parts by increasing human age. Hence the need for developing low modulus Ti-based alloys with biocompatible properties and low elastic modulus close to...
Mr
Jean Jules Mboukam
(University of Johannesburg)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The intermetallic ternary compounds Dy2NiSi3 and Tm2NiSi3 crystallize in the AlB2 type of hexagonal structure with the space group P6/mmm. The magnetic properties were studied by measuring magnetization as a function of temperature (χ(T)), magnetic field (M(H)) and heat capacity (Cp(T)) in magnetic fields up to 7 T. Temperature dependent magnetization and heat capacity results revealed that...
Dr
SIMON OGUGUA
(UNIVERSITY OF THE FREE STATE)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Introduction
Keeping in mind that the unit cell of spinal ZnAl2O4 is made of tetrahedral and octahedral sites, of which upon doping shows different characteristics. Zn2+ occupies the tetrahedral sites, while Al3+ occupies the octahedral sites. When doped with Fe3+, ZnAl2O4 is characterized by two broad emissions with maxima around 485 and 730 nm [1]. To maintain electrical neutrality, charge...
Ms
P.M Mabidi
(University of Johannesburg)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
A polycrystalline sample of CeIrGa4 was prepared by an arc-melting technique using high-purity elemental constituent elements on a water-cooled copper plate under ultra-high pure argon atmosphere. This compound crystallizes in an orthorhombic structure having the CeOsGa4 structure type belonging to the space group Pmma [1]. The sample was characterized by powder X-ray diffraction spectra which...
Ms
Tasabeeh Alabid Osman Jafer
(University of Pretoria)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Migration behavior of palladium (Pd) in glassy carbon was investigated using Rutherford backscattering spectrometry (RBS), scanning electron microscopy (SEM) and Raman spectroscopy. Pd ions of 200 keV were implanted into glassy carbon samples to a fluence of 1×10^16 cm-2 at room temperature. Some of the implanted samples were annealed in temperature ranging from 100 to 1000 oC in steps of 100...
Ms
Abigail Phori
(ordinary member)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Cost-effectiveness and environmentally friendly nature of the transition metal oxides are some motivating factors for their exploration for use as energy storage devices applications when compared to other electrode materials. This work reports the successful synthesis of Ti3C2/NiO nanocomposite for application as supercapacitor electrodes. The as-synthesized material was characterized by...
Mr
Magopa Tshepho Mcdonald Kekana
(University of Limpopo)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
Point defects in cubic boron nitride are being investigated using the classical molecular dynamics and the rigid Tersoff potentials. In the process, the stability, the structural properties and lattice vacancies are being explored. The formulation uses the NVT Evans ensemble to obtain radial distribution functions and the defect energies for boron and nitrogen vacancies. Boron and nitrogen...
Ms
Betony Adams
(UKZN)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
In the mid-1990s Hameroff and Penrose proposed that quantum effects played a role in the nature of consciousness. The theory, known as orchestrated objective reduction, involves proteins called microtubules, which form part of the cytoskeleton of eukaryotic cells. The theory was largely dismissed due to the fact that quantum effects were thought unlikely to occur in biological systems, which...
Mr
Comfort Sekga
(Department of Physics and Astronomy, Botswana International University fo Science and Technology, Private Bag 16 Palapye, Botswana)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
Secret sharing is an information processing protocol for managing secret information over multiple parties. The information is distributed in a way that some subset of the parties referred to as the access structure can collaborate to recover the original secret information, but all other subsets of parties referred to as adversary structure gain no information on the secret even with...
Dr
Puleng Mbuyisa
(University of Zululand)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The absorption and desorption properties of ammonia gas on wurzite Zinc Oxide nanorods (ZnO NRs) and Zinc oxide-Carbon nanostructures (ZnO-CNs) hybrid where studies by fast acquisition x-ray photoemission spectroscopy (XPS). Chemiresistor sensors were made out of the ZnO NRs and ZnO-CNs hybrid and the sensors were exposed to ammonia gas at varies concentrations. Ammonia gas was found to...
Mr
Juvet Nche Fru
(University of Pretoria)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The interactions between aluminium, gold, silver, tin, gold/zinc metal electrodes with methylammonium lead tribromide perovskite were studied. The metals were deposited on the substrates by physical vapour deposition using a resistive evaporator. Likewise, methylammonium lead tri-bromide perovskite thin films were grown on the deposited metal films by sequential physical vapour deposition of...
Dr
Mofuti Mehlape
(University Of Limpopo)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Atomistic simulations were carried out to study the melting behaviour of pentlandite nanostructures, in order to understand their structural and dynamical properties. Pentlandite is a major precious metals-bearing mineral and plays a very important role in mining. Precious metal ores co-exists with base metals either as solid-solution and intergrowths, hence rendering its detailed...
Mr
T. Amos Nhlapo
(Sefako Makgatho Health Sciences University)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Zn0.5Mn0.5SmxFe2-xO4 (0 ≤ x ≤ 0.05) fine powders with average crystallite size in the range 12-17 nm were synthesized by glycol-thermal reaction. The as synthesized compounds were subjected to the annealing process of 1100 C, after which the crystallite size increased to about 60 nm. XRD analysis confirmed a single phase cubic spinel structure in all the compounds investigated. TEM images...
Mr
Pannan Kyesmen
(University of Pretoria)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
In this study, we investigated the impact of ramping rate on the structural and optical properties of hematite films prepared by spin coating. Four samples of hematite films were deposited on FTO substrate at 500°C sintering temperature and 1, 4, 8 and 12°C ramping rates respectively. XRD studies of the films revealed prominent peaks for hematite at (104) and (110) with weak reflections at...
Dr
Didier Mbela Kalengay
(University of Namibia)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
In the present study, we have synthesized Sn0.2Fe0.9Cr0.9O3 nano oxides. Single phase corundum -like structure and nanophase structure of the as-synthesized sample were confirmed by X-ray diffraction (XRD) and by transmission electron microscope (TEM). The results show that the produced powders have grain size of approximately 32 nm. Using the result of the UV-Vis spectrometer, we were able to...
Mr
Hamza Mohammed
(The National Institute for Theoretical Physics, School of Physics and Mandelstam Institute for Theoretical Physics, University of the Witwatersrand, Johannesburg, Wits 2050, South Africa)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Platinum dichalcogenides PtSe2 and PtTe2 crystallise in layered structures. We present density functional theory calculations of the structural, stability and electronic properties of the layered bulk, monolayer and bilayer platinum dichalcogenides PtSe2 and PtTe2 compounds in the CdI2 structure, space group $P\bar{3}m1$. Our calculations...
Mr
malesela walter Makgoba
(University of Limpopo)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
The classical molecular dynamics was used to study various forms of graphene oxide possible formations focusing mainly on the structural stability. The structures were modelled at 300 K through the NVT Evans ensemble. Variations of the total energy against the a-axis was explored in which the equilibrium properties were computed. Pair distribution functions as well as structure factors were...
Abdu Barde
(The National Institute for Theoretical Physics, School of Physics and Mandelstam Institute for Theoretical Physics, University of the Witwatersrand, Johannesburg, Wits 2050, South Africa)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Structural, electronic and optical properties of rare-earth copper chalcogenides LaCuX2 (X = S, Se) were investigated with density fuctional theory (DFT). The calculated structural properties agree resonably well with previous results and experimental data. Elastic constants satisfy the stability conditions for monoclinic structures, wich confirms mechanical stability for the...
Dr
Thulani Jili
(University of Zululand)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
We utilized positron annihilation technique in obtaining Doppler broadening spectra in the temperature range 300 – 900 K. Theoretical approach utilizes the Local Density and the Generalized Gradient Approximations that calculate the Doppler broadening spectra in the temperature range. We found that the positrons annihilating with barium valence electrons, especially the 5p and the 6s...
Mr
Joshua Khoele
(iThemba LABS)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
The influence of erbium (Er+) ion irradiation on the structural modification in indium gallium nitride (InGaN) thin films is studied by a combination of Rutherford backscattering spectrometry and channeling (RBS/C) and Raman spectroscopy. Epitaxial InGaN thin films, with thicknesses of 20 nm, grown on sapphire substrates with gallium nitride (GaN) buffer layers, were irradiated with 170 keV...
Mr
Gilbert Samukonga
(Copperbelt University)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
A number of potentially ultra-hard materials were examined using ab-initio methods. Compound phases of varying lattice stoichiometry in the B-C-N-O quaternary system, in the forms, C8-xBx (x = 1, 2, 3, 4), C7-xBNx (x = 1, 2, 3) and C6-xBNOx (x = 1, 2) were proposed as possible super-hard materials with useful applications. Cell structures and elastic properties were studied, systematic trends...
Dr
Cebo Ndlangamandla
(University of Zululand)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Since the discovery of Iron Oxide, several phases of it have been realized. A thermodynamic stable phase of Iron Oxide from a natural occurring water photo oxidation. This work seeks to enhance the band gap and the conduction edge to the required values in order to attain this phase akaganiete (β-FeOOH) is hematite (α-Fe2O3) and it has attracted much attention because of its great advantages,...
83.
Sythesis and Characterization of NiO thin films and nano-structures for gas sensing applications
Mr
Prince Mkwae
(University of Zululand)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
NiO thin films were deposited at different temperatures (RT,100, 200, 350 and 450 degree Celsius) using a direct current (DC) sputtering system and then nickel oxide nano-structures were synthesized on the deposited NiO film using hydrothermal method. The thin films and nano-structures were subjected to various characterization techniques (X-ray diffraction, Rutherford Back scattering...
Mr
Ross Dix-Peek
(NMMU)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Electroluminescence imaging has been utilised in qualitative characterisation of photovoltaics devices since 2005. Since then, quantitative techniques have been developed. However, the temperature dependence of the emission-voltage response (equation 1) of photovoltaic devices has not been studied in-depth. This work investigates the temperature dependence of the proportionality constant and...
Mr
ABONGILE BELE
(Sefako Makgatho Health Sciences University)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Semiconductor material are characterized with the Schottky barrier diodes (SBDs) as a basic structure. The study was conducted in order to check the effect of iron particles on the electrical properties of Gallium antimonide (GaSb) semiconductor material. Gallium Antimonide (GaSb) was implanted with iron particles at various ion fluences ranging from 1.2 × 10^15 to 1.2 × 10^17 cm^-2 while...
Dr
Fhulufhelo Nemangwele
(University of Venda)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Measurement of microwave properties of high Tc superconductors (HTSC) has fundamental physical and technological relevance. HTSC are granular in nature and contain many Josephson junctions or weak links. We have measured the microwave response of NI-YBCO powder, using low field dependent microwave absorption (LFDMA) technique. The existence of peaks in LFDMA is well-established while...
Prof.
Setumo Victor Motloung
(SMU)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
BaAl2O4:x% Cu2+ (0 ≤ x ≤ 1) nano-powders were successfully synthesized via citrate sol-gel method. The X-ray diffraction (XRD) spectrum revealed that the prepared BaAl2O4:x% Cu2+ samples consists of the hexagonal BaAl2O4. The estimated average crystallite sizes from the XRD and transmission electron microscopy (TEM) were found to be in the order of 20 nm. The energy dispersive X-ray...
Ms
Tshiwela caroline Ramashitja
(Department of physics, University of South Africa , Private Bag X6, Florida 1710, South Africa)
11/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Poster Presentation
Non resonant microwave absorption technique at liquid helium temperature has been used to study the microwave power effect and anisotropic effect on the hysteresis loops of superconducting BaK122 single crystals measured at 9.4GHz below Tc (32 K). We have found a striking microwave power effect on the hysteresis loops that were measured and a strong anisotropy was found for the two distinct...
Dr
Amos Akande
(Dept. of Physics, University of Limpopo, DST/CSIR National Centre for Nano-Structured Materials, P O Box 395, Pretoria 0001, South Africa)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
To build an efficient and reliable nano-gas sensing device, critical study and analysis of the sensing material in terms of the parameters such as sensitivity and selectivity is a key requirement. In this study, experimental sensing performance of dopantless V2O5 to NH3 gas and its density functional facile properties are presented. The V2O5 sample material was synthesized from NH3VO4 via CVD...
Ms
Susan Ndou
(University Of Limpopo)
11/07/2019, 15:00
Track G - Theoretical and Computational Physics
Poster Presentation
Most of the world’s supply of platinum and palladium and associated elements comes from mines within four major layered igneous intrusions: the Bushveld Complex in South Africa, the Stillwater Complex in the USA, the Great Dyke in Zimbabwe and the Noril’sk-Talnakh Complexes in Russia. The predominant PGM in the mined area of the Platreef and Merenskyite of the Bush complex in South Africa are...
