Conveners
Physics of Condensed Matter and Materials
- Raesibe Sylvia Ledwaba (University of Limpopo)
Physics of Condensed Matter and Materials
- Thulani Jili (University of Zululand)
Physics of Condensed Matter and Materials
- Thabo Letsoalo (University of Limpopo)
Physics of Condensed Matter and Materials
- Rosinah Modiba (CSIR)
Physics of Condensed Matter and Materials
- Emanuela Carleschi (Department of Physics, University of Johannesburg)
Physics of Condensed Matter and Materials
- Balakrishna Avula (University of The Free State)
Physics of Condensed Matter and Materials
- Setumo Victor Motloung (SMU)
Physics of Condensed Matter and Materials
- Rudolph Erasmus (University of the Witwatersrand)
Physics of Condensed Matter and Materials
- Abhishek Pandey (School of Physics, University of the Witwatersrand)
Physics of Condensed Matter and Materials
- There are no conveners in this block
Ms
Ramogohlo Diale
(University of Limpopo)
09/07/2019, 10:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
The TiPd alloy exhibits thermoelastic martensitic phase transformation above 823 K and has potential for high-temperature shape memory applications. Previous studies showed that this alloy is unstable displaying a negative C′ at room temperature. In order to improve their properties, the effects of partial substitution of Pd with Co are being investigated. The structural, thermodynamic and...
Mr
Brian Ramogayana
(UL)
09/07/2019, 10:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Lithium manganese oxide (LiMn2O4) spinel attracted the most attention as a potential cathode material for lithium-ion batteries because of its three-dimensional crystal structure that allows a smooth diffusion of Li+ in and out of the material. However, its application as a cathode material is limited by irreversible capacity fading due to manganese...
Ms
Mogahabo Morukuladi
(UL)
09/07/2019, 10:40
Track A - Physics of Condensed Matter and Materials
Oral Presentation
First-principles calculations were carried out on the structural, thermodynamic, electronic and mechanical properties of MCO3 precursor materials at 0 K to investigate their possible application as cathodes in Li-ion batteries. Li-ion batteries are the most crucial power sources for portable electronic devices. However, their performance greatly depends on the cathode materials,...
Mr
Mphamela Enos Baloyi
(UL)
09/07/2019, 11:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
The ab initio density functional theory approach was employed to study the effect of Hf addition to the TiPt binary shape memory alloys (SMAs). SMAs have the ability to retain its original shapes after deformation and have been widely used in the fields of engineering and medicine due to their shape memory effect (SME) and super-plasticity which are displayed in martensitic transformations....
Mr
matome Matome
(University of South Africa)
09/07/2019, 11:40
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Polymer based electronics is an emerging technology that is focused on developing electronic devices using semiconducting polymers that can potentially replace silicon based electronics. Polymer based electronics materials are relatively cheaper to synthesize and are mechanically flexible compared to silicon. Metal-polymer nanocomposites, for example, have distinctive electrical, optical and...
Mr
Tsholo Talane
(TUT)
09/07/2019, 12:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
New enhanced novel phosphors with high efficiency, persistent luminescence lifetime and intensity are needed for the development of various nano-technologically advancing industries. In this respect, this study will discuss the basic information on trivalent rare earth ions photoluminescence emission (down and up conversion emissions) in the UV/Vis/NIR regime and optical band-gap tuning based...
Mr
Sizwe Masuku
(University of Zululand)
09/07/2019, 12:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
In the current work the TMxCo1-xFe2O4 (TM = Zn or Cd) nanosized compounds with average particle size of about 9 nm were synthesized and investigated by Mössbauer and magnetization measurements. The concentrations of Zn2+ or Cd2+ ions and crystallite size have significant effects on the magnetic properties. The 57Fe Mössbauer spectral studies show ordered magnetic spin state for x < 0.5 and...
Mr
Phuti Balty Tjale
(School of Physics, University of the Witwatersrand, Private Bag 3, 2050 WITS)
09/07/2019, 12:40
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Intensive interest on Ge-Sb-Te (GST) based alloys is driven by their outstanding electrical and optical properties which makes them excellent candidates for universal nonvolatile memory applications, also known as the phase change random access memory (PCRAM). The operating principle of the PCM is based on the rapid iterative reversible transition between two structural phases after a...
Mr
Percy Ngobeni
(UL)
10/07/2019, 10:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Metal-air batteries are viewed as the next generation energy storage devices due to their high energy density and environmental friendliness. However, they suffer from production of unstable discharge products which leads to capacity fading of the battery. Several catalysts have been used to improve Oxygen Reduction Reaction (ORR) and Oxygen Evolution Reaction (OER) which will yield stable...
Mr
Khumbulani Tibane
(UL)
10/07/2019, 10:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Developing new battery technologies to sustain the ever growing demand of energy storage constitutes one of the greatest scientific and societal challenges of the century. Lithium-ion batteries (LIBs) are at the center of energy revolution, they power millions of portable electronics and electric vehicles. Li ion’s success is in part due to the remarkable mobility of Li+ in many...
Mr
Nkgaphe Tsebesebe
(University of Limpopo)
10/07/2019, 10:40
Track A - Physics of Condensed Matter and Materials
Li-excess Mn-based materials are potential candidates for the next generation of cathode materials owing to their high discharge capacity (>200 mAh/g). This drives the interest for the intercalation/deintercalation processes using host electrodes with dimensions at the nanoscale, as this is sufficiently quick to deliver the power required from Li-ion batteries. The favorable material Li2MnO3 is...
Mr
Thokozani Mpanza
(University of Zululand)
10/07/2019, 11:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Tungsten oxide (WO3) thin films for gas sensing have been successfully deposited using reactive direct current (DC) magnetron sputtering at different deposition temperatures (300 ºC, 400 ºC and 500 ºC). The structural, morphological properties, thickness and composition have been investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and Rutherford backscattering...
Mr
DONALD HLUNGWANI
(UL)
10/07/2019, 11:40
Track A - Physics of Condensed Matter and Materials
The layered-spinel composites are amongst the utmost propitious cathode materials with potential to advance lithium ion batteries, to date. They demonstrate tremendous improvement on structural stability, cycling performance and higher specific capacity, > 250 mAh/g. Recent studies have focused mainly on enhancing the specific capacity of these layered-spinel composites. However, there is...
Mr
Clinton Dlamini
(SMU)
10/07/2019, 12:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
In this study, manganese doped magnesium aluminate nanopowders (MgAl2O4:0.1% Mn2+) were prepared by citrate sol-gel. The effect of annealing period/time (AP) at a fixed annealing temperature (800 oC) and dopant concentration (0.1% Mn2+) on the structure, particle morphology and photoluminescence properties of the nanopowders were investigated. X-ray powder diffraction (XRD) results showed that...
Ms
Beauty Shibiri
(University of Limpopo)
10/07/2019, 12:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Optimising the performance potential in terms of voltage and capacity of Li-ion batteries requires understanding of both electrochemical and mechanical properties of a material. Molecular dynamics (MD) methods are capable of informing the time dependent properties such as amorphisation and recrystallisation (A+R) which can provide understanding of microstructural evolution. As such, MD...
Ms
Andile Mazibuko
(University of Limpopo)
10/07/2019, 12:40
Track A - Physics of Condensed Matter and Materials
Oral Presentation
In this study we explore an alternative way to maximize Ti production by using LiCl salt. We employed the DL_POLY code to understand the interaction of LiCl at various temperatures in order to achieve Ti that has good properties at high temperatures. The LiCl structure was validated using available experimental and ab initio structural data such as elastic constants. The molecular dynamic...
Mr
DAVID TSHWANE
(UNIVERSITY OF LIMPOPO/CSIR)
10/07/2019, 14:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Hydrofluoric acid is a candidate that can be used for etching metal oxide surface due to its strong corrosive qualities, However, etching phenomenon is not well understood at the atomistic level. Investigation of HF interaction with TiO2 rutile lower surface index is important for enhancing the etching mechanism. Adsorption geometries and energies of HF on TiO2 rutile lower surface index have...
Mr
Olakunle Oluwaleye
(University of South Africa)
10/07/2019, 14:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Modification of transparent conducting oxide (TCO) thin films using transition metal ion beams has received much research focus due to the possibility of developing diluted magnetic semiconductors (DMSs). DMS materials are potential candidates for application in spin based magnetoelectronic and optoelectronic nanodevices [1]. This work reports on the effects of Co+ ion implantation on band...
Ms
zamaswazi portia Tshabalala
(DST/CSIR National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, Pretoria, 0001, South Africa)
10/07/2019, 14:40
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Over the years, a lot of researchers have invested their attention and time in investigating and improving chemical gas sensors as they have extensive applications in variety of fields such as air quality and environmental monitoring, mining, oil and automobile industry, food safety, medical diagnosis and monitoring. There is a high demand for accurate, fast, stable and portable devices that...
Mr
Mojeed Adedoyin Agoro
(University of Fort Hare)
10/07/2019, 15:00
Track A - Physics of Condensed Matter and Materials
Solar cell sensitizer absorbers of inorganic quantum dots (QDs) has shown great potential in photovoltaic application. The use of quantum dots as an improved absorber layer in photochemical solar cells has attained a noble ground, where essential electron and hole generation occurs. Herein, we demonstrate the synthesis and characterization of metal sulphides nanoparticles, prepared from...
Ms
Redrisse Djoumessi Fobasso
(University of Johannesburg)
10/07/2019, 15:40
Track A - Physics of Condensed Matter and Materials
Oral Presentation
R-T-X (R= rare-earth, T= Transition element and X = p-block element) ternary intermetallic compounds have drawn considerable attention for their diversity of structural and magnetic properties. The rare-earth family of R3T4X12 type is of particular interest among intermetallics because the structure contains layers as well as triangular and distorted Kagomé lattice features. In this work, we...
Mr
Hlanganani Nyembe
(Centre for HRTEM, Nelson Mandela University)
10/07/2019, 16:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
A remaining life assessment and microstructural ageing study was performed on a high-pressure turbine rotor belonging to a 200 MW coal-fired power plant unit. The rotor consists of 1CrMoV steel that operated for more than 100 kh, under a pressure of 10.55 MPa and a temperature of 520 °C. Core samples were removed from the high stressed geometry areas of the rotor by a plug sampling and hydro –...
Mr
Nzundu Tony Nsio
(University of Namibia)
10/07/2019, 16:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
We have investigated the properties of Sn0.2FexCr1.8−xO3 synthesized directly from high purity metal by reflux and by pressure reactor process. These alloys series were synthesized at low reaction temperature of about 100 ℃ using hydrothermal methods. XRD analysis for the samples synthesized in a stirred pressure reactor and in a reflux indicate the basic corundum structure for the...
Mrs
FOBASSO M F C
(UNIVERSITY OF DSCHANG)
10/07/2019, 16:40
Track A - Physics of Condensed Matter and Materials
We investigate the stability of excitonic states, which are pairs of fermionic particles, by using Feynman Path Integrals methods and Grassman algebra that best describes fermions. The system is decoupled using Berezin integral. Working in the reciprocal space allow us to write the total action functional express in terms of interacting and non-interacting Green functions. This action...
Mr
GAYI NYONGOMBE EKAMBO
(UNISA)
11/07/2019, 10:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
The increasing environmental challenges such as the rise of global warming and the depletion of fossil fuels triggered the in studying various clean energy technologies. Such, including fuel cells, solar, wind, geothermal and tidal power. The energy produced by these systems requires an energy storage device, for the energy to be used over a long period. Modern energy storage devices include...
Dr
Abhishek Pandey
(School of Physics, University of the Witwatersrand)
11/07/2019, 10:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Search for new high-Tc superconductors (SCs) got a boost in 2008 after the discovery of superconductivity in tetragonal iron-based compounds 1111-type LaFeAsO1-xFx and 122-type AFe2As2 (A = Ba, Sr and Ca). Efforts begun to discover new SCs or their prospective parent compounds and soon a few other SC families were discovered. Two common ingredients of the parent compounds of the iron-based SC...
Prof.
Makaiko Chithambo
(Rhodes University)
11/07/2019, 10:40
Track A - Physics of Condensed Matter and Materials
If the emission of luminescence is affected by thermal assistance, and if the total probability of emission 1/τ is modulated by a Boltzmann factor exp(- Εα/ κΤ) where Εα is the activation energy of thermal assistance, the overall probability of optically stimulated luminescence emission can be expressed for n electron traps as:
1/τ = [1/τrαd + ν...
Dr
Emanuela Carleschi
(Department of Physics, University of Johannesburg)
11/07/2019, 11:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Investigating the electronic structure of solid materials is a very powerful tool to get insights into the oxidation state, composition, chemical bonding, binding energies and correlation effects, as well as the low-energy electronic band structure and the Fermi surface of these materials. Such investigations are carried out experimentally by exploiting a technique named photoemission...
Dr
Rudolph Erasmus
(University of the Witwatersrand)
11/07/2019, 12:00
Track A - Physics of Condensed Matter and Materials
Mr
Akin Olaleru
(University of venda, South Africa)
12/07/2019, 11:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
Hybrid perovskite solar cells aroused great interest in the field of photovoltaics lately due to easy fabrication process, tunable band gap within the visible region, high absorption coefficients and carrier mobility (164cm2v-1s-1). In this work, we studied the effect of two processes on the structural, thermal and optical properties of the powder perovskite materials for the application in...
Dr
Raesibe Sylvia Ledwaba
(University of Limpopo)
12/07/2019, 11:40
Track A - Physics of Condensed Matter and Materials
Oral Presentation
The charge compensation of both transition metal (Mn) and oxygen in the redox reactions has driven possession of high specific capacity in Li-rich layered oxide. Although these Li-rich electrodes could achieve higher reversible capacity in energy storage systems due to the oxygen anion participating in electrochemical reaction, that is not the case because of the irreversible oxygen reaction...
Mrs
Motlalepula Rebecca Mhlongo
(Sefako Makgatho Health Sciences University)
12/07/2019, 12:00
Track A - Physics of Condensed Matter and Materials
Oral Presentation
ZnAl2O4 powders were prepared by chemical bath deposition (CBD) method by varying ammonium hydroxide solution (AHS). The volume of the AHS was varied from 5 – 100 mL in order to determine the optimum volume that is needed for preparation of ZnAl2O4 powders. The effect of AHS volume on the structure, morphology, and optical properties of ZnAl2O4 powders was investigated. The X-ray diffraction...
Dr
Balakrishna Avula
(University of Johannesburg)
12/07/2019, 12:20
Track A - Physics of Condensed Matter and Materials
Oral Presentation
A series of novel white light emitting CaMoO4:Dy3+ (1.0 mol %) phosphors substituted with different anionic groups (BO3-3, PO4-3 and SO4-2) were prepared using a high temperature solid state reaction method. The effects of anionic substitution on the crystalline structure and photoluminescence (PL) properties of the CaMoO4:Dy3+, CaMoO4-BO3:Dy3+, CaMoO4-PO4:Dy3+and CaMoO4-SO4:Dy3+ phosphors...
Mr
Samkelo Sinoyolo Ngongo
(Nelson Mandela University)
12/07/2019, 12:40
Track A - Physics of Condensed Matter and Materials
Oral Presentation
There is a need for additional energy generation capacity in South Africa, and the government has identified nuclear power as part of the future energy mix. For safety, economics and reliability of nuclear energy generation the issues that affects the cladding material (i.e. ZIRLO) such as waterside corrosion, which limits the life time of the fuel tubes, must be resolved. Zirconium alloy is...
