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Theses and Dissertations (Physics): Recent submissions
Now showing items 41-60 of 194
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(University of Pretoria, 2021)We investigate the spectral problem of spin chain models in a family of 4D N =2 superconformal quiver gauge theories, constructed as an orbifold of N = 4 super Yang-Mills theory, in the planar limit. We consider two scalar ...
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(University of Pretoria, 2021)We begin with a brief overview of measure theory and the theory of optimal transport. We then proceed to study a special class of quantum states represented by quantum Markov semi-groups (QMS) on a finite dimensional ...
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(University of Pretoria, 2022)In April 2019, the Event Horizon Telescope (EHT) Collaboration released the first image of a black hole (BH) shadow. Theoretical models that aim to describe the environments of BHs are complex and highly-dimensional numerical ...
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(University of Pretoria, 2014-03)This work studied the manganese oxide based nanostructures for enhanced performance (power and energy densities) as electrode materials in lithium ion batteries (LIBs) and electrochemical capacitors (ECs). The high energy ...
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(University of Pretoria, 2020)The Inverse Temperature Crystallization (ITC) and seed-induced method were used to grow high-quality cubic samples within hours using a 1M solution of methylammonium lead bromide (MAPbBr3) samples. The current-voltage (I-V) ...
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(University of Pretoria, 2021)Photosynthesis is the direct source of energy for life on Earth. This process begins with the absorption of photons by light harvesting complexes, such as light har- vesting complex II (LHCII) in plants and phycobilisome ...
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(University of Pretoria, 2021-04)SUMMARY Owing to their superior properties, TiN and TiC have been proposed as potential fuel cladding materials for the proposed generation IV (Gen IV) nuclear energy systems. In this application they will be exposed ...
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(University of Pretoria, 2020)Due to the increasing demands for energy-storage systems, supercapacitors (SCs) have received significant attention due to their properties/electrochemical performance. Many research papers and technical reports on the ...
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Synthesis and characterization of nanostructured hematite for photoelectrochemical water splitting (University of Pretoria, 2021)This study aims to synthesize nanostructured hematite films using spray pyrolysis at different deposition temperatures. L-arginine was used to transform the irregular shaped nanoparticles to uniform nanospheres by chemical ...
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(University of Pretoria, 2021)Stacking is a statistical approach to measure the average properties for known objects that are too faint to be detected individually at the target wavelength. This approach has been extensively used for studies of high ...
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(University of Pretoria, 2020-12)Neutral hydrogen (HI) is a key ingredient in galaxy formation and an excellent tracer of galaxy evolution and the environmental drivers thereof. HI volume density varies significantly with environment, where denser ...
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Effect of heat treatment on the migration behaviour of selenium implanted into polycrystalline SiC (University of Pretoria, 2021)The success of a very high temperature gas cooled reactors (VHTGRs) like a pebble bed modular reactor (PBMR) depends greatly on the retainment of fission products. In PBMR the retainment is achieved by coating the fuel ...
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(University of Pretoria, 2020-10)In this thesis, we have developed a reproducible, safe, and scalable sequential thermal vapour deposition (STVD) method for the growth of quality 3D halide perovskite (HaP) thin films. High-quality methylammonium lead ...
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(University of Pretoria, 2021)In this dissertation, α-Fe2O3 thin film deposition techniques were first evaluated to understand their effects on the structural, optical and photoelectrochemical (PEC) properties of the films. α-Fe2O3 films were deposited ...
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(University of Pretoria, 2020-12-06)In the framework of the quasi-static approximation (QSA), some theoretical studies were conducted within the local response approximation (LRA). In these studies, certain plasmonic and plexcitonic systems were proposed, ...
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(University of Pretoria, 2020-11-30)Vanadium disulphide/graphene foam composite samples with varying physical and electrochemical properties were synthesised through varying the mass of graphene in the composite. The optimized VS2/GF-100 mg exhibited superior ...
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(University of Pretoria, 2019)We study noncommutative geometry from a metric point of view by constructing examples of spectral triples and explicitly calculating Connes's spectral distance between certain associated pure states. After considering ...
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(University of Pretoria, 2019)The study of defects in semiconductors has been on-going for over 50 years. During this time, researchers have been studying the origins and identity of process induced defects, a task which has proved to be very demanding. ...
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(University of Pretoria, 2020)In this study, a cylinder expansion test was performed using a square prism OFHC copper with a cylindrical extrusion filled with Comp B explosive charge. A Valyn VISAR was used as a measuring tool to record the expansion ...
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(University of Pretoria, 2020)In this study, coatings of hydroxyapatite (HAp) prepared by thermal spraying technique are investigated for biological response. Spraying was done on two geometrically different Ti-6Al-4V alloy substrates under atmospheric ...
Now showing items 41-60 of 194