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Now showing items 21-30 of 237
The curious case of offset bars : markers for a baby galaxy disk or signposts of an interaction with dark matter sub halos?
(University of the Western Cape, 2016)
We have used the Spitzer Survey of Stellar Structure in Galaxies (S⁴G) as a representative sample of the local universe (total of 2352 galaxies in S⁴G) to make a catalog of offset disk barred galaxies. Using the combined ...
Far-infrared-radio relations in clusters and groups at intermediate redshift
(University of the Western Cape, 2014)
In this thesis, we present a multi-wavelength analysis of star-forming galaxies to shed new light on the evolution of the far-IR-radio relations in intermediate redshift (0.3 < z < 0.6) galaxy clusters and galaxy groups. ...
Growth and characterization of FeSi nanowires by chemical vapor deposition for gas sensing applications
(University of the Western Cape, 2014)
FeSi nanowires were synthesized via a chemical vapor deposition method. Anhydrous FeCl3 powder in this case served as the Fe source and was evaporated at a temperature of 1100oC to interact with silicon substrates which ...
Effect of the additional electron acceptor in hybrid ZnO: P3HT:PCBM spin-coated films for photovoltaic application
(University of the Western Cape, 2015)
In a quest for low operational and maintenance cost solar cell devices, organic photovoltaics remain a potential source of energy worthy to be explored. In order to generate cost- effective electricity from solar energy, ...
Selection and optimization of the seeding procedure prior to the synthesis of Pd-based membranes
(University of the Western Cape, 2014)
Pd based membranes are known for their incredible selectivity towards H2. In order for Pd membranes to display high H2 selectivity, a defect free layer of Pd needs to be deposited onto a support. Although various fabrication ...
Deposition of silicon nanostructures by thermal chemical vapour deposition
(University of the Western Cape, 2015)
In this thesis we report on the deposition of silicon nanostructures using a 3-zone thermal chemical vapour deposition process at atmospheric pressure. Nickel and gold thin films, deposited by DC sputtering on crystalline ...
An Investigation of magnetic storm effects on total electron content over South Africa for selected periods in solar cycles 23 and 24
(University of the Western Cape, 2012)
The development of regional ionospheric Total Electron Content (TEC) models has contributed to understanding the behavior of ionospheric parameters and the coupling of the ionosphere to space weather activities on both ...
Nonlinear low frequency wave phenomena in space plasmas
(University of the Western Cape, 2013)
In this thesis, using multispecies fluid plasma models, nonlinear electrostatic solitary wave fluctuations will be investigated in magnetized plasmas. The different models used for the investigation will be guided by the ...
Simulation of silicon and diamond detector systems by GEANT4 simulation techniques
(University of the Western Cape, 2014)
There is a constant need for improvement in nuclear particle detection methods. Silicon surface barrier detectors have proved very valuable during the last decades. Diamond is a viable alternative to silicon as a semiconductor ...
Hydrogenisation of metals
(University of the Western Cape, 2013)
Transition metals are a group of metals which are light in weight and have high hydrogen solubility. Their interaction with hydrogen is exorthermic and this phenomenon makes them “ideal” candidates for various applications ...