Browsing Philosophiae Doctor - PhD (Chemistry) by Author "Iwuoha, Emmanuel"
Now showing items 1-20 of 34
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Aluminium and gold functionalized graphene quantum dots as electron acceptors for inverted Schottky junction type rainbow solar cells
Mathumba, Penny (University of Western Cape, 2020)The main aim of this study was to prepare band gap-engineered graphene quantum dot (GQD) structures which match the different energies of the visible region in the solar spectrum. These band gap-engineered graphene quantum ... -
Chemical isolation and electro-chemical characterization of antidiabetic compounds from selected South African lamiaceae plant species
Etsassala, Ninon Geornest Eudes Ronauld (University of the Western Cape, 2020)Diabetes mellitus (DM), being one of the most common metabolic disorders with an elevated morbidity and mortality rate around the world. It is characterised by deficiency in insulin secretion or degradation of secreted ... -
Chromium and Titanium based Stannum Nanocomposites materials as electron acceptors for next generation bulk Heterojunction photovoltaic cells
Raleie, Naledi (University of the Western Cape, 2018)Renewable energy has become the centrepiece of research in resolving the energy crisis. One of the forms of renewable energy is solar energy. This form of energy is costly to develop. Organic molecules are promising materials ... -
Composite poly(dimethoxyaniline) electrochemical nanobiosensor for glufosinate and glyphosate herbicides
Songa, Everlyne Apiyo (University of the Western Cape, 2008)In this thesis, I present a simple, sensitive and low cost electrochemical nanobiosensor for quantitative determination of the herbicides glufosinate, glyphosate and its metabolite aminomethylphosphonic acid (AMPA). Firstly, ... -
Dendritic poly(3-hexylthiophene) star copolymer systems for next generation bulk heterojunction organic photovoltaic cells
Yonkeu, Anne Lutgarde Djoumessi (University of the Western Cape, 2018)The continuous increase in energy consumption and decrease in fossil fuels reserves are a primary concern worldwide; especially for South Africa. Therefore, there is an urgent need for alternative energy resources that ... -
The design of ultrasensitive immunosensors based on a new multi-signal amplification gold nanoparticles-dotted 4-nitrophenylazo functionalised graphene sensing platform for the determination of deoxynivalenol
Sunday, Christopher Edozie (University of Western Cape, 2014)A highly dispersive gold nanoparticle-dotted 4-nitrophenylazo functionalised graphene nanocomposite (AuNp/G/PhNO2) was successfully synthesised and applied in enhancing sensing platform signals. Three label-free ... -
The development of graphene oxide sheet- and polyanilino-immunosensor systems for lipoarabinomannan (LAM) tuberculosis biomarker
Wilson, Lindsay Robin (University of the Western Cape, 2017)Tuberculosis (TB) is an infectious disease with adverse effect on a global scale. The disease is one of the major causes of death in sub-Saharan Africa. Nearly 70% of TB-infected persons are co-infected by the human ... -
Development of high performance composite lithium ion battery cathode systems with carbon nanotubes functionalised with bimetallic inorganic nanocrystal alloys
Ikpo, Chinwe Oluchi (University of Western Cape, 2011)Lithium ion cathode systems based on composites of lithium iron phosphate (LiFePO₄), iron-cobalt-derivatised carbon nanotubes (FeCo-CNT) and polyaniline (PA) nanomaterials were developed. The FeCo-functionalised CNTs were ... -
Development of platino-iridium/ruthenium telluride nanoalloy electrode systems for possible application in ammonia fuel cell
Mayedwa, Noluthando (University of the Western Cape, 2015)South Africa is undergoing a serious consideration of hydrogen economy in an effort to develop safe clean and reliable alternative energy sources for fossil fuels. Ammonia is one of the promising candidates due to its low ... -
Development of polyaniline nanotube electrocatalysts and sesor devices for phenolic-pollutants
Klink, Michael John (University of the Western Cape, 2007)As a source of life, water is one of the most precious commodities for all living organisms. Water resources are reported to be declining in numbers or the amount of water present and the existing onses are being polluted ... -
Electrochemical and optical modulation of selenide and telluride ternary alloy quantum dots genosensors
Ndangili, Peter Munyao (University of the Western Cape, 2012)Electroanalytical and optical properties of nanoscale materials are very important for biosensing applications as well as for understanding the unique one-dimensional carrier transport mechanism. One-dimensional semiconductor ... -
Electrochemical cytochrome P450 enzymatic biosensors for the determination of the reactivity of TB drugs
Rassie, Candice (University of Western Cape, 2020)Tuberculosis (TB) remains a global epidemic despite the fact that treatment has been available since the 1950’s. This disease is highly contagious and spreads via transmission of the Mycobacterium Tuberculosis (MTB) tubercle ... -
Electrochemical ochratoxin a immunosensors based on polyaniline nanocomposites templated with amine- and sulphate-functionalised polystyrene latex beads
Muchindu, Munkombwe (University of the Western Cape, 2010)Polyaniline nanocomposites doped with poly(vinylsulphonate) (PV-SO3) and nanostructured polystyrene (PSNP) latex beads functionalized with amine (PSNP-NH2) and sulphate ((PSNP-OSO3) were prepared and characterised for use ... -
Frequency and voltage-modulated electrochemical aflatoxin B1 immunosensor systems prepared on electroactive organic polymer platforms
Owino, Joseph Hasael Odero (University of the Western Cape, 2008)In the presented work, immunosensors for detection of Aflatoxin B1 based on different immobilization platforms were studied. Synthesis of an electroactive hydrogel was also carried out. Aflatoxins are a group of mycotoxins ... -
Frequency and voltage-modulated electrochemical aflatoxin b1immunosensor systems prepared on electroactive organic polymer platforms
Odero, Owino Joseph Hasael (2008)In the presented work, immunosensors for detection of Aflatoxin B1 based on different immobilization platforms were studied. Synthesis of an electroactive hydrogel was also carried out. Aflatoxins are a group of mycotoxins ... -
Graphenated polyaniline nanocomposite for the determination of polyaromatic hydrocarbons (pahs) in water
Tovide, Oluwakemi Omotunde (2013)The thesis presents a simple, sensitive, low cost and a novel graphenated polyaniline doped tungsten trioxide nanocomposite, as an electrochemical sensor for the detection and quantitative and determination of PAHs, which ... -
Graphol and vanadia-linkedzink-doped lithium manganese silicate nanoarchitectonic platforms for supercapatteries
Ndipingwi, Miranda Mengwi (University of Western cape, 2020)Energy storage technologies are rapidly being developed due to the increased awareness of global warming and growing reliance of society on renewable energy sources. Among various electrochemical energy storage technologies, ... -
Hydrogel encapsulated biosensors for the detection of biologically significant vanadium and selenium
Muya, Francis Ntumba (University of the Western Cape, 2017)Vanadium and selenium salts are toxic in large amounts, but trace amounts are necessary for cellular function in many organisms. Exposure to high level of selenium has been linked to delays in early childhood development ... -
Immunosensors developed on clathrate platform compounds
Nohako, Kanyisa (University of the Western Cape, 2013)Organic noncyclic compounds were used in the development of immunosensor for rapid fish species detection. Flourene derivatives show unique chemical and physical properties because they contain a rigid planar biphenyl unit, ... -
Investigation of anti-cancer potential of Pleiocarpa pycnantha leaves
Omoyeni, Olubunmi Adenike (University of the Western Cape, 2013)The Apocynaceae family is well known for its potential anticancer activity. Pleiocarpamine isolated from the Apocynaceae family and a constituent of Pleiocarpa pycnantha has been reported for anti-cancer activity. Prompted ...