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Toward the Optimization of Low-temperature Solution-based Synthesis of ZnO Nanostructures for Device Applications
One-dimensional (1D) nanostructures (NSs) of Zinc Oxide (ZnO) such as nanorods (NRs) have recently attracted considerable research attention due to their potential for the development of optoelectronic devices such as ultraviolet (UV) photodetectors and light-emitting diodes (LEDs). The potential of ZnO NRs in all these applications, however, would require synthesis of high crystal quality ZnO NRs with precise control over the optical and electronic properties. It is known that the optical and electronic properties of ZnO NRs are mostly influenced by the presence of native (intrinsic) and impurities (extrinsic) defects. Therefore, understanding the nature of these intrinsic and extrinsic def...
Optics of Conducting Polymer Thin Films and Nanostructures
Intrinsically conducting polymers forms a category of doped conjugated polymers that can conduct electricity. Since their discovery in the late 1970s, they have been widely applied in many fields, ranging from optoelectronic devices to biosensors. The most common type of conducting polymers is poly(3,4-ethylenedioxythiophene), or PEDOT. PEDOT has been popularly used as electrodes for solar cells or light-emitting diodes, as channels for organic electrochemical transistors, and as p-type legs for organic thermoelectric generators. Although many studies have been dedicated to PEDOT-based materials, there has been a lack of a unified model to describe their optical properties across different s...
Synthesis and Characterization of Some Nanostructured Materials for Visible Light-driven Photo Processes
Nanostructured materials for visible light driven photo-processes such as photodegradation of organic pollutants and photoelectrochemical (PEC) water oxidation for hydrogen production are very attractive because of the positive impact on the environment. Metal oxides-based nanostructures are widely used in these photoprocesses due to their unique properties. But single nanostructured metal oxide material might suffer from low efficiency and instability in aqueous solutions under visible light. These facts make it important to have an efficient and reliable nanocomposite for the photo-processes. The combination of different nanomaterials to form a composite configuration can produce a materia...
Chemically Modified Metal Oxide Nanostructures Electrodes for Sensing and Energy Conversion
The goal of this thesis is the development of scalable, low cost synthesis of metal oxide nanostructures based electrodes and to correlate the chemical modifications with their energy conversion performance. Methods in energy conversion in this thesis have focused on two aspects; a potentiometric chemical sensor was used to determine the analytical concentration of some components of the analyte solution such as dopamine, glucose and glutamate molecules. The second aspect is to fabricate a photo-electrochemical (PEC) cell. The biocompatibility, excellent electro-catalytic activities and fast electron transfer kinetics accompanied with a high surface area to volume ratio; are properties of so...
The Struggle for Iraq
A political scientist's firsthand report on Iraq and his work with his Iraqi staff to promote democracy and fight corruption, from the days of the Coalition Provisional Authority to the present, and his recommendations for American policy-makers based on the lessons learned.
In Search of Paradise
In Search Of Paradise is the saga of courage, resilience and resistance of the daredevils of Gujarat, India. The Kharvas, Bhatias, Lohanas, Patels, Baniyas and people from many other communities sailed in search of paradise when India was battling through severe famine and Cholera epidemic. Surviving the stormy seas, the attacks from the sea pirates, the attacks of the wild animals, the barbaric attacks from the natives of the then uncivilized dark country, through sheer determination, they settled down, trained the natives to the civilized ways and prospered. Sometimes a single Indian opened his shop in the untrodden upcountry, attracted and taught the ways of the world to the native people...
Kenya Gazette
The Kenya Gazette is an official publication of the government of the Republic of Kenya. It contains notices of new legislation, notices required to be published by law or policy as well as other announcements that are published for general public information. It is published every week, usually on Friday, with occasional releases of special or supplementary editions within the week.
