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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 34 for “"AAO"”.
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Templated self-assembly of nanoporous alumina : pore formation and ordering mechanisms, methodologies, and applications
Porous anodic aluminum oxide (AAO), also known as porous alumina, is a self-ordered nanostructured material well-suited for use in electronic, magnetic, optical and biological applications due to its small pore size (4-200nm) and spacing (10-500nm). Under slightly acidic conditions, both oxidation …
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Porous anodic aluminum oxide scaffolds; formation mechanisms and applications
Nanoporous anodic aluminium oxide (AAO) can be created with pores that self-assemble into ordered configurations. Nanostructured metal oxides have proven to be very useful as scaffolds for growth of nanowires and nanotubes with tunable diameters and with tight diameter distributions. For 50 years, …
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Growth of anodic alumina nanopores and titania nanotubes and their applications
Anodic aluminum oxide (AAO) nanopores are excellent templates to fabricate different nanostructures. However, the pores are limited to a hexagonal arrangement with a domain size of a few micrometers. In this dissertation, focused ion beam (FIB) is used to create pre-patterned concaves to guide the …
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Thin-film silicon solar cells : photonic design, process and fundamentals
… The self-assembled anodic aluminum oxide (AAO) technique is introduced to non- lithographically fabricate the grating structure. We adjust the AAO structural parameters by using different anodization voltages, times and electrolytes. Two-step anodization is employed to obtain nearly …
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Turkish as an immigrant and heritage language in the UK: Effects of exposure and age at onset of bilingualism on grammatical and lexical development of the first language
… into the roles of age at onset of bilingualism (AaO) and quantity/quality of L1 contact in this development by bringing together the body of research that was traditionally carried out separately either with early bilinguals/heritage speakers or late bilinguals (attriters). The spoken performance …
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Biological treatment schemes for preventing oxime inhibition of nitrification
… caused by three oximes, acetaldehyde oxime (AAO), aldicarb oxime (ADO), and methyl ethyl ketoxime (MEKO), and to investigate the fate of these oximes under anoxic, denitrifying conditions. Results from aerobic batch studies showed that MEKO was the only oxime which caused significant …
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Design and construction of rigs for studying surface condensation and creating anodized metal oxide surfaces
… Initial fabricated anodized aluminum oxide (AAO) samples have shown to display the characteristic hierarchal nanopore structure of known fabricated AAO in literature. Both the condensation rig and the AMO rig will be used in current and future condensation and superhydrophobic surface …
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Atmospheric circulation and the surface mass balance in a regional climate model of Antarctica
… the positive and negative Antarctic Oscillation (AAO) phases were compared to each other. A positive/negative AAO index means strengthening/weakening of the circumpolar vortex, poleward/northward storm tracks and prevailing/weakening westerly winds. For detailed investigation of global …
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Dynamics of co-behaviour of climate processes over Southern Africa
… Oscillation (ENSO), Antarctic Oscillation (AAO), and many others, play varying roles in regional climate variability across the world. While the role of singular processes have been explored in many studies, the combined influence of multiple large-scale processes has received far less …
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Electrochemical Synthesis of Single Crystal Metal Nanowires
… synthesized into the Anodic Aluminum Oxide (AAO) templates with optimized electrodepositing conditions at room temperature. The nanowires embedded in AAO were released and dispersed on Si/SiO<sub>2</sub> wafer for further observation and analysis in the preliminary studies. The morphology of …
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Commercialization of gallium nitride nanorod arrays on silicon for solid-state lighting
… be fabricated using anodized aluminum oxide's (AAO) ordered arrangement of pores as a template for growth of the nanorod array. AAO is selected for its high porosity and simple controllability of pore size and separation, which can in turn produce high density monocrystalline nanorod arrays with …
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Synthesis, Characterization and Properties of Nanostructured Materials by Template-Directed Method
… method directed by the Anodic Alumina Membrane (AAO) as a template. A so called "polymer-free" method has been investigated to make striped nanowires with superlattice structure. Various methods have been used to characterize these nanomaterials, including SEM, FESEM TEM, STM and Optical …
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Investigating the relationships between wheat-specific rainfall characteristics, large-scale modes of climate variability and wheat yields in the Swartland region, South Africa
… Oscillation [ENSO], Antarctic Oscillation [AAO] and South Atlantic sea surface temperatures [SSTs]) represented by eight climate indices (Nino 3.4 Index, Ocean Nino Index [ONI], Southern Oscillation Index [SOI], AAO index, Southern Annular Mode Index [SAM], South Atlantic Dipole Index …
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Synthesis, structure and magnetic properties of nanowires and films by electrodeposition
In this work, AAO template have been used for the fabrication of metallic nanowires. Single crystalline Ni, Co, and Fe wires have been successfully fabricated and the mechanisms of the single crystalline wire growth have been investigated in detail. It shows that the strain/stress during …
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High Frequency Study of Magnetic Nanostructures
… method of Nickel Nanowire in commercial AAO template in constant current (Galvanostatic) mode, further we tried to estimate the growth rate from theory, from saturation magnetization and direct measurement from SEM image.</p> <p>In part two we focused on using the Vector Network Analyzer …
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National and international crisis management: the influence of Libyan intervention on the duration of the Darfur crisis
This thesis lies in the broader topic of the impact of external intervention on the interstate crises and conflicts and each one's duration. The purpose of this study is to address the gaps and contradictions in the related literature. This study achieves this purpose by investigating the factors …
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Nanowire Zinc Oxide MOSFET Pressure Sensor
… ZnO nanowire growth using anodic alumina oxide (AAO) templates. The pressure sensor has two main components: MOSFET and ZnO nanowires. Silicon Dioxide growth, photolithography, dopant diffusion, and aluminum metallization were used to fabricate a basic MOSFET. In the other hand, a combination of …
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Electrochemical synthesis of functional nanowires
… in the pores of anodic aluminium oxide (AAO) and polycarbonate track-etched (PCTE) templates. With the work focusing on CdSe nanowires, results from the cyclic electrodeposition/stripping method was reported with different deposition conditions(potential range, solution, and scan rate). …
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The Current Use of Soft Tissue Lasers in Orthodontic Practices
… of the American Association of Orthodontists (AAO) to collect this data. Based on the results of this survey, there were no significant associations between orthodontist demographics and soft tissue laser use, practice characteristics and soft tissue laser use, or soft tissue laser use and the …
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Application of Multidisciplinary Design Optimisation to Engine Calibration Optimisation.
… optimisation problem, which are All At Once (AAO), Collaborative Optimisation. An innovative MDO formulation has been developed based on the Collaborative Optimisation application for Diesel engine calibration. Form the MDO implementations, the fuel consumption have been significantly …
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