Global ETD Search
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 9 of 9 for “"ionic diffusion"”.
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Modeling of mechanisms affecting the growth and breakdown of iron sulfide films
Modeling the behavior of ionic materials in electrochemical environments is a topic of great scientific interest for important systems like like fuel cells, batteries, and catalysts and corrosion passive films. However, existing analytical and numerical models of such electrochemical systems like …
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Gallium and titanium diffused optical waveguide devices in sapphire
… an integrated Ti:Sapphire laser using thermal ionic diffusion. Passive and active waveguides were fabricated by thermal diffusion of gallium and titanium ions in sapphire.<br/><br/>Theoretical simulations were established which describe the potential of planar Ti:Sapphire waveguide lasers and …
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Critical review of the South African Concrete Durability Index tests
… processes of permeation, absorption and ionic diffusion. These tests are the oxygen permeability index (OPI), water sorptivity index (WSI), and chloride conductivity index (CCI) tests, respectively. Much work has been done over the past two decades in developing the DI tests to the …
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Study Of Tin-Based Electrodes And Ionic Liquid Electrolytes For Energy Storage Materials
… low volatile electrolytes since they can improve ionic diffusion and transport properties.</p> <p>This dissertation focuses on a systematic approach in developing highly efficient SnO2 and Sn electrodes for rechargeable Li-ion batteries and ionic-liquid electrolytes for rechargeable Li-oxygen …
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Transport of Folic Acid and Related Compounds Across the Small Intestine
… in which absorption occurs by passive, non-ionic diffusion. It is suggested that the uptake of folic acid is enhanced in the jejunum by a "microclimate" at the mucosa! surface having a pH more acidic than the bulk luminal phase.
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Non-lithographic and scalable manufacturing of silicon micro & nanomaterials
… these approaches, a fundamental understanding of ionic diffusion, reaction kinetics, and nucleation dynamics are directly correlated to manufacturing outputs - such as morphology defect density, material removal rate, patterning fidelity and resolution. Three scientific contributions have been …
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Enhancing the mechanical and chemical integrity of Ag/ZnO-based transparent and conductive thin film coatings: an atomistic modelling study
… A new strategy is proposed to limit Ag interdiffusion in ZnO by elemental doping. First principles nudged elastic band calculations indicate that doping ZnO with desired donors (e.g. Al, Sc, Sn, and Bi) increases the Ag migration barrier along [0001] ZnO. A charge density analysis shows that …
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Modeling of Bio-inspired Jellyfish Vehicle for Energy Efficient Propulsion
… combined with the practical aspects related to ionic diffusion driven buoyancy control system and thermal -- magnetic energy harvesting system. Jellyfish morphology, swimming mechanism and muscle architecture were critically reviewed to accurately describe the natural behavior and material …
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Investigations of Electron, Ion, and Proton Transport in Zirconium-based Metal-Organic Frameworks
… and the relative contribution of electron and ionic transport in the voltammetry of zirconium-based MOFs. First, we investigated the effects that the quinone ligand orientation inside two new UiO-type metal-organic frameworks (2,6-Zr-AQ-MOF and 1,4-Zr-AQ-MOF) have on the ability of the MOFs to …