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 20 of 22 for “"surface mediated"”.
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Surface Mediated Transport and Reactions
The second system qualitatively evaluated surfaces for sustaining flames in confined sub-millimeter systems. A method for successfully preparing surfaces of ceramic (Al2O3) combustors to sustain homogeneous flames was developed. The transient and steady-state flames were characterized by …
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Surface-mediated mechanisms for defect engineering in zinc oxide
… oxygen interstitials (Oi) through metal oxide surfaces from the gas phase to annihilate VO in the underlying bulk. Developing novel mechanisms to control such diffusion process would be crucial in tailoring material defect chemistry for real life applications. The present work demostrates two …
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Surface-mediated mechanisms for defect engineering in metal oxides
… important in nanoscale applications, where surface-to-volume ratios are large. Various material processing protocols to exert such control have arisen, known collectively as “defect engineering”. Surfaces of themselves have shown promise as tools for such efforts. Surfaces offer efficient …
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Mechanisms of Adsorption and Surface-Mediated Aggregation of Intrinsically Disordered Protein Tau at Model Surfaces
… environment, including the presence of surfaces such as the cell membrane, and the presence of macromolecules in a crowded environment, has been implicated in the aggregation of tau protein. However, the exact role of surfaces in modulating Tau protein aggregation has not been explored …
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A microfluidic approach for the initiation and investigation of surface-mediated signal transduction processes on a single-cell level
… with antibodies directed against specific cell surface proteins, like the T cell receptor-associated kinase CD3 and the costimulatory molecule CD28 (CD; cluster of differentiation). The stimulation of the cells with the functionalized beads led to a rapid rise of their cytosolic Ca2+ …
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Iron (III) Oxide and Copper (II) Oxide Mediated Formation of PCDD/Fs from Thermal Degradation of 2-MCP and 1,2-DCBz
… it is well established that transition metal-mediated reactions account for the majority of PCDD/F emissions from combustion sources. Specifically, both copper and iron ions, which occur abundantly in combustion generated particulate matter, are considered probably the most active in promoting …
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Energetics and Dynamics in Quantum Confined Semiconductor Nanostructures
… electronic intraband relaxation, coupling to surface-mediated processes, and tunneling to the external environment. The relative dominance of these paths will vary from sample to sample. More importantly, within a sample, the contributions of the available pathways are found to change with …
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Probing Collective Motions and Hydration Dynamics of Biomolecules by a Wide Range Dielectric Spectroscopy
… around proteins to understand the effects of surface-mediated solvent dynamics, relationships among different measures of interfacial solvent dynamics, and protein-mediated solvent dynamics based on the complex dielectric response from 50 MHz up to 2 THz by using the system we developed. …
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Infrared and x-ray spectroscopic studies of the copper(II) oxide mediated reactions of chlorinated aromatic precursors to PCDD/F
… reactions following adsorption onto fly-ash surfaces. Current research implicates transition metals in promoting formation of phenoxyl radicals that react to form PCDD/F, although this has not been studied extensively. This objective of this work is to better understand PCDD/F formation from …
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Antifouling and Antithrombogenic Ultrathin Surface Chemistry for Bioanalytical and Biomedical Applications
… of biological species, or to inhibit the surface-mediated activation of potentially harmful biological processes, biomaterial research invariably faces the need for man-made, foreign surfaces intimately contacting bodily fluids/tissues to be `bioinert'. A popular strategy to address this …
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Understanding CO2 at aqueous interfaces using atomistic machine-learned potentials
… adsorbed at the air-water interface. This surface mediated mechanism involves the partial dissolution of the reaction site at the topmost water layer, imparting bulk-like thermodynamic properties on an inherently interfacial process. Second, we show the efficacy of MLIPs for estimating …
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Nonclassical Mechanisms to Inhibit β-Hematin Crystallization Illuminate the Cooperative Action of Antimalarials
… a nonclassical pathway that coexists with surface-mediated growth. On this basis, the dissertation develops a framework in which antimalarial inhibition may occur either at existing crystal surfaces or upstream through suppression of precursor populations and alteration of surface states. …
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Natural Polymeric Carriers for Local Delivery of Therapeutic Agents to Promote Enhanced Bone Regeneration
… release from keratin carriers or through fibrin surface-mediated delivery of siRNA targeting rhBMP-2 antagonists. For this reason, we developed an alternative natural polymer rhBMP-2 carrier from keratin. Keratin can be formed into a number of biomaterials which have advantages over collagen …
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Geometrical and electronic structure of metal oxide nanoparticles on silica and alumina
… formation were studied by changing the support surface. Studies of CuO on fumed alumina suggested copper species existed with a +2 oxidation state and as CuO sites with an oxocation like structure. Similar studies for the TiO2 supported CuO confirmed formation of CuO nanoparticles. These …
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Advances in Microfluidics and DNA Nanotechnology for Biomolecular Analysis
… conventional methods, which commonly rely upon surface-mediated manipulation of analytes. To begin, these fields are combined in a synergistic approach, with microscale electrophoresis utilised for the isolation of specific protein analytes on the basis of electrophoretic mobility, combined with …
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Characterization of Meta-Keratin Biomaterials Derived from Human Hair: Applications for Fiber Development
… work was to test the effect of increased surface area on the biological characteristics of human hair-derived keratin biomaterials. Since the bioactivity of keratin materials is believed to be largely controlled by surface-mediated mechanisms that are dependent on physical contacts between …
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Electrochemical studies of oxygen reduction for aprotic lithium-oxygen batteries
… for Li20 2 formation switches from solution to surface-mediated, with the most likely pathways being Li+-02- disproportionation and 2e- transfer to 02, respectively. These insights are applied to understanding nucleation and growth of Li 20 2 in Li-02 batteries, using high surface area …
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Self-assembly of nanostructured amphiphiles onto surfaces: Design principles for substrate mediated biomedical applications
… for their potentials to catalyze many substrate-mediated biomedical applications. These applications include artificial transplants, stents, scaffolds for tissue engineering, and underlying matrices for surface-based drug/gene delivery (also known as macro-scale drug delivery). They all require …
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Biosynthesis of polyhydroxyalkanoates and their medical applications
… of P(3HB) microspheres on the scaffold surfaces. Thus a microsphere coating was created on the 45S5Bioglass® scaffolds resulting in a composite scaffold with increased compressive strength, surface nanotopography and bioactivity as compared to the original 45S5Bioglass® scaffold. The …
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Advanced Materials for High-Energy Rechargeable Batteries: Borate Polyanion Cathodes and Silicon Anodes
… originated from the activation of an amorphous surface layer formed during synthesis and enhanced by mechanical treatment. These findings emphasise the critical role of rigorous characterisation in distinguishing genuine magnesium intercalation processes from capacity contributions arising due …
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