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 15 of 15 for “"Microtube"”.
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Self-rolled-up microtube technology for cellular outgrowth guidance and monitoring
… and strain-based sensor systems. These microtube-forming membranes are easily fabricated and can be integrated into a microfluidic channel (or become the channel itself) which can be easily integrated into an intravenous or catheter tube for diagnostics. In this dissertation, the …
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The Simulation, Development, and Testing of a Staged Catalytic Microtube Ignition System
… safety. This study demonstrates that catalytic microtubes can be used to cause ignition of a bipropellant mixture in a rocket application and develops a unique ignition system as a low energy alternative or redundant ignition system as compared to current spark systems. Part I covers the …
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Biocompatible silicon nitride thin films for self-rolled-up microtube technologies: guiding neurons
… and strain-based sensor systems. These microtube-forming membranes are easily fabricated and can be integrated into a microfluidic channel (or become the channel itself) which can be easily integrated into an intravenous or catheter tube for diagnostics. Taking advantage of SiNx’s …
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Miniaturization of on-chip passive electronic devices by silicon nitride self-rolled-up membrane microtube nanotechnology
… on-chip three-dimensional (3-D) rolled-up microtube structures. By taking lumped inductors and transformers, this thesis demonstrates a global solution to obtain on-chip lumped elements with an extremely small on-chip footprint and almost complete immunity to substrate issues. The …
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Application of self-rolled-up membrane technology for enhanced neuron guidance and alignment
… characterization of neurite growth on the microtube platform, we demonstrate enhanced alignment of neurites along the microtube topography. Following modification of microtube geometry, we found that adjustment to microtube array pitch improves neurite alignment compared to a static pitch, …
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Mechanistic Understanding and Enhancing Pool Boiling Heat Transfer via Surface Property and Structure Design
… CHF and HTC enhancements. We developed a microtube structure, where a cavity is defined at the center of a pillar, to enhance the heat transfer characteristics in controllable manner. In addition to uniform microtube arrays, we designed a surface with microtube clusters interspersed with …
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Development of Novel Methodologies for the Electrodeposition of Polypyrrole-based Films in Controlled Morphologies with Potential Application in Nitrate Sensing.
… (PPyEtCN) into nanowire and microtube morphologies is reported. Cyclic and pulsed electrochemical techniques were employed to electrodeposit copper micro and nano particles at PPyEtCN and polypyrrole (PPy) surfaces. A PPy nanowire/copper modified electrode was investigated for …
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Microparticle Influenced Electroosmotic Flow
… fraction and particle type was conducted using microtube inner diameters of 100 – 300 micrometers. It was found that the effective electroosmotic mobility decreases with increasing microtube diameter. A numerical study of microparticle influenced electroosmotic flow was also conducted for …
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Thermally Developing Electro-Osmotic Convection in Circular Microchannels
… generated flow has been analyzed for a circular microtube under imposed constant wall temperature (CWT) and constant wall heat flux (CHF) boundary conditions. Established by a voltage potential gradient along the length of the microtube, the hydrodynamics of such a flow dictate either a slug flow …
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Modelling the Endothelial Glycocalyx Layer
… the motion of a rigid particle through a microtube which has a non-uniform wall shape, is filled with a viscous Newtonian fluid, and is lined with a thin poroelastic layer. This is relevant to the transport of small rigid cells (such as neutrophils) through microvessels that are lined with …
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Identify Signature Genes/Pathways to Characterize Alzheimer's Disease Subtypes Based on Uncoupled Tauopathies and Cognitive Decline
… change hallmarks in AD brains, in which microtube protein tau forms scar-like neurofibrillary tangles that kill neurons. However, subgroups of patients present unmatched tauopathy progression with their cognitive decline. A detailed study on these so-called atypical AD patients allows for …
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Determination of the Leak Size Critical to Package Sterility Maintenance
… pressures (Po) required to initiate flow through microtubes of IDs 0, 2, 5, 7, 10, 20 or 50 m, were measured using 63 test cells filled with safranin red dye, tryptic soy broth, and distilled water with surface tensions of 18.69 mN/m, 44.09 mN/m, and 64.67 mN/m, respectively. Significant …
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Competitive Enzyme Immunoassay by Polyclonal Antibodies Against Organophosphorus Pesticides
… required to test OPs.</p> <p>Microwells and microtubes were utilized as the solid-phase immobilization for the development of an enzyme immunoassay for OPs. A sensitive and simple microtube based competition enzyme immunoassay for the quantitative determination of organophosphorus compounds …
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Mechanics Analysis of Semiconductor Nanotube Formation Driven By Residual Mismatch Strain
The intent of this thesis is to investigate the formation mechanics of bi-layer semiconductor nanotubes (SNTs). SNTs are a promising architecture for use in a variety of applications from quantum structures to building blocks in micro- and nano-electro-mechanical systems. Bi-layer SNTs are …
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Thermal Management Using Liquid-vapor Phase Change in Nanochannels
… is continuously fed to the sample through a microtube so that it matches the evaporation rate. Heat flux as high as ∼294 W/cm2 is achieved from channels and pores. The experimental findings are applied to evaluate the use of porous nanochannel geometry in spray cooling application and is …