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 11 of 11 for “"nanoporous membrane"”.
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Fabrication of a nanoporous membrane device for high heat flux evaporative cooling
We investigated the experimental performance of a nanoporous membrane for ultra-high heat flux dissipation from high performance integrated circuits. The biporous evaporation device utilizes thermally-connected, mechanically-supported, high capillarity membranes that maximize thin film evaporation …
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Electrochemical multiphase microsensor for detection of acetylcholinesterase inhibitors
… experiments and COMSOL simulations. A Teflon nanoporous membrane is used to enhance the stability of gas-liquid interface as well as sensitivity of detection. A toxic gas of interest is injected into the vapor microchannel and reacts with an alkaline oxime solution as it dissolves in the …
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Design and modeling of a high flux cooling device based on thin film evaporation from thin nanoporous membranes
… device based on thin film evaporation from a nanoporous membrane supported on microchannels. The concept utilizes the capillary pressure generated by the small pores to drive the liquid flow and largely reduces the viscous loss due to the thinness of the membrane. The interfacial transport has …
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Influence of external environment on fluid/ion transport in confined nanoscale systems
… results in a near ideal ion-selective nanoporous membrane. The selective nature of ions can be triggered in the fields like single molecule/particle sensing, preconcentration of analytes using electric field focusing and desalination applications. A single nanoporous membrane leveraged …
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Evaporation from nanopores : probing interfacial transport
… we designed and microfabricated an ultrathin nanoporous membrane as an experimental platform to overcome some critical challenges including: (1) realizing accurate and yet non-invasive interface temperature measurement; (2) decoupling the interfacial transport resistance from the thermofluidic …
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Nanoporous monolayer graphene membranes for water purification : from concept to realization
… foundation for a new class of highly permeable membranes for water purification and desalination. Though atomically thin, graphene exhibits both exceptional mechanical strength and imperviousness to atoms as small as helium. High-density, subnanometer pores within graphene have the potential for …
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Nanoporous dialysis membrane for microfluidic neural probes
… where molecules transport through the dialysis membrane on the neural probe. The thesis focuses on the fabrication, transfer, and characterization of two potential candidates, nanoporous graphene membrane and nanoporous silicon membrane, for the dialysis membrane in a neural probe. For both …
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Kinetics of Heat and Mass Transfer Near the Liquid-Vapor Interface
… fabricate and test an ultrathin, freestanding, nanoporous membrane designed to achieve high experimental sensitivity to the properties of the liquid-vapor interface. As a supplement to that experiment, we use highly-accurate direct simulation Monte Carlo calculations to validate the dusty-gas …
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Evaporation from nanoporous membranes for high heat flux thermal management
… for an evaporation device with a nanoporous membrane for high heat flux dissipation. Evaporation in the thin film regime is achieved using nanopores with reduced liquid film thicknesses while liquid pumping is enhanced using the capillary pressure of the 120 nm pores. The membrane …
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Wetting and phase-change phenomena on micro/nanostructures for enhanced heat transfer
… we investigated a different configuration using nanoporous membrane that decouples capillarity from the viscous resistance to demonstrate the potential heat dissipation capability. With nanoporous membranes with average pore diameters of 150 nm and thicknesses of 50 [mu]m, we achieved interfacial …
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Surface characterization of self-assembled monolayers for applications of selective ionic transport through nanoporous membranes
… for the application of electromigration through nanoporous membranes to water desalination. For thin double layers, the volumetric flow ratio (VFR) between electroosmosis and pressure driven flow is inversely proportional to 1⁄r^2 , indicating the advantages of utilizing electrokinetics for …