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 18 of 18 for “"Streaming Potential"”.
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Streaming potential studies on quartz
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Metallurgy, 1953.
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Forward modelling and inversion of streaming potential for the interpretation of hydraulic conditions from self-potential data
The self-potential method responds to the electrokinetic phenomenon of streaming potential and has been applied in hydrogeologic and engineering investigations to aid in the evaluation of subsurface hydraulic conditions. Of specific interest is the application of the method to embankment dam …
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Electrokinetics in the Earth
The study of Streaming potentials has applications in the earth sciences, ranging from fluid flow monitoring, to permeability determination, to studying the surface chemistry of rocks and minerals. In this thesis study of frequency-dependent electrokinetics is presented with both theoretical …
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DEVELOPMENT OF FREE-LABEL SENSING IN PLASTIC MICROFLUIDIC PLATFORMS USING PULSED STREAMING POTENTIALS (PSP)
… new label-free detection technique called Pulsed Streaming Potential (PSP). Its novelty relies on the adaptation of a classical electrokinetic phenomenon (streaming potential) into a tool which can evaluate molecular interplay in label-free fashion. Implementation of PSP to microfluidic platforms …
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Surface forces during electrophoretic assembly of micron scale silica particles
… the working electrode during application of a DC potential. The role of electrode reversibility was investigated and the performance of the as-deposited electrodes was improved by electrolytic plating of platinum. Particles were also seen to adhere to the substrate before reaching the electrode. …
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Electrodeposition of cermets
… acid in terms of the electrokinetic (zeta) potential and also as surface charge density. The methocl used was that of streaming potential and streaming current measurement
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Electrokinetic and Chemical Aspects of Transport of Chloride Brines Through Compacted Smectite Layers at Elevated Pressures (Electroosmosis, Streaming, Conductivity)
… of effluent chemical composition and of streaming potential. Confining pressure (CP) in these room temperature experiments was 5000 pounds per square inch (psi), differential hydraulic pressure (DHP) across the clay was 2000 psi, and mean hydraulic pressure (MHP) was 2300 psi. These …
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Theory for diffusional encounters in heterogeneous environments and multivalent electrolyte screening of charged interface
… a charged solid-liquid interface. We used the streaming potential technique to measure electrical potentials near negatively charged glass surface as a function of trivalent ion (Co(NH<sub>3</sub>)<sub>6</sub>Cl<sub>3</sub>) concentration, monovalent ion (KCl) concentration, and pH. Charge …
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Electrokinetic characteristics of particulate/liquid interfaces and their importance in contamination from semiconductor process liquids
… The techniques of microelectrophoresis and streaming potential using flat plates and filter membranes were used to this end. The data obtained have been utilized to understand and predict particulate contamination from liquids and deposition onto the wafer surfaces. This might in turn be …
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Stabilization of Submicron Metal Oxide Particles in Aqueous Media
… To complement the adsorption studies, a streaming potential instrument was built for use in measuring the adsorbed layer thickness of nonionic polymers on SiO₂. The research concluded with an examination of the effect of thermally induced insolubility on adsorption of a hydrogen-bonding …
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Evaluation of spontaneous potential for monitoring groundwater movement in karst terrain
Spontaneous potential (SP) is a geophysical method that measures naturally occurring voltage in the earth. Negative anomalies arise from electrokinetic, or streaming potential, effects resulting from the flow of groundwater. In this study SP was monitored at sites in karst terrain in Virginia. The …
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On the Mechanism of Hydrovoltaic Power Generation: Insights Into the Design and Function of Hydrovoltaic Devices
As it becomes increasingly apparent that a reliance on fossil fuels is unsustainable and damaging to the environment, scientists are working to identify novel sources of sustainable energy. Recently, the field of hydrovoltaics has emerged enabling the generation of renewable power from the transfer …
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Osmotic reflection coefficient
… unfavorable. It was found that the required potential energy could be computed with sufficient accuracy using the linearized Poisson-Boltzmann equation, high charge densities notwithstanding. In principle, another factor that might influence o in charged pores is the electrical body force due …
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Cellulose Nanocrystals: Size Characterization and Controlled Deposition by Inkjet Printing
… surface free energy, polarity, roughness, ζ-potential, and surface charge distribution in air by X-ray photoelectron spectroscopy, contact angle measurements, AFM, streaming potential, and scanning Kelvin probe microscopy (SKPM). Additionally, poly(ethylene glycol)-grafted glass substrates …
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NOVEL SOFT SURFACES WITH INTERESTING SURFACE AND BULK MORPHOLOGY
… led to the third study which investigates their potential non-adhesive or abhesive characteristic in both a laboratory scale and in a marine environment. The peak removal stress and the removal energy associated with the detachment of a rigid object from the surface of these triblock copolymers …
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Engineered osmosis technology for desalination of oil and gas exploration wastewaters: assessment of membrane performance and process sustainability
… ionic strength on membrane surface charge (zeta potential) using a combination of streaming potential measurements and theoretical modeling, (4) the impacts of membrane selection and operating conditions on the performance of FO membranes for treatment and desalination of raw produced water from …
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Fabrication of surface amine gradients by controlled-rate infusion for chromatographic applications
… a unique set-up was developed to measure streaming potential and zeta potential along the gradient capillary. Since surface amine groups exist as positively charged groups at acidic and neutral pHs, the measured zeta potential increased from the low amine end to the high amine end of the …