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 33 for “"Electrokinetics"”.
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Electrokinetics in the Earth
… In this thesis study of frequency-dependent electrokinetics is presented with both theoretical development and experimental verification. The complex (real and imaginary) streaming potential coupling coefficient is explained. This is followed by the first experiments to measure the real and …
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Electrochemistry and Electrokinetics in Microchannels
The main body of this work considers the design and development of a microfluidic, continuous electrochemical sensor capable of measuring accurate potential differences. The key challenge in creating such a device is the implementation of a miniaturized reference electrode and salt bridge. The …
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Induced-charge electrokinetics at large voltages
The classical transport theory cannot explain the experimental behavior of electrochemical systems in the extreme operating conditions required by modern microfluidics devices. Some experimental puzzles include strange behavior of colloidal particles, high-frequency flow reversal in microfluidic …
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Efficiency of biosurfactants applied by means of electrokinetics
… as a new in-situ remediation technology: bio-electrokinetics.
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Nonequilibrium electromechanical interactions in cartilage : swelling and electrokinetics
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Nonlinear electrokinetics of the bacterial cell envelope for applications in biomicrofluidics
… simulations to model the influence of soft layer electrokinetics on bacterial electroporation. Electroporation is a biotechnological tool for intracellular delivery of external molecules by generating pores on the cell membrane using strong but brief pulsed electric fields (~1 ms duration). The …
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Distribution of ammonium nitrate as nitrogen containing nutrient for in-situ biodegradation by means of electrokinetics
In-situ bioremediation is a technology, which has recently gained the attention of specialists for the clean-up of hydrocarbons. Organic chemicals are persistent and hard to deal with, because they are usually present in three forms: dissolved into groundwater, as free product over the groundwater …
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Particle Manipulation Using Electric Field Gradients in Microdevices
Electrokinetics is a family of effects that induces motion of a liquid or a particle within a liquid in response to an external electric field. Using the intrinsic electrical properties of bacteria and of breast cancer cells, electrokinetics can be used to manipulate these particles for two …
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Design of the surfactant enhanced electrokinetic system for hydrocarbons removal from clayey soils in pilot scale conditions
… expensive and in some cases ineffective. Electrokinetics (EK), which is an emerging technology due to its applicability in low permeable soils (clays), seems to be a promising methodology for solving the above mentioned problems. EK is associated with applying a DC current between …
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Surface characterization of self-assembled monolayers for applications of selective ionic transport through nanoporous membranes
Electrokinetics is the study of ionized particles or molecules and their interactions under an applied electric field. Transport processes include those of colloids and other charged particles in electrolytes, whose motion under applied external electric fields is described in part by fluid …
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Sulfate attack on cement paste with volcanic ash : durability analysis
… when exposed to accelerated sulfate attack via electrokinetics. The test specimens were exposed to sodium and magnesium sulfate solutions for a period of 30 days. The effect of gradual decomposition of calcium-silicate-hydrate (C-S-H) gel was examined using Raman spectroscopy and Magic Angle …
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Mathematical modeling of lithium-ion intercalation particles and their electrochemical dynamics
… numerically investigate the thermodynamics and electrokinetics of the 1D spherical CHR model with different possible material properties in detail. We also extend the CHR model to 2D and briefly study the effects of the surface electron-conducting coating layer. We also work on the Marcus …
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Application of electrokinetic remediation on contaminated alluvial soils in Sri Gading, Batu Pahat,
… selected to be remediated by various types of electrokinetics setup, to list out the best electrokinetic parameters. Results obtained from these setup led to the development of the most optimised electrokinetic setup, especially in remediating radionuclides. Data analysis showed that …
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Hydraulic and Electrokinetic Delivery of Remediants for In-situ Remediation
… and silt flooded with TCE at aqueous solubility. Electrokinetics (EK) was used to enhance permanganate delivery through the silt layers. The suite of experiments demonstrated that EK was able to drive more permanganate at a faster rate throughout the silt layers in comparison to no-EK experiments. …
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Controlled Surface Layer Deposition for Steel Surface Hardening
… between the three mechanistic stages of the electrokinetics of the process: (1) surface saturation; (2) compression of the diffuse layer, growth of a polymer-rich layer, and/or competition between the mobility of Ti and PDADMAC; and (3) little or no decrease in electrophoretic mobility of Ti, …
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Micro fuel cell and nanoscale colloidal separation systems: design, fabrication, and characterization
… and micro fuel cells. Last, the possibility of Electrokinetics-based device with alternating current (AC) traveling waveform membrane is validated for the applications of water purification and colloidal removal. The development of the membrane is simulated by engineering software. The membrane …
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Use of electrokinetic and reactive barriers to treat heavy metals-contaminated soils
… among the more difficult elements to remove by electrokinetics. The goal and the novelty of the research consisted of evaluating the synergic interaction between the EK system and the RB and to compare the efficiency of such combined treatment with usual, unenhanced EK remediation process. From …
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Selective Ion Separations Using Shock Electrodialysis
… nondestructive electrochemical processes, namely electrokinetics and electrosorption, with special attention given to emerging methods such as shock ED. The second major thrust is the design of processes and operating conditions to demonstrate the broad applicability of shock ED for selective ion …
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Influence of external environment on fluid/ion transport in confined nanoscale systems
"The advancements in micro-nano-manufacturing technology has lead to a significant leap in understanding the nuances of transport phenomenon in nanopore architecture. The large nanopore surface compared to the volume favors a predominant transport of ions. The environment results in a near ideal …
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Alternating Current Electroosmotic Micropumping Using A Square Spiral Microelectrode Array
An alternating current electroosmotic micro pumping device has been designed, experimentally tested and theoretically analyzed using an electrohydrodynamic theoretical model applied to a computer simulation model. The device SP-1 is a microelectrode array which uses the principal of AC …
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