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 37 for “"Electric double layer"”.
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"Accurate Characterization and Modeling of Electric Double-Layer Supercapacitors"
L'abstract è presente nell'allegato / the abstract is in the attachment
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Carbon-based electric double layer capacitors for water desalination
In capacitive deionization (CDI), salt water is passed through two polarized electrodes, whereby salt is adsorbed onto the electrode surface and removed from the water stream. This approach has received renewed interest for water desalination due to the development of new high-surface area, …
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Characterization of electric double layer structure at electrode/water interface
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Ionic separation in electrodialysis : analyses of boundary layer, cationic partitioning, and overlimiting current
… performance strongly depends on the boundary layer near ion exchange membranes. The thickness of the boundary layer has not been clearly evaluated due to its substantial fluctuation around the spacer geometry. In this study, the boundary layer thickness was defined with three statistical …
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Stabilization of Magnetite Nanofluid and its Transport in Porous Media
… principles of surface/colloidal chemistry and electric double layer are applied for the selection of surfactants to achieve stabilized nanofluid dispersions. For nanoparticle applications in subsurface, the salinity of reservoir water needs to be considered. The dispersion of nanoparticles is …
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Predictive Modeling of Diffusional Processes Within the Hydrated Layer of Vitrified Nuclear Waste Forms
… a structurally altered, highly hydrated layer forms. The distribution of the glass constituents within this layer has been investigated through development of mathematical models representing the fundamental mechanisms that describe the formation of those gel layers. These mechanisms …
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Towards Ion Channel Based Nanofluidic Devices: Simulations of Water and Electrolyte Transport in Nanotubes and Channels
… flow in the presence of an external electric field indicating the presence of an electric double layer at net zero surface charge, contrary to the expectations from classical continuum theory. I-V curves in a channel-bath system using ionic mobilities from molecular dynamics …
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Adsorption on smooth electrodes: A radiotracer study
… on the structure and composition of the electric double layer. The emphasis of this research was on studying adsorption processes at smooth electrodes of copper, gold, and platinum. The application of the radiotracer method to these smooth surfaces have led to direct in-situ measurements …
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Design considerations and characterization of Origami [TM] electrochemical capacitors
… known as supercapacitors, ultracapacitors, and electric double-layer capacitors, have recently received attention as electrical energy storage devices. The devices are both high power and high energy, making them ideally suited for load balancing applications in such demanding applications as …
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A study of seismoelectric signals in measurement while drilling
… acoustic wave can move the excess charge in the electric double layer along the borehole wall to generate a streaming electric field. This thesis is an experimental and theoretical investigation of the electric field induced by the multipole LWD acoustic wave. The main goal of this thesis is to …
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Under confinement : molecular dynamics investigations of ions and molecules in nanopores and at nanoscale interfaces.
… importance in chemical applications such as electrical energy storage and water desalination. Investigations into carbon based structures such as carbon nanotubes and graphene sheets with confined fluids are promising for the enhancement of such technologies. Through molecular dynamics …
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Molecular dynamics simulations of EMIM − BF4 ionic liquid for electrospray thrusters
… of EMIM − BF4 under the influence of an external electric field, and the process of fragmentation that occurs in the electrospray’s plume for dimer and trimer ionic species. In order to compare the all atom and the coarse grained model, bulk simulations were performed to replicate the properties …
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Interfacial and long-range electron transfer at the mineral-microbe interface
… in direct contact with mineral surfaces, monolayers of purified decaheme cytochromes from the metal-reducing bacterium Shewanella oneidensis were prepared on Au(111) surfaces. Recombinant tetracysteine sequences were added to two outermembrane decaheme cytochromes (OmcA and MtrC) from S. …
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Interaction of Nanoparticles with RF, AC, and Static Magnetic Fields in Thermal and Non-Thermal Cancer Therapy Applications
… we determine the interaction of axial electric field with the electric double layer at the NPs/protein/ions interface leads to the SAR overestimation. To improve efficiency of NP targeting, a thermal therapy targeting specific heat sensitive ion channels which overcomes the drawbacks of …
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Investigation of Two-Dimensional Structured Polyaniline for Supercapacitor Applications
… behaviour, which is absent in current EDL (electric double layer)- modulated systems, was comprehensively studied in the 2D structured tungstate anion linked polyaniline (TALP) using the gravimetric probe, electrochemical quartz crystal microbalance. It is revealed that the anion nature …
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Nuclear Magnetic Resonance Studies of Ion Adsorption in Supercapacitor Electrodes
Supercapacitors (or electric double-layer capacitors) are high power energy storage devices that store charge by the non-faradaic adsorption of ions at the interface between porous carbon electrodes and an electrolyte solution. The development of new electrode materials and electrolytes with …
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Sum Frequency Generation Spectroscopy of Imidazolium-based Ionic Liquids with Cyano-functionalized Anions at Gas-Liquid and Solid-Liquid Interfaces
… the solid salt surface to form a Helmholtz-like electric double layer. At the BaF2(111)-[EMIM][TCB] interface, however, a strongly-bound layer of anions populating the first layer resulted to a much larger counter-ion charge delivered near the crystal salt surface than required to effectively …
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Synthesis and characterization of ionic liquid electrolytes for use in electrical energy storage devices at elevated temperatures
Electric energy storage (EES) devices like lithium ion batteries and supercapacitors have limited operational temperatures between 0 and 40 oC, preventing their use in demanding, high temperature applications. The principal limitation of these systems is the flammable and volatile carbonate-based …
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Bridging the gap between atomistic and continuum models to predict dielectric and thermodynamic properties of confined fluids
… the structure but also accurately describe the dielectric permittivity and its anisotropic nature in the confinement. Using the CG potentials in EQT we show that neglecting the tensorial form of the dielectric permittivity in the Poisson equation leads to incorrect screening and orientational …
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