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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 35 for “"Ionic transport"”.
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Ionic Transport in Lead Diborate Glass
Made available in DSpace on 2014-12-10T17:32:40Z (GMT). No. of bitstreams: 1 7013288.pdf: 2735709 bytes, checksum: daa2e9d96b3f1451333b8eb880384950 (MD5) Previous issue date: 1969
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Harnessing Solid-State Ionic Transport for Nanomanufacturing and Nanodevices
… has been developed and characterized. This ionic-transport-based patterning technique is capable of sub-50nm feature resolution under ambient conditions. It generates features with a rate that is comparable to conventional dry-etching techniques. A numerical model has also been developed to …
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Modeling of Electronic and Ionic Transport Resistances Within Lithium-Ion Battery Cathodes
… It was found electronic and liquid-phase ionic transport resistances are strongly coupled to particle conductivity, size, and distribution of particle sizes. The accuracy of determining effective resistances was increased by accounting for how particle's size, volume fraction, and …
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Understanding ionic transport in the macrostructure of polysaccharide bound electrodes for capacitive deionization
… trend. To simulate impact of charged binders on ionic transport within the electrode macropores, MCDI sub-units were introduced. At a MCDI surface coverage of 7.5% we observe the co-ion repulsion peak disappears as a result of the addition of fixed charge. When decreasing the membrane thickness, …
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Surface characterization of self-assembled monolayers for applications of selective ionic transport through nanoporous membranes
… 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 mechanics. In particular, there is growing interest for the application of …
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Investigation of the crystal structure, elemental composition and peculiarities of ionic transport in Li+ solid electrolytes /
The influence of the structure and elemental composition of lithium solid electrolytes on their electrical properties are investigated in the dissertation. The technological conditions of lithium solid electrolyte ceramics‘ fabrication (synthesis and sintering) are described. Also the results of …
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Defects and Ionic Transport at Reduced Temperatures -- Electric Field and Optical Control on Nanoscopic Spatial Scales
The ability to study and control oxygen ion transport in metal oxide systems at reduced temperatures (<400°C) is key to the design of new generations of energy conversion/storage, memory and functional device applications, but has remained a significant challenge in the field of Solid-State Ionics. …
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A Study of The Effect of Membrane Targeting Antimicrobial Compounds on Ionic Transport Across Lipid Bilayer Membranes
The novel synthetic cationic peptide melimine is a chimera of two natural peptides, melittin and protamine. This peptide has a broad spectrum of antibacterial activity against both gram-positive and gram-negative bacteria while having no toxicity in mammalian cells. Melimine was initially …
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Voltage control of electrical, optical and magnetic properties of materials by solid state ionic transport and electrochemical reactions
… the controllability is through solid-state ionic transport and electrochemical reactions in thin film structures, where the properties of materials can be electrically controlled by a gate voltage in an addressable way. Here we explore using such ionic gating method to control the …
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Microwave-Frequency Conductivity of Alpha Silver-Iodide, Microwave Spectroscopy of Hydrogen-Bonded Species, and Design of a High-Temperature Nozzle Source
… with other recent measurements to interpret the ionic transport in terms of motion between the tetrahedral sites of the AgI lattice.
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Ionic separation in electrodialysis : analyses of boundary layer, cationic partitioning, and overlimiting current
… potential under conditions of the competitive transport between mono- and di-valent cations was used to estimate the statistical parameters. An uncertainty model was developed for the steady-state ionic transport in a two-dimensional cell pair. Faster ionic separations were achieved with …
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Sensing with Nanomaterials: Controlling Transport, Single Molecule Detection, and Voltage Sensing
… but also serve as disruptive membranes for ionic selectivity and sensing based applications. Atomic thinness of these materials affords a unique environment in an all-surface material to unlock challenges towards improving desalination, energy harvesting and DNA sensing. Within this thesis …
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Improving Understanding of Lithium-Oxygen Batteries Using Atomistic Simulations
… data, with innovative ways of measuring ionic transport. I examined how solvent metrics combining different properties such as solvent donor number and viscosity that are relatively easy to measure experimentally correlate with the atomistic lithium transport mechanisms that are quite …
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Exploring transport and phase behavior in nanoporous carbon materials
Understanding transport and phase behavior in nanopores has a substantial impact on applications involving membrane fabrication, single-molecule detection, oil reservoir modeling, and drug delivery. While transport and phase behavior in larger nanopores (>50 nm) approach bulk or are well-described …
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Tailoring the electrochemical properties of catholytes for solid-state sodium batteries
… is hindered by limited solid electrolyte ionic conductivity, poor interfacial compatibility with layered-oxide cathodes, and reduced cathode-level energy density resulting from inactive components within the composite electrodes. This dissertation investigates the electrochemical …
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Ion Transportation and Adsorption in Two-Dimensional Materials
Ion transportation and adsorption shape several of the modern technologies from batteries, supercapacitors and fuel cells, to water desalination, ion capture and storage, and salinity gradient energy harvesting. Most of the ionic devices function based on the transportation or adsorption of ions. …
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Simulation, Fabrication, and Characterisation of Ion Track-Etched Asymmetric Nanopores in Thin Amorphous SiO2 Membranes
… membranes provide with the highly asymmetric transport properties characteristic of long, conical nanopores. This work investigates conical nanopores in thin amorphous SiO2 (a-SiO2) membranes fabricated using ion track etching. 1 um thin a-SiO2 windows are irradiated with 2.2 GeV 197Au ions at …
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Simulation, Fabrication, and Characterisation of Ion Track-Etched Asymmetric Nanopores in Thin Amorphous SiO2 Membranes
… membranes provide with the highly asymmetric transport properties characteristic of long, conical nanopores. This work investigates conical nanopores in thin amorphous SiO2 (a-SiO2) membranes fabricated using ion track etching. 1 um thin a-SiO2 windows are irradiated with 2.2 GeV 197Au ions at …
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Structure and properties interrelationships of SrBi₂(Ta<sub>1-x</sub>Nb<sub>x</sub>)₂O₉
… aspect of view, optical properties and ionic transport phenomena of SBTN bulk ceramics were investigated for the first time. The reason of using bulk ceramics is to exclude the difficulties associated with thin film technology, e.g., grain size effect and electrode-ferroelectric …
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Investigations of Electron, Ion, and Proton Transport in Zirconium-based Metal-Organic Frameworks
… of the mechanism of electron, proton, and ion transport in these porous structures is needed for their application in electronic devices. The current work focuses on contributing to such understanding by investigating proton-coupled electron transfer, capacitance performance, and the relative …
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