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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 23 for “"ionic charge"”.
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Modeling, simulation, and control of a polypyrrole-based conducting polymer actuator
A detailed model was developed for an ionic electro-active polymer (EAP) actuator. The electrical and chemical domains of the system were modeled using a simple electrical circuit. Ionic charge storage within the polymer was described using a linear reticulated model. This model improves upon the …
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Observation of high iron charge states in solar energetic particle events
<p>The ionic charge states of Solar Energetic Particle (SEP) events provide direct information about the source plasma and the acceleration environment. In this thesis, we mainly build on charge state observation of SEP events during late 1997 to 2000 with from Solar Energetic Particle Ionic Charge …
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Molecular Elucidation of Reaction Mechanisms in Aluminum & Lithium Metal Batteries by Solid-State NMR Spectroscopy and Electrochemical Methods
… geopolitical constraints on its use. The rechargeable aluminum battery field is still emerging and thus only a small number of cathode materials have been successfully demonstrated, while fewer still have well understood charge storage mechanisms. In addition, the electrolytes needed to …
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The Stabilization of MN (I) and MN (II) Oxidation States by the Formation of Coordination Compounds
… Kossel suggested that this was the result of the charge to size ratio of the ions, for, from a consideration of electrostatic data, he pointed out that a metal with a high ionic charge and a small ionic radius would form coordination compounds of the greatest stability. De, working independently, …
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Nano-Confined Room-Temperature Ionic Liquids for Electrochemical Applications
Room-temperature ionic liquids (RTILs) and their derivatives are promising electrolytes for electrochemical devices including supercapacitors. Understanding the behavior of RTILs in these devices is critical for improving their performance. The energy density of supercapacitors can be improved …
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Utilização De Polímeros à Base De Acrilamida Na Remoção De Cobre De Meio Aquoso
… by SNF Floerger, with varying degrees of ionicity which is the parameter examined on the extraction of copper. We used the FA polymers FA 920 SH, AH 912 SH, AN 905 SH, AN 910 SH, AN 923 SH, AN 945 SH, AN 956 SH and AN 977 SH, which have anionicities different from each other and growing in …
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Tuning Heterogeneous Catalysis Using Interfacial Polarization
… catalysis. Unlike for a gas-solid interface, charge transfer events at a solid-liquid interface can polarize the interface, resulting in a local environment at the active site that is radically distinct from the environment in the bulk liquid phase. Thus, unraveling the influence of electrical …
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Migration Stimulating Factor, the search for inhibitors.
… was fractionated by both molecular weight and ionic charge, followed by sequence analysis which identified the inhibitor as Neutrophil Gelatinase Associated Lipocalin (NGAL). Both recombinant and cell-produced NGAL neutralise the motogenic activity of MSF. This novel bioactivity for NGAL is not …
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Electromigration and chemical diffusion in titanium carbide
The ionic charge and lattice diffusion of carbon in titanium carbide have been investigated through studies of diffusion under the influences of kan applied dc-electric field and of a chemical potential. The electron microprobe was used to measure the diffusion concentration profiles. …
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Molecular dynamics studies of the structure–dynamics relationship in concentrated nonaqueous electrolytic solutions
… phase of electrolytes provides the medium for ionic charge transport between the electrodes of electrochemical systems used in energy storage. The chemically-specific equilibrium spatial distribution of ionic species in electrolytic solutions, and the chemical equilibrium that exists between …
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Development of a force field with condensed phase consistent charges for N,N' - dialkylimidazolium room temperature ionic liquids
Most force field models for Room temperature ionic liquids cannot properly elucidate statics and dynamics. It is in this context that we set to assess the most efficient way to model RTILs while maintaining the integrity of the liquids statics and dynamics. The development approach begins with the …
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Nanofiltration Rejection of Contaminants of Emerging Concern from Municipal Water Resource Recovery Facility Secondary Effluents for Potable Reuse Applications
… predicted the NF rejection CECs based on size, ionic charge, and hydrophobicity. Furthermore, the QMPM was verified against a CEC rejection dataset published by an independent study for a similar commercially available TFC NF membrane.</p>
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Soft matter engineering for cellular bioelectronic interfaces
… nature, interactions between living systems and charged entities occur across multiple scales (cells, tissues, organ systems). These interfaces between electrical and living systems, known as bioelectronics, can be leveraged to monitor and modulate biological functions. In partic- ular, …
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Nanostructured Organic and Inorganic Thin Films With Novel Molecular Recognition Properties
… include a striking observation of an enhanced, ionic-charge-specific molecular discrimination. Taken together, the results suggest that assembly of secondary adsorbate layers of phospholipids provide an interesting method for modifying the electrochemical properties of thiolate SAMs on gold. …
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Advancing Step-Growth Polymers: Novel Macromolecular Design and Electrostatic Interactions in Polyesters and Polyurethanes
… synthetic strategy enabled selective control of ionic charge placement into the hard segment or soft segment block of segmented copolyesters using melt transesterification. The ionic placement impacted the microphase-separated morphology, which influenced its thermomechanical properties and …
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A path to biodiscovery: isolating Antarctic ascidian-associated bacteria and screening genomes for secondary metabolite-encoded biosynthetic gene clusters and signatures of cold adaptation
… form rigid kinks in protein sequences. Likewise, charged amino acids and arginine/(arginine+lysine) content, which form protein-stabilizing salt bridges believed to hinder protein function at low temperatures were reduced. The predicted Antarctic proteins also followed the established trend of …
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Ionic separation in electrodialysis : analyses of boundary layer, cationic partitioning, and overlimiting current
… model was developed for the steady-state ionic transport in a two-dimensional cell pair. Faster ionic separations were achieved with smaller means, greater standard deviations, and more positive correlation coefficients. With the increasing flow velocity from 1.06 to 4.24 cm/s in the …
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Synthesis and Characterization of Siloles, Silole-Containing Polymers and Photoswitchable Polymer Brush
… light stimulus by altering their polarity, ionic charge and solubility. In our preliminary study, we have shown that charged species can be adsorbed and release by the brushes with irradiation of UV and visible light, respectively. These polymer brushes can be used for isolation of charged …
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Tunable viscoelasticity, morphology, and charge transport of dynamic covalent polymers
… despite its potential to enhance morphology and charge transport. In a first project, the influence of crosslinking density and salt concentration on viscoelasticity, salt coordination, and ionic conductivity in vinylogous urethane (VU) vitrimers was systematically studied. Salt-containing …
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Defects and Ionic Transport at Reduced Temperatures -- Electric Field and Optical Control on Nanoscopic Spatial Scales
… challenge in the field of Solid-State Ionics. In this thesis, electric field and optical-based tools were developed capable of manipulating and quantifying the ionic transport properties of model oxygen ion conducting metal oxides systems at these temperatures. First, we show that ionic …
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