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 10 of 10 for “"Active colloids"”.
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Direct visualization of electron transport among nonconjugated polymeric redox-active colloids via fluorescence microscopy
… electrical conduction in nonconjugated/redox active polymers has been explored only less than a decade, yet it is already showing promise as the basis for conductivities and charge transport (CT) distances relative to well-studied conjugated polymers. My Ph.D. research has been devoted to …
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Visualization of energy transfer among redox active polymeric colloids via in-situ fluorescence microscopy
… of the flow battery, as one example, the redox active ethyl viologen agent has been covalently bound within crosslinked polymeric colloids. Little is currently known about how electrons (energy) transfers either within or between redox active colloids (RAC). To elucidate this, contact-mediated …
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Organic macromolecular architectures for non-aqueous redox flow batteries
… and polymer architectures to create redox active materials. Here we attempt to produce an all-organic polymer battery in solution state using inexpensive Celgard separators to compete with experiencing large crossover. Our first example of such a material utilized viologen pendant groups as …
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Coupling Raman spectroscopy and scanning electrochemical microscopy for spectroelectrochemical analysis of electrode interfaces
… in the reactivity across the electrochemically active surface. Bulk electrochemical measurements are unable to parse out the contributions to different structural motifs and how they affect surface processes, leaving the spatial correlation between structure and reactivity unobtained. …
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Collective structure and dynamics of colloids far-from equilibrium
… conventional equilibrium framework of thinking, active matter opens a new direction for non-equilibrium physics, relevant or irrelevant to life. Without the simple rule to minimize free energy toward equilibrium, it is challenging to predict theoretically and study experimentally how a system …
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Soluble redox active macromolecular architectures and their electrochemical analysis for energy storage applications
Organic redox-active materials offer advantages of material tunability while maintaining high performance for next-generation energy storage and conversion solutions. Macromolecular architectures such as oligomers, polymers, and colloids have recently gained interest for their size-exclusion …
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Electrochemical mechanisms in nano-structured graphitic and redox-active polymeric architectures
… last part of this dissertation introduces redox-active polymers and advanced redox-active colloids as electrochemical energy storage carriers, which have shown facile charge transfer kinetics and good charge storage ability. Combining these macromolecular electrolytes with size-exclusion porous …
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Bacteria At Oil-Water Interfaces
Bacteria are active colloids whose collective motion is studied in the context of non-equilibrium statistical mechanics. Bacteria can also become trapped at or near fluid interfaces, impacting bacteria fate and interface mechanics. Here I study bacteria near hexadecane-water interfaces. I …
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Particle Transport in Confinement: Nonlinearity, Compressibility, and Steric Effects
… a solid boundary. We show that externally driven active colloids can trap and transport passive particles by steric interactions with a wall, which irreversibly changes the trajectories of particles across streamlines. Such an irreversible steric interaction is expected to play an important role …
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Enzymatically active microspheres for self-propelled colloidal engines
… elastase-coated PS particles are catalytically active, showing great potential to be used in biologically-friendly system.</p>