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 “"Photoelectrochemistry"”.
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Study of Semiconducting Nanomaterials: Photoelectrochemistry and Dynamic Light Scattering
This dissertation discusses photoelectrochemical studies on zinc oxide (ZnO) nanomaterials and stochastic collision studies of bare and sensitized titanium dioxide (TiO2) nanoparticles (NPs). A detailed study of NP colloidal behavior has been described with respect to dynamic light scattering (DLS) …
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Experimental and ab initio studies of oxide interfaces for photoelectrochemistry
The threats posed by anthropogenic climate change have spurred a research thrust towards renewable, carbon-free sources of energy. Photoelectrochemical (PEC) approaches are particularly attractive, combining energy capture from the sun with storage in the form of hydrogen or hydrocarbon fuel. …
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Semi-Artificial Photoelectrochemistry through Perovskite Integration and Elucidation of the Local Environment
Semi-artificial photoelectrochemistry combines state-of-the-art semiconductors developed in the photovoltaic industry with highly selective and active biological catalysts evolved for specific fuel-forming reactions. The biohybrids combine the benefits of both photovoltaic and bioelectrochemical …
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Use of microelectrochemical devices to study diffusion of electroactive species in nonfluid media and photoelectrochemistry of surface-confined metallocenes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1994.
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Integrating photosystem II and electroactive bacteria with three-dimensional electrodes for semi-artificial photosynthesis
… tin oxide (IO-ITO) electrodes for protein film-photoelectrochemistry with photosystem II. The relationships of IO-ITO electrode structure and photosystem II activity were discussed following a combination of microscopic, spectroscopic and photoelectrochemical characterisations. Chapter 4 reports …
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Photoelectrochemical microscopy studies of transition metal dichalcogenides nanoflakes: addressing open questions of structure-function relationships
… materials, a strong understanding of fundamental photoelectrochemistry and related processes is necessary. Photoelectrochemical microscopy methods are well poised in this aspect. Methods like scanning photoelectrochemical microscopy allow for the excitation of small, localized region of a material …
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Photoelectromechanical synthesis of low-cost DNA microarrays
… synthesis platform based on semiconductor photoelectrochemistry (PEC) designed with these needs in mind. An amorphous silicon photoconductor is activated by an optical projection system to create "virtual electrodes" that electrochemically generate protons in a site-selective manner, …
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Electrodeposition of epitaxial metal thin films on silicon for energy conversion and flexible electronics
… conversion and storage. The first paper: <em>Photoelectrochemistry of ultrathin, semi-transparent, and catalytic gold films electrodeposited epitaxially onto n-silicon (111)</em> describes the epitaxial electrodeposition of Au thin films on n-type Si using a simple HAuCl4 bath and the …
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The micro-optical ring electrode: a new and novel electrode system for photoeletrochemistry
… reported, achieved via the interrogation of the photoelectrochemistry of MB+. Photocurrent signals obtained during cyclic voltammetric and chronoamperometric studies of MB\ conducted with the MORE under illuminated conditions and in the absence of any deliberately added reducing agent, are …
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Using molecule-surface interactions for improved photoelectrochemical device performance and modeling
… materials, biochemistry, catalysis, and photoelectrochemistry. Surface functionalization is becoming increasingly popular in the field of photoelectrochemical (PEC) water-splitting, a promising carbon-free approach to produce hydrogen from liquid water. PEC water- splitting cells consist …
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Plastic and mixed waste as feedstocks for solar-driven H₂ production
… of nuclear magnetic resonance spectroscopy, photoelectrochemistry and adsorption experiments. Surface interactions, rather than reaction thermodynamics, are suggested to determine which oxidation intermediates are observed during photoreforming. The scaling potential of photoreforming is …
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Development of Reactor Technology for the Photoelectrolysis of Seawater
… the world. Photocatalysis and by extension, photoelectrochemistry (PEC), is a process capable of environmental remediation and energy production via water splitting. This research focuses upon the development of novel materials and reactor technology which can be deployed for the purpose of …
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Studies of Molecular and Colloidal Semiconductors and Their Mass Transport Properties by Voltammetry, Stochastic Electrochemistry, and Electrogenerated Chemiluminescence
This dissertation discusses stochastic photoelectrochemistry of titanium dioxide (TiO2) nanoparticles (NPs) in methanol (on fluorine-doped tin oxide (FTO) microelectrodes and in aqueous media (Pt microelectrode). In parallel with photoelectrochemical current (PEC) measurements, colloidal behavior …
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Electrochemical wiring of cyanobacteria to anodes using polymers towards biohybrid devices for solar-chemical production
… structures. By using tailored analytical photoelectrochemistry methods, we were able to identify the conditions under which each polymer served only as an immobilisation matrix, enhancing the photocurrent by means of increasing the cell loading rather than by mediation. The contribution of …
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Elucidating the bio-electrochemical mechanism of exoelectrogenesis of the cyanobacterium Synechocystis sp. PCC6803
… exoelectrogenesis using a combined experimental photoelectrochemistry and modelling approach. Exoelectrogenesis was also explored as a protective behaviour against ‘excess’ electrons generated during stress conditions. High light or rapidly changing light, iron limitation, carbon limitation and …
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LIGHT AND ELECTRICITY: POWERFUL TOOLS FOR NEW SUSTAINABLE STEREOSELECTIVE SYNTHESIS
… photoredox catalysis (e-PRC) and interfacial photoelectrochemistry (i-PCR). Chapter 2 concerns the electrochemical dehydrogenative homo-coupling of β-Naphtylamines derivatives: first, Chapter 2.1 reports a comprehensive description of the electrochemical homo- and cross- coupling between …
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Preparation of oriented molybdenum disulfide thin films for photoelectrochemical energy havesting applications
Group VI layered transition metal dichacogenides (LTMDs) have been considered as good candidates of semiconductor electrodes for photoelectrochemical (PEC) solar cells due to their suitable band gap for solar energy absorption and extremely good stability. However, the scalable synthesis of bulk …
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Molecular Hybrid Photocathodes Based on Silicon for Solar Fuel Synthesis
Artificial photosynthesis is broadly defined as the process of solar energy conversion into chemical fuels and represents a promising route towards alleviating the global energy crisis. In this context, the development of photocathodes for the use in photoelectrochemical cells is an attractive …
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Towards unravelling the mechanism and function of exoelectrogenesis in cyanobacteria
… for exoelectrogenic activity. By conducting photoelectrochemistry of cyanobacterial biofilms on the microscope, with ThT as a V<sub>m</sub> reporter, a robust, reproducible V<sub>m</sub> response is observed during exoelectrogenesis. This response is tested under a series of relevant …
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