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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 19 of 19 for “"electrochemical quartz crystal microbalance"”.
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Interfacial Study of Copper Electrodeposition with the Electrochemical Quartz Crystal Microbalance (EQCM)
The electrochemical quartz crystal microbalance (EQCM) has been proven an effective mean of monitoring up to nano-scale mass changes related to electrode potential variations at its surface. The principles of operation are based on the converse piezoelectric response of quartz crystals to mass …
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Electrochemistry of Polyaniline-DNA System.
… (POPD-DNA) complexes can be synthesized electrochemically in acidic media in the potential range of –0.2V to 0.8 V vs. Ag/AgCl reference electrode, respectively. The ultraviolet-visible (UV-Vis) spectroscopy, the alternating-current impedance, the electrochemical quartz crystal …
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Production of nano-templated surfaces for quartz crystal microbalance
This thesis attempted to follow the "true Liquid crystalline templating" route using high concentrations of non-ionic surfactant in the liquid crystal matrix in order to fabricate a high surface area silver electrode onto the gold electrode substrate of an Electrochemical Quartz Crystal …
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Investigation of Two-Dimensional Structured Polyaniline for Supercapacitor Applications
… understanding and further development of electrochemical systems. Two-dimensional (2D) nanofluidic materials featuring well-organized flat nanochannels, as well as adjustable structural and chemical properties have emerged as promising candidates for energy storage, and more importantly, …
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Charge Storage Mechanism of Redox Polymers for Energy Storage
… friendliness. While most studies focused on electrochemical performance, their redox mechanisms are not well-studied, especially for n-type polymers. The objective of this dissertation is to investigate the charge storage mechanism of three n-type polymers by electrochemical quartz crystal …
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Polythiophene als sensitive Filme in chemischen Sensoren
… detection in aqueous electrolytes. The advanced electrochemical quartz crystal microbalance was used for investigating the electrochemical polymerisation and the redox cycling behaviour of the polymer films deposited on the liquid facing electrode of the quartz. This method is based on impedance …
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Investigating Layered Electrically Conductive Metal-Organic Frameworks For Supercapacitor Applications
… for next-generation supercapacitors. Their crystalline and tuneable structures facilitate structure-performance studies, which are challenging to conduct with traditional porous carbon electrodes. In this work, the electrochemical performances of layered conductive MOFs in supercapacitors …
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Electrochemical studies of oxygen reduction for aprotic lithium-oxygen batteries
… the rotating ring disk electrode (RRDE) and electrochemical quartz crystal microbalance (EQCM) methods, respectively. As the applied potential increases, the reaction mechanism for Li20 2 formation switches from solution to surface-mediated, with the most likely pathways being Li+-02- …
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Formation and Characterisation of Nanostructured Polypyrrole Films: Their Growth on Membrane Supports and Application in Heavy Metal Remediation
… of these coatings were examined using an electrochemical quartz crystal microbalance. It was found that polypyrrole doped with poly(sodium 4-styrenesulfonate) exhibited cation exchange behaviour, whereas the p-sulfonatocalix[4]arene-polypyrrole films exhibited mixed cation-anion exchange …
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Metal oxide electrocatalysts for alternative energy technologies
… electrocatalysts can be incorporated into photoelectrochemical devices, fuel cells, and other energy storage devices. The first section addresses the utilization of semiconductors that can harness solar energy for water splitting to generate hydrogen. An oxysulfide was studied in order to …
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Electrochemical Phase Formation of Ni and Ni-Fe Alloys in a Magnetic Field
… magnetic field were analysed in-situ with the Electrochemical Quartz Crystal Microbalance technique. Three theoretical models were chosen for characterizing the Ni nucleation: Scharifker-Hills (SH), Scharifker-Mostany (SM) and Heerman-Tarallo (HT). The AFM images proved that more nuclei appear …
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The micro-optical ring electrode: Development of a novel thin ring based device for spectrophotoelectrochemistry and its application to the study of rose bengal
… have at their disposal, for the study of photo- electrochemical systems, a range of sensors and devices such as rotating optical disc ring electrodes, optically transparent electrodes and optically transparent thin layer electrodes. A microelectrode is an electrode with at least one of its …
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Development of an EQCM-based sensor for metal ions
… presented of the components of a prototypical electrochemical quartz crystal microbalance (EQCM)-based sensor for metal ions. Designed for use in the nuclear industry, the sensor consists of a gold (Au) piezoelectrode modified by a Nafion® polymer layer impregnated with a cationic hydroxainic …
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Exploring the Electrode-Electrolyte Interface of Electrically Conductive Layered Metal-Organic Frameworks with Nuclear Magnetic Resonance
… (MOFs) have recently demonstrated promising electrochemical performances as supercapacitor electrode materials. The well-defined chemical structures of these crystalline porous electrodes facilitate structure-performance studies of a model electrode material. Despite this, there is a …
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Surface studies of Li-ion and Mg battery electrodes
… as well as Au coating on the LMO to improve electrochemical performance. Electrochemical quartz crystal microbalance (EQCM) was used to monitor changes in mass on the anode, SEM and AES were used to observe changes in surface morphology and chemical composition, and potentiostatic voltammetry …
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Tailoring the redox enzyme-material interface for enhanced electro- and photocatalytic fuel synthesis
… voltammetry (PFV), chronoamperometry (CA), and electrochemical quartz crystal microbalance (E-QCM) analysis. Electrostatic and H-bonding interactions are resolved, with electrostatic interactions responsible for enzyme orientation while enzyme desorption is strongly limited when strong H-bonding …
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Entwicklung neuartiger biomimetischer Sensoren: ein bifunktionaler Sensor auf Basis haptenisierter Cholinesterase
… solcher Sensoren mit einem EQCM-Gerät (electrochemical quartz crystal microbalance) ermöglicht es zwei Messsignale gleichzeitig aufzunehmen: die piezoelektrische Bestimmung einer Massebeladung und die amperometrische Detektion von Enzymaktivität auf der Sensoroberfläche. Für die Analytik …
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Interfacial processes in Li-ion batteries
… In this section. we report the results of electrochemical quartz crystal microbalance (EQCM), and Matrix assisted laser desorption ionization (MALDI) time of flight (TOF) mass spectrometry (MS) measurements along with detailed calculations examining the formation of the solid electrolyte …