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Showing 1 to 20 of 28 for “"Scanning Electrochemical Microscopy"”.
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Novel Applications of Scanning Electrochemical Microscopy
Scanning Electrochemical Microscopy (SECM) is most commonly used to spatially resolve reaction rates, image surface topography and surface reactivity. In this research, SECM is applied to various chemical systems in order to resolve local reaction chemistry and to produce patterns with dimensions …
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DEVELOPMENT AND APPLICATIONS OF SCANNING ELECTROCHEMICAL MICROSCOPY (SECM)
Scanning electrochemical microscopy (SECM) is a novel surface analysis technique which can exhibit local chemical information at a sub-micron scale. SECM has been applied in many fields, such as determination of electron transfer and ion transfer at liquid/solid, reactivity/conductivity, or …
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Scanning electrochemical microscopy for the investigation of biosensors /
Saccharomyces cerevisiae cells were electrochemically investigated in a double redox mediator system with varying lipophilic mediators and optimal parameters were found. The yeast cells were later modified with a conductive polymer - polypyrrole and multi walled carbon nanotubes for evaluating …
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Spatially resolved ionic measurements with scanning electrochemical microscopy
Modern electrochemical energy storage systems operate by the concerted shuttling of electrons and cations between a cathode and an anode. Strategies for looking at this process do not have a direct measure of ion movement as it occurs, and thus do not provide essential mechanistic details for …
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Scanning electrochemical microscopy with conducting polymer probes: Validation and applications
Scanning electrochemical microscopy (SECM) is a useful technique for exploring redox and ionic processes on active materials. Here we explore how conducting polymers (CPs) offer several advantages as probe electrode material, given its versatility in the measurement of redox and ionic processes, …
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Characterization of catalytically active solid liquid interfaces by scanning electrochemical microscopy (SECM)
Die elektrochemische Rastermikroskopie wurde genutzt zur quantitativen Untersuchung von Biosensorkomponenten. Der Feedback Modus wurde eingesetzt, um Titannitrid Dünnschichtelektroden auf ihre mögliche Eignung als Elektrodenmaterial zu untersuchen. Es wurde nachgewiesen, dass eine vergrößerte …
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Flexible microelectrode probes for scanning electrochemical microscopy – from concept to high-throughput applications
Weiche lineare Arrays aus acht individuell adressierbaren C, Au oder Ag Mikroelektroden wurden als neue Elektrochemische Rastersondenmikroskop (SECM)-Sonden entwickelt um ein Hochdurchsatz-Abrastern und -Modifizieren flacher, gekippter und gebogener Oberflächen durchzuführen. Die Arrays wurden auf …
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Dye regeneration kinetics in dye sensitized solar cells studied by scanning electrochemical microscopy
In dieser Dissertation wird eine Reihe von Experimenten vorgestellt, die sich mit lokalen Messungen der Farbstoffregenrationskinetik befassen. Die Reduktion der intermediär gebildeten photooxidierten Farbstoffmoleküle durch Iodidiionen aus der Lösung wurde mit Hilfe eines elektrochemischen …
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Coupling Raman spectroscopy and scanning electrochemical microscopy for spectroelectrochemical analysis of electrode interfaces
… causes variation 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 …
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Revealing ion transfer kinetics and charge dynamics at operating battery materials through scanning electrochemical microscopy
… in real batteries. Among emerging surface tools, scanning electrochemical microscopy (SECM) provides broad opportunity for understanding interphase formation and evolution, measuring single particles, and mapping electrode function. This work presents the development of multiple electroanalytical …
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Electrochemical investigation of platinum nanoparticles supported on carbon nanotubes as cathode electrocatalysts for direct methanol fuel cell
… nanotubes. To add to the already mentioned, Scanning electrochemical microscopy (SEM), proton induced x-ray emission (PIXE), scanning electrochemical microscopy (SECM) and Brunauer-Emmett Tellar (BET) were also used.
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Probing structure-function relationships at catalytic surfaces with emerging electroanalytical tools
… techniques based on spectroscopy, scanned probe microscopy, and electrochemistry have been developed to detect surface intermediates. These techniques have been used to chemically identify surface intermediates of many reactions and have played a role in understanding reactivity at well-defined …
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Single layer graphene as a stable and transparent electrode for the measurement of non-aqueous electrogenerated chemiluminescence and charge transfer inverse photoemission
… electrode material for use in coupled electrochemical and spectroscopic experiments in non-aqueous media through electrogenerated chemiluminescence (ECL). SLG was used with classical ECL luminophores, rubrene, tris(2,2′-bypyridine)-ruthenium(II) and 9,10-diphenylanthracene in an inert …
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Dynamic measurement and control of electrochemical interfaces for energy storage and conversion
… it. Chapters 2 and 3 outline methods for using scanning electrochemical microscopy to measure surface reactivity on carbon electrodes for water oxidation and flow batteries. Chapters 4 and 5 explore responsive organic materials for programmable deconstruction at the electrode interface for use …
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Novel approaches to engineer glucose biosensors
… the sensor by dip coating during polymerisation. Electrochemical measurements revealed that the response characteristics of sensors coated with this membrane are highly consistent. Scanning Electrochemical Microscopy (SECM) was used to spatially resolve glucose diffusion through the membrane by …
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Photoelectrochemical imaging of gold nanoparticles by light-activated electrochemistry
… locations. Herein, LAE was expanded to an electrochemical imaging technique. In the original work published for LAE and the follow-up studies, the Si electrode was modified and investigated with redox species, such as ferrocene or anthraquinone, attached to a monolayer modified electrode, …
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Development of a functionalized coating for inhibition of marine corrosion and biofouling.
… vegetative cells were seen after fluorescence microscopy to be distributed throughout the coating. Laboratory electrochemical impedance tests were used to characterize the corrosion behaviour of the endospore-containing (biotic) sol-gel coating in comparison to an abiotic (no endospores) …
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Mercury Amalgam Electrodeposition on Metal Microelectrodes
… possess certain advantageous properties for scanning electrochemical microscopy (SECM) and electroanalysis. But as applications require more and more precision, fundamental questions concerning the exact shape and constitution of the amalgam can become important for interpreting SECM …
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Probing the electrochemical dynamics of soluble redox active polymers
… exhibit properties that make amenable their electrochemical exploration as solution-phase redox couples. A main finding is that RAP solutions store energy efficiently and reversibly while offering chemical modularity and size versatility. Beyond the practicality toward their use in NRFBs, the …
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Examining the Effects of Applied Potential on the Surface Charge of Functionalized Monolayers for Site-Directed Ionic Self Assembly
… in electron transfer that can be monitored with electrochemical impedance measurements. Impedance measurements provide a qualitative assessment of the degree of potential-driven polyelectrolyte self assembly. The electrostatic interactions between the redox probe in solution and the terminal …
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