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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 57 for “"Gold electrodes"”.
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A study of the anodic oxidation of acetylene on gold electrodes
… for the anodic oxidation of acetylene on gold electrodes in aqueous solutions. It is known that anodic oxidation of organic compounds on gold electrodes produces a large number of organic intermediates and end products. Therefore, it appeared worthwhile to establish a mechanism that could …
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The Structure and Activity of Admetal-Modified Single Crystal Platinum and Gold Electrodes
Platinum and gold single crystal electrodes were decorated by noble metal islands (Ru, Os or Pt) by the spontaneous deposition procedure. These surfaces were characterized by scanning tunneling microscopy (STM) and electrochemical methods to develop fundamental structure-activity relationships …
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Assembly of Conductive Colloidal Gold Electrodes on Flexible Polymeric Substrates using Solution-Based Methods
… describes the techniques of assembling colloidal gold on flexible polymeric substrates from solution. The process takes advantage of the strong affinity of gold to thiol and amino groups. Polymeric substrates were modified with silanes having these functional groups prior to Au attachment or in …
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Characterisation of electrode microarrays produced photolithographically and with thiol self-assembled monolayers on gold electrodes
… of the diffusion layer, showing that such electrodes have significant quantitative effects and qualitative advantages. The great advantage of microelectrodes over macroelectrodes is the minimisation of interference, which gives rise to much lower detection limits. Microelectrodes have much …
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Fabrication of Chemically Modified Nanometer-sized Gold Electrodes and Their Application in Electrocatalysis at Pt Nanoparticles.
… at a high rate at the surface of Pt than at Au electrodes. Using cyclic voltammetry, chemically modified nanometer-sized Au electrodes, prepared by the Laser-Assisted Puller Method, were employed to examine current amplification by electrocalysis at Pt nanoparticles adsorbed on the modified Au …
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Influence Of Applied Potential And Metal Ion Concentraion On Metal Electrodeposition At Micron Gap Gold Electrodes
… involves metal deposition on one set of electrodes (E1), where the metal grows and becomes connected to a second set of electrodes (E2) of an Au interdigitated array of electrodes with a 5 µm separation. However, when different metals were deposited, they deposited in different fashions. …
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Tetrasulphonated phthalocyanine thin films deposited on gold electrodes : a study using voltammetry and synchrotron micro X-ray fluorescence
Het doel van dit werk was de studie van de modificatie van goudelektroden met kobalt(II)tetrasulfoftalocyanine (CoTSPc) en 3,4’,4’’,4’’’ koper(II)-tetrasulfoftalocyanine in een pH 12 bufferoplossing. Een beter begrip van de karakteristieken van de ftalocyaninelagen op de elektrode maakt immers de …
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Development and application electrochemical and spectrophotometric methods based upon AC potential modulation for characterization of hybrid bilayer membranes and electroactive self -assembled monolayers supported on gold electrodes
… via short alkanethiols (C5, C7, C 10) to a gold electrode. The semilog plot of standard rate constant vs. the number of methylene units remains linear down to the shortest used chain length (C5).
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Stripping Voltammetry of Tellurium (IV) In 0.1M HC10 4 at Rotating Gold Disk Electrodes.
… of Tellurium (IV) in 0.1M HC10, using gold electrodes is described. Detection limits for solid gold, in situ gold-plated and externally gold-plated rotating glassy carbon disk electrodes are presented. No significant increase in sensitivity is reported for the use of solid gold. …
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Affordable technologies for point-of-care diagnostics
… monitoring in low- resource settings (LRS). Gold-standard laboratory tests require expensive benchtop equipment, which limits their widespread use. In this work, I developed low-cost technologies for the transduction of two independent types of biosensors. In the first part of my work, I …
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Computers for chemistry and chemistry for computers: From computational prediction of reaction selectivities to novel molecular wires for electrical devices
… as well as new direct ways to connect them to gold electrodes. At the beginning, the first successful single molecule conductance measurements ever on partially antiaromatic molecular wires are described. These wires, based on a biphenylene backbone, were synthesized via a highly regioselective …
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Theory of electron transport through single molecules
… of two terminal nanojunctions: one dealing with gold electrodes which form gold|molecule|gold structures and the other has carbon nanotube (CNT) electrodes forming CNT|molecule|CNT junctions. The theoretical tools employed are firstly, density functional theory (DFT). Chapter 2 presents an …
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Design, Fabrication, and Characterization of an Electrostatically Actuated Microfluidic Valve
… Concept I presents an attempt at inlaying gold electrodes into polydimethylsiloxane substrates. Concept II attempts to use liquid silver injected into channels as electrode materials. Concept III uses aluminum sputtering to fabricate valve electrodes. Each device encountered complications …
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Three-Dimensional Microelectrode Array for Recording Dissociated Neuronal Cultures
… the walls of these electrode layers lie exposed gold electrodes which permit recording and stimulation of the neuronal electrical activity. Silicone elastomer microfluidic layers provide an artificial vasculature for nutrient supply and aeration, as well as permit the loading of dissociated …
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Study of thin metal films and oxide materials for nanoelectronics applications
… their potential application in nanoelectronics: gold and copper films, nickel nanoelectrodes, oxide nanograin superconductors, carboxyl ferromagnetic microspheres and graphene oxide flakes. The crystallization and surface morphology of gold and copper films on SiO2/Si substrates is investigated …
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Methods for the development of a DNA based nanoelectronics
… The site-specific attachment of nanoobjects (gold colloids) at the center of DNA junctions. (iii) The integration of DNA into microstructured gold electrode arrays, in particular the stretching of single DNA molecules between two electrodes. For this a simple, but reliable methods for the …
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Nanotexturisation of gold surfaces and its application to neural implants
… the improvement of the interface properties of gold electrodes for neural implants. The goal was to increase the surface area without a change in geometrical footprint of the electrode with nano-fabrication tools. A process has been created that uses Nanosphere Lithography for masking layer …
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Optimization of Electrode Configurations for Calibration-Free, Remote Sensing of Heavy Metals in Water Using Double-Potenital Step Anodic Coulometry
… and motivate this work. We are targeting electrodes that can be inkjet printed directly onto a 3D-printed polymer electrochemical cell, simplifying the manufacturing processes and substantially decreasing the costs of the device. We began by investigating the impact of a membrane …
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Function of multicopper oxidases adsorbed on gold nanoparticles /
… functions of multicopper oxidases adsorbed on gold nanoparticles are studied. As multicopper oxidases, laccases and human ceruloplasmin are used. The enzymes have been employed in electrochemical systems consisting of gold electrodes covered by gold nanoparticles and enzymes. For the first time …
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Development of Novel Collection and Biosensor Detection System for Microbial Organisms
… for a particular bacteria or fungi were bound to gold electrodes. Hybridization of genomic DNA with a specific probe was monitored by changes in impedance. The results demonstrated that impedance increased following hybridization when compared to probe alone or follow incubation with unmatched …
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