Dissertations / Theses on the topic 'Electrochemical analysis'
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Sobocinski, Raymond Louis. "Electrochemical and Raman spectroscopic investigations of in situ and emersed silver-alcohol electrochemical interfaces." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185476.
Full textSong, Peng. "Microengineered electrochemical reactors." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709449.
Full textAlvarez, de Eulate Diaz de San Martin Eva Maria. "Electrochemical studies toward proteomic analysis." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/702.
Full textParrilla, Pons Marc. "New Electrochemical Sensors for Decentralized Analysis." Doctoral thesis, Universitat Rovira i Virgili, 2016. http://hdl.handle.net/10803/396297.
Full textNuevos sensores electroquímicos para analisis decentralizados es una tesis que enmarca diferentes aspectos del desarrollo de sensores potenciométricos, desde su fabricación, el diseño adecuado, i finalmente, su aplicabilidad en escenarios reales. En el contexto actual, la evolución de la tecnología, especialmente la aparición a nivel global de internet, y la disponibilidad de esta a bajo coste han permitido la creación de herramientas que nos permiten conectar el mundo físico y, en el caso de esta tesis, el mundo químico a la red. Esta conexión aporta un nuevo grado dentro la escala de valor para la sociedad actual. Concretamente, esta aportación tecnológica va dirigida a superar los nuevos retos de la actualidad, como pueden ser la sostenibilidad del sistema sanitario a causa del envejecimiento de la poblacion, el control medioambiental, así como también mantener la seguridad para la sociedad del bienestar del futuro. Entonces, esta tesis presenta soluciones efectivas para el desarrollo de herramientas de captación de información que servirán para nutrir a la sociedad de un mayor conocimiento. Por consiguiente, produciendo nuevos negocios alrededor, de la fabricación, procesado i creación de valor en los datos obtenidos. La investigación y desarrollo de sensores potenciométricos integrados en la ropa para detectar los niveles de electrolitos y sensores simples en papel para la determinación de biomoléculas, como la glucosa, son algunos de los objetivos conseguidos en esta tesis. Además, sensores integrados en globos permiten el estudio de sus propiedades mecánicas y electroquímicas, así como, aportando nuevas soluciones a problemas reales. Todas estas aplicaciones sirven de portales de captación de información química hacia la integración dentro de la nueva sociedad de la información.
ew Electrochemical Sensors for Decentralized Analysis is a thesis that wisely discuss the developments of potentiometric sensors, from the fabrication step, the use of a suitable design, to the applicability in real scenarios. Nowadays, the evolution of technology, specially the creation of the global internet network, and the low-cost availability of such technology have allowed the development of tools that connect the physical world and, addressed in this thesis, the chemical world into the network. This connection adds a new level in the value chain for the present society. Precisely, this technology approach is focus on circumvent new present challenges of society. For instance, sustainability of the healthcare system caused by the population aging, environmental monitoring, as well as, keep security and safety to the welfare of society of the future. Therefore, this thesis presents successful solutions for the development of tools to gather chemical information. This information will nurture society with high-value knowledge. Accordingly, new business development from, sensing products, data treatment and information management are going to be created. Research and development of potentiometric sensors integrated into garments for electrolyte detection and simple sensors built in paper for biomolecules determination, such as glucose, and liquid monitoring, such as sweat, are some of the accomplished objectives from this thesis. Furthermore, balloon-embedded sensors allow the study of the mechanical and electrochemical properties of the electrodes, as well as, contributing with new solutions to real problems. All the applications developed in this thesis are utilized as gateways for chemical information acquisition towards the integration into the new information society.
Chu, Kevin Taylor. "Asymptotic analysis of extreme electrochemical transport." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33669.
Full textIncludes bibliographical references (p. 237-244).
In the study of electrochemical transport processes, experimental exploration currently outpaces theoretical understanding of new phenomena. Classical electrochemical transport theory is not equipped to explain the behavior of electrochemical systems in the extreme operating conditions required by modern devices. In this thesis, we extend the classical theory to examine the response of two electrochemical systems that form the basis for novel electrochemical devices. We first examine the DC response of an electrochemical thin film, such as the separator in a micro-battery, driven by current applied through reactive electrodes. The model system consists of a binary electrolyte between parallel-plate electrodes, each possessing a compact Stern layer which mediates Faradaic reactions with Butler-Volmer kinetics. Our analysis differs from previous studies in two significant ways. First, we impose the full nonlinear, reactive boundary conditions appropriate for electrolytic/galvanic cells.
(cont.) Since surface effects become important for physically small systems, the use of reactive boundary conditions is critical in order to gain insight into the behavior of actual electrochemical thin films that are sandwiched between reactive electrodes, especially at high current densities. For instance, our analysis shows that reaction rate constants and the Stern-layer capacitance have a strong influence on the response of the thin film. Second, we analyze the system at high current densities (far beyond the classical diffusion-limited current) which may be important for high power-density applications. At high currents, we obtain previously unknown characterizations of two interesting features at the cathode end of the cell: (i) a nested boundary layer structure and (ii) an extended space charge region. Next, we study the response of a metal (i.e., polarizable) colloid sphere in an electrolyte solution over a range of applied electric fields.
(cont.) This problem, which underlies novel electrokinetically driven microfluidic devices, has traditionally been analyzed using circuit models which neglect bulk concentration variations that arise due to double layer charging. Our analysis, in contrast, is based on the Nernst-Planck equations which explicitly allow for bulk concentration gradients. A key feature of our analysis is the use of surface conservation laws to provide effective boundary conditions that couple the double layer charging dynamics, surface transport processes, and bulk transport processes. The formulation and derivation of these surface conservation laws via boundary layer analysis is one of the main contributions of this thesis. For steady applied fields, our analysis shows that bulk concentrations gradients become significant at high applied fields and affect both bulk and double layer transport processes. We also find that surface transport becomes important for strong applied fields as a result of enhanced absorption of ions by the double layer.
(cont.) Unlike existing theoretical studies which focus on weak applied fields (so that both of these effects remain weak), we explore the response of the system to strong applied fields where both bulk concentration gradients and surface transport contribute at leading order. For the unsteady problem at applied fields that are not too strong, we find that diffusion processes, which are necessary for the system to relax to steady-state, are suppressed at leading-order but appear as higher-order corrections. This result is derived in a novel way using time-dependent matched asymptotic analysis. Unfortunately, the dynamic response of the system to large applied fields seems to introduce several complications that make the analysis (both mathematical and numerical) quite challenging; the resolution of these challenges is left for future work. Both of these problems require the use of novel techniques of asymptotic analysis (e.g., multiple parameter asymptotic expansions, surface conservation laws, and time-dependent asymptotic matching) and advanced numerical methods (e.g., pseudospectral methods, Newton-Kantorovich method, and direct matrix calculation of Jacobians) which may be applicable elsewhere.
by Kevin Taylor Chu.
Ph.D.
Ding, Wenwu Carleton University Dissertation Chemistry. "Electrochemical hydride generation for ultratrace analysis." Ottawa, 1995.
Find full textD'Arcy, Karen Ann. "Electrochemical methods for speciation of inorganic arsenic." PDXScholar, 1986. https://pdxscholar.library.pdx.edu/open_access_etds/524.
Full textWengenack, Nancy L. "Design and testing of a computer-controlled square wave voltammetry instrument /." Online version of thesis, 1987. http://hdl.handle.net/1850/8853.
Full textJagannathan, Sudhakar. "Process, structure and electrochemical." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29713.
Full textCommittee Chair: Kumar, Satish; Committee Member: Cook, Fred L.; Committee Member: Bottomley, Lawrence A.; Committee Member: Carter, William Brent; Committee Member: Yushin, Gleb. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Ismail, Iqbal M. I. "Electrochemical studies of polymer electrolytes." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242319.
Full textLarsson, Mariann. "Electrochemical analysis of Zinc for biodegradable applications." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121526.
Full textFör att undvika kostsamma och riskfyllda sekundära ingrepp är nedbrytbaraimplantat intressanta. Dessa designas för att för att kontrolleratbrytas ned och tas omhand av kroppens egna mekanismer. Den storautmaningen är att hitta material som bryts ner på ett ofarligt och förutsägbartsätt, i termer av hastighet, restprodukter och biokompatibilitet. Denna studie fokuserade på korrosionsförloppet hos zink, vilket en tidigarestudie visat vara en lämplig kandidat för denna sorts analys. Zinkprovernasegenskaper observerades med elektrokemiska metoder medan provernavar nedsänkta i/täckta av fosfatbuffrad saltlösning (PBS), Ringerlösningsamt mänskligt blod. Svepelektronmikroskopi (SEM), svenska ord för(EDX) var två metoder som användes för att undersöka strukturen ochsammansättningen av korrosionsprodukterna. Det visade sig att korrosionsmekanismenvar olika i de tre olika studerade elektrolyterna. Prover som var täckta av Ringerlösning visade homogen korrosionmed en initial korrosionshastighet på 0.1 mm/år - 0.5 mm/år. Resultatfrån den elektrokemiska impendansspektroskopin pekar mot att korrosionsprodukternaefter 12-24 h motsvarar ett två-lagers gränssnitt somkan tolkas som ett initialt (0-12 h) bildat yttre diffusionskontrolleratlager, följt av ett homogent lager som bildas mellan metallen och detinitiala lagret. EDX och SEM visar att korrosionsprodukterna till mestadelsbestår av zinkkarbonater. Dessa observationer är även styrkta avFTIR. Zinkproverna som utsattes för PBS uppvisade fläckvis korrosion,med dendrit-liknande strukturer som växte ut ur underlaget under provtiden.Initial korrosionshastighet uppmättes mellan 6 och 22 μm/år.Resultaten från EIS påvisar en elektrokemisk modell motsvarande ettenkelt oxidlager, som täcker hela den yta som exponeras för lösningen.Korrosionsprodukterna bestod huvudsakligen av zinkfosfater (FTIR, EDX).Slutligen användes människoblod i en omgång av experiment. Härkorroderade proverna initialt med en hastighet på 0.08-0.38 mm/år.Korrosionen var homogen, likt proverna som utsattes för Ringerlösning.Den elektrokemiska modellen (fastställd med EIS) överensstämde dockmed den som fanns i PBS-resultaten, med ett enkelt lager av korrosionsprodukteröver hela ytan.
Zheng, Feng. "Advanced electrochemical analysis for complex electrode applications." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288481.
Full textRusinek, Cory A. "New Avenues in Electrochemical Systems and Analysis." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490350904669695.
Full textRohanifar, Ahmad. "Conductive Polymers for Electrochemical Analysis and Extraction." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544809010837595.
Full textCosgrove, Martin. "Electrochemical approaches to hydrogen peroxide monitoring." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238189.
Full text彭紹光 and Siu-kwong Pang. "Electrochemical reduction of oxygen in the presence of methanol." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31213558.
Full textPang, Siu-kwong. "Electrochemical reduction of oxygen in the presence of methanol /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17545705.
Full textCastañeda, Briones María Teresa. "Electrochemical stripping analysis and nanoparticles for affinity biosensors." Doctoral thesis, Universitat Autònoma de Barcelona, 2008. http://hdl.handle.net/10803/3277.
Full textComparando el Bi(NO3)3-GECE con el electrodo de película de mercurio comúnmente usado y electrodo de película de bismuto desarrollado antes por nuestro grupo, el nuevo electrodo propuesto ofrece un notable funcionamiento en el análisis de metales pesados en cantidades traza, que puede ser de gran ventaja en electroquímica, contribuyendo a una aplicabilidad más amplia de técnicas electroquímicas por redisolución relacionadas con electrodos "sin mercurio". Además de aplicaciones ambientales el electrodo desarrollado basado en bismuto tendría interés especial para la aplicación en la detección de puntos cuánticos (QDs) basados en metales pesados. Tales aplicaciones están actualmente en proceso de estudio en nuestro grupo de investigación para la detección de ADN.
Las otras partes de la tesis se dedican al desarrollo de nuevos sensores de ADN y proteínas basados en la misma técnica electroquímica de redisolución y el uso de nanopartículas de oro como marcas.
Actualmente la detección electroquímica de secuencias de ADN específicas vía el evento de hibridación es una cuestión importante por lo cual diversas estrategias han sido propuestas.
Genosensores electroquímicos de afinidad basados en el marcaje con nanopartículas de oro (AuNPs) y el uso de partículas paramagnéticas (MB) como plataforma para la inmovilización de la sonda de ADN de captura también han sido desarrollados en esta tesis a fin de demostrar la inducción magnética eficaz de un nuevo electrodo de grafito-epoxi composite-magnético (M-GECE) el cual fue construido también con pasta de grafito-epoxi composite con un pequeño imán de neodimio integrado.Todos los ensayos para la detección electroquímica de la hibridación del ADN desarrollados en esta tesis fueron basados en la detección directa de las marcas de AuNPs por medio de la técnica de voltametría de pulso diferencial (DPV) usando el M-GECE donde la intensidad de la corriente de la señal generada es directamente proporcional a la cantidad de ADN en la muestra. Como también ha sido demostrado, con el sensor de ADN asistido magnéticamente, el ADN analito condujo a una muy bien definida señal mientras que esencialmente ninguna señal fue observada para el ADN no complementario.
Un nuevo inmunoensayo electroquímico sensible ha sido desarrollado, también basado en AuNPs como marca y MB como plataforma. El método fue evaluado para un inmunoensayo heterogéneo no competitivo de una IgG humana como proteína modelo. La detección electroquímica fue llevada a cabo en la misma forma que lo fue para ADN.
La detección electroquímica de marcas de AuNPs en biosensores de afinidad usando métodos de redisolución permite el estudio detallado de la hibridación de ADN así como también inmuno-reacciones con interés en aplicaciones relacionadas con genosensores o inmunosensores. Los métodos electroquímicos usados para la detección de AuNPs como marca pueden ser muy prometedores tomando en cuenta su sensibilidad alta, límite de detección bajo, selectividad, simplicidad, bajo coste, y disponibilidad de instrumentos portátiles.
Como conclusión final, las estrategias de análisis electroquímico de ADN y proteínas fueron demostradas con éxito y debido a los resultados prometedores su uso en muestras reales es viable. Tales biosensores de ADN e inmunosensores dan lugar a un enorme potencial de aplicación principalmente para diagnóstico clínico y monitoreo ambiental entre otros campos.
In the first part of this thesis a new graphite-epoxy composite electrode containing bismuth nitrate [Bi(NO3)3-GECE)], as built-in bismuth precursor as a possible alternative for electrochemical stripping analysis of trace heavy metals has been developed. Individual and simultaneous measurements of Pb and Cd were carried out and the results clearly showed the advantages of the Bi(NO3)3-GECE in combination with square wave anodic stripping voltammetry (SWASV) technique for heavy metals detection. Fast and effective analyses of trace metal ions such as Pb and Cd among others in environmental samples of soil, natural waters and effluents can be carried out by using the new Bi(NO3)3-GECE constructed. The inherent advantage of no necessity of mercury removes many of the objections for the use of the developed sensor.
When comparing the Bi(NO3)3-GECE with the commonly used mercury film electrode and previously developed bismuth film electrode, the newly proposed electrode offers a remarkable performance in analysis of trace heavy metals, which can be advantageous in electrochemical, hence contributing to the wider applicability of electrochemical stripping techniques in connection with "mercury-free" electrodes. Beside environmental applications the developed bismuth based electrode would have special interest for application to heavy metal based quantum dots. Such applications are currently in the studying process at our research group for DNA detection.
The other parts of the thesis are dedicated to the application of electrochemical stripping analysis in connection to gold nanoparticles for DNA and protein detection.
Currently the electrochemical detection of specific DNA sequences via hybridization event is an important issue by which diverse strategies have been proposed. Affinity electrochemical genosensors based on labelling with gold nanoparticles (AuNPs) and the use of paramagnetic beads (MB) as platform for the immobilization of capture DNA probe have been also developed in this thesis in order to demonstrate the effective magnetic triggering of a new magnetic-graphite epoxy composite electrode (M-GECE) which was constructed with graphite-epoxy composite paste, with a small neodymium magnet integrated.
All the assays for the DNA hybridization electrochemical detection developed in this thesis were based on the direct detection of AuNPs labels (anchored onto the M-GECE) by means of differential pulse voltammetry (DPV). The intensity of the generated current is directly proportional to the amount of DNA at the sample. As also has been demonstrated, with this magnetically assisted DNA sensor, target DNA leaded to very well defined signal whereas essentially no signal was observed for non-complementary DNA.
By the other side a novel, sensitive electrochemical immunoassay has been also developed based in AuNPs as label and MB as platform. The method was studied and evaluated for a noncompetitive heterogeneous immunoassay of a human IgG as a model protein. The electrochemical detection was carried out in the same way that as for DNA.
The electrochemical detection of AuNPs labels in affinity biosensors using stripping methods allows the detailed study of DNA hybridization as well as immunoreactions with interest in genosensor or immunosensor applications. The developed detection methodologies may be very promising taking into account their high sensitivity, low detection limit, selectivity, simplicity, low cost, and availability of portable instruments.
As final conclusion, the DNA and protein electrochemical analysis strategies were successfully demonstrated and according to the promising results obtained its use for real samples is viable. Such DNA biosensors and immunosensors hold an enormous application potential principally for clinical diagnostic and environmental monitoring among other fields.
Delcourt-Lancon, Alice. "Electrochemical analysis supported by macro and microelectrode array." Thesis, Durham University, 2011. http://etheses.dur.ac.uk/3570/.
Full textBagley, Gillian. "The measurement and the analysis of electrochemical noise." Thesis, University of Manchester, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488277.
Full textScullion, Stanley Paul. "Amperometric monitoring of nitrate and phosphate." Thesis, Loughborough University, 1989. https://dspace.lboro.ac.uk/2134/26816.
Full textLimson, Janice Leigh. "Electrochemical studies of metal-ligand interactions and of metal binding proteins." Thesis, Rhodes University, 1999. http://hdl.handle.net/10962/d1018239.
Full textZhang, Li Qun. "Square-wave voltammetric stripping detection for flow injection analysis and chromatography." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/26024.
Full textShi, Kang. "Electrochemical pretreatment of carbon electrodes and the electroanalytical applications." HKBU Institutional Repository, 2000. http://repository.hkbu.edu.hk/etd_ra/271.
Full textWitting, Paul Kenneth. "Chemical, electrochemical and spectroelectrochemical behaviour of polycyclic nitroaromatics." Thesis, The University of Sydney, 1993. https://hdl.handle.net/2123/26629.
Full textNolan, Melissa A. "Microfabricated iridium arrays : failure mechanisms, investigation of the Hg-Ir interface and their use in Cu or Hg determination /." Thesis, Connect to Dissertations & Theses @ Tufts University, 1999.
Find full textAdviser: Samuel P. Kaunaves. Submitted to the Dept. of Chemistry. Includes bibliographical references (leaves 190). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
Chahin, Nassif. "Multiplexed detection of SNPs using electrochemical melting curve analysis." Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/670966.
Full textEl objetivo general de esta tesis doctoral es desarrollar plataformas de geno-sensores de bajo costo para la detección múltiple de polimorfismos de un solo nucleótido. La determinación de polimorfismos de un solo nucleótido (SNP) es de gran importancia en las ciencias de la vida, teniendo aplicación en la medicina personalizada, estratificación de pacientes, forense, además de brindar información sobre la predisposición a la enfermedad. En la actualidad, los métodos basados en la electroquímica se revelan como alternativas atractivas a las técnicas más utilizadas para determinar el punto de fusión del ADN, debido a su alta sensibilidad, simplicidad, rentabilidad y compatibilidad con la microfabricación. La primera plataforma se basó en una reacción de extensión de cebadores electroquímicos, donde los polioximetalatos activos redox de Keggin y Dawson se utilizaron para modificar didesoxinucleótidos a través de la formación de enlaces amida. La segunda plataforma se basa en la detección de polimorfismos de un solo nucleótido mediante el análisis electroquímico de la curva de desnaturalización. El enfoque se basa en el análisis de la curva de desnaturalización en fase sólida que utiliza sondas inmovilizadas en electrodos de oro. Se desarrolló un prototipo de dispositivo capaz de detectar un ADN diana que porta un SNP relacionado con la miocardiopatía con una sola base en la diferencia. Finalmente, este dispositivo se aplicó a la detección de SNP en muestras de sangre reales. La diana de secuencia de SNP relacionada con la osteoporosis se extrajo de un pinchazo en el dedo y se amplificó usando PCR asimétrica. Además, se optimizaron las condiciones de amplificación para obtener el mejor rendimiento del producto y se definió el SNP de una muestra de sangre.
The overall objective of this PhD thesis is to develop low cost geno-sensor platforms for multiplexed detection of single nucleotide polymorphism. The determination of single nucleotide polymorphisms (SNP) is of great importance in life sciences, having application in personalised medicine, patient stratification, forensics, as well as providing information regarding predisposition to disease. Nowadays electrochemistry-based methods are revealed as attractive alternatives to the most commonly used techniques for determining DNA melting point, because of their high sensitivity, simplicity, cost-effective and compatibility with microfabrication. The first platform was based on an electrochemical primer extension reaction, where the redox active Keggin and Dawson polyoxymetalates were used to modify dideoxynucleotides through amide bond formation. The second platform is based on the detection of single nucleotide polymorphisms using electrochemical melting curve analysis. The approach is based on solid phase melting curve analysis that exploits probes immobilised on gold electrodes. We developed a home-made electrochemical melting curve analysis device, able to detect a DNA target that carries a SNP related to cardiomyopathy from others with only one base in difference. Finally, this device was applied to SNPs detection in real blood samples. Osteoporosis related SNP sequence target was extracted from a finger prick and amplified using asymmetric Recombinase Polymerase Amplification. Also, the amplification conditions were optimised for best product yield, and the SNP from a blood sample was defined.
Mochizuki, Manabu. "Electrochemical and spectroscopic analysis on the oxidation of catechins." Kyoto University, 2005. http://hdl.handle.net/2433/145449.
Full text0048
新制・課程博士
博士(農学)
甲第11239号
農博第1454号
新制||農||902(附属図書館)
学位論文||H17||N3984(農学部図書室)
22848
UT51-2004-U444
京都大学大学院農学研究科応用生命科学専攻
(主査)教授 池田 篤治, 教授 關谷 次郎, 教授 大東 肇
学位規則第4条第1項該当
El-Shahawi, M. S. E. "Spectroscopic and electrochemical studies of some transition metal complexes." Thesis, University of Strathclyde, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381143.
Full textTreeman, Nicole M. "Electrochemical study of corrosion phenomena in zirconium alloys." Thesis, Cambridge, Massachusetts, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/10945/37785.
Full textShadow corrosion of zirconium alloy fuel cladding in BWR environments, the phenomenon in which accelerated corrosion is experienced when the cladding surface is in close proximity to other metals, has become a potential life-limiting issue for BWR fuel. Recent results from experimentation at MIT, Halden and Studvik suggest that a galvanic coupling drives the phenomenon between the cladding and the adjacent material. However, the actual processes involved are not understood. One key parameter that would help in the understanding of the phenonenon would be a measurement of the actual corrosion current between fuel cladding and adjacent materials in the actual in-reactor environment. The limitations placed on the burn-up of uranium oxide fuel corelates to the amount of corrosion seen through a directly measurable oxide thickness on the waterside of the zirconium alloy cladding. This oxide corrosion product directly correlates to distance from structure components, leading the effect commonly referred to as shadow corrosion. In recent experiments, Studvik determined that there are large ECP differences associated with Inconel and zirconium alloys that correlate to increased galvanic current density when the materials are coupled. In this thesis research, four electrode pairs wre used to measure galvanic cirrent densities in the irradiation environment:Pt-Pt, Zircalloy (Zr-2), Inconel (X-750)-Pt, and Zr-2-X-750. To determine the changes in the coolant water conductivity dus to the presence of radiolysis products, electrochemical potential mesurements of Pt-Pt coupled electrodes were analyzed. Finally, attempts to characterize the observed oxide behavior using measurement from Electrochemical Impedance Spectroscopy (EIS), also known as Alternating Current Impedance, were conducted. Through the measurements taken, analysis of the mechanisms potentially causing the shadow corrosion phenomenon was conducted. The results of the observations included: Measurement of increased conductivity of coolant water correlating to increases in reactor power, measurement of increased galvanic current measurements correlating to increases in reactor power.
Billing, Caren. "The determination of trace elements in complex matrices by electrochemical techniques." Pretoria : [s.n.], 2000. http://upetd.up.ac.za/thesis/available/etd-03272006-114615/.
Full textWatson, Charles Martin. "Surface Interactions of Mercury on Gold Foil Electrodes in Electrodeposition and Stripping and ; An Investigation of Free Thiolate Ions from Metal-Thiolate Chalcogenides." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/WatsonCM2003.pdf.
Full textLee, Young Mi. "Development of combined scanning electrochemical optical microscopy with shear force feedback using a tuning fork and current feedback." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3037516.
Full textHadjichari, Andrew Michael, University of Western Sydney, and School of Civic Engineering and Environment. "Determination of heavy metals on macro- and micro-electrodes by adsorptive cathodic stripping voltammetry and anodic stripping voltammetry." THESIS_XXXX_CEE_Hadjichari_A.xml, 1999. http://handle.uws.edu.au:8081/1959.7/602.
Full textDoctor of Philosophy (PhD)
Scott, Timothy Anthony 1963. "Determining the extent of specific adsorption at a solid metal electrode utilizing differential capacitance measurements." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277097.
Full textSushko, O. A., and О. М. Bilash. "Use of semiconductor nanomaterials for polycyclic aromatic hydrocarbons detection in water object." Thesis, B. Verkin Institute of Low Temperature Physics and Engineering, NASU, 2013. http://openarchive.nure.ua/handle/document/8874.
Full textSong, Fayi. "Studies on the preparation and electroanalytical applications of chemically modified electrodes." HKBU Institutional Repository, 2000. http://repository.hkbu.edu.hk/etd_ra/268.
Full textGuymon, Clint. "MPSA effects on copper electrodeposition : understanding molecular behavior at the electrochemical interface /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1112.pdf.
Full textPayne, Robert R. U. Tatarchuk Bruce J. "Electrochemical characterization and modelling of fuel cells via AC impedance and residence time distribution." Auburn, Ala., 2008. http://hdl.handle.net/10415/1420.
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