Relevant bibliographies by topics / Local electrochemical impedance spectroscopy

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  2. Dissertations / Theses
  3. Books
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Academic literature on the topic 'Local electrochemical impedance spectroscopy'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Local electrochemical impedance spectroscopy"

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Jorcin, Jean-Baptiste, Mark E. Orazem, Nadine Pébère, and Bernard Tribollet. "CPE analysis by local electrochemical impedance spectroscopy." Electrochimica Acta 51, no. 8-9 (January 2006): 1473–79. http://dx.doi.org/10.1016/j.electacta.2005.02.128.

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Lillard, R. S., J. Kruger, W. S. Tait, and P. J. Moran. "Using Local Electrochemical Impedance Spectroscopy to Examine Coating Failure." CORROSION 51, no. 4 (April 1995): 251–59. http://dx.doi.org/10.5006/1.3293590.

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Frateur, Isabelle, Vicky Mei-Wen Huang, Mark E. Orazem, Nadine Pébère, Bernard Tribollet, and Vincent Vivier. "Local electrochemical impedance spectroscopy: Considerations about the cell geometry." Electrochimica Acta 53, no. 25 (October 2008): 7386–95. http://dx.doi.org/10.1016/j.electacta.2008.01.012.

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Gharbi, Oumaïma, Kieu Ngo, Mireille Turmine, and Vincent Vivier. "Local electrochemical impedance spectroscopy: A window into heterogeneous interfaces." Current Opinion in Electrochemistry 20 (April 2020): 1–7. http://dx.doi.org/10.1016/j.coelec.2020.01.012.

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Huang, Nai Bao, Wan Li, Cheng Hao Liang, Li Shuang Xu, Xiao Ye Wang, Tian Hang Sun, and Min Sun. "Using Localized Impedance Spectroscopy to Study the Effect of Loading Potential Variation on DMFC Anode Performance." Materials Science Forum 852 (April 2016): 785–91. http://dx.doi.org/10.4028/www.scientific.net/msf.852.785.

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By localized impedance spectroscopy (LEIS) and electrochemical impedance spectroscopy (EIS), the effect of loading potential variation on the performance of direct methanol fuel cell ( DMFC ) anode was studied. During surface scanning, the local impedance of the anode showed sawtooth-like distribution under potential loading, which meant the electrochemical activity in the anode surface was nonuniform. Meanwhile, the local impedance tended to increase with loading potential increasing. After loading 16h and 72h at 0.6V, the average size of catalysts changed from 3.4nm to 3.6nm and 4.4nm, increased by 5.88% and 29.41%. After loaded for 72h under 0.8V, the ratio of Pt:Ru in catalyst changes from 2:1 to 3.9:1. It is the change of the difference in local area, which showed impedance increase, catalyst particle size growing up and agglomeration, the loss of Ru, that contributed to the performance decay of DMFC anode.
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Lillard, R. S., P. J. Moran, and H. S. Isaacs. "A Novel Method for Generating Quantitative Local Electrochemical Impedance Spectroscopy." Journal of The Electrochemical Society 139, no. 4 (April 1, 1992): 1007–12. http://dx.doi.org/10.1149/1.2069332.

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Burczyk, Lukasz, and Kazimierz Darowicki. "Local electrochemical impedance spectroscopy in dynamic mode of galvanic coupling." Electrochimica Acta 282 (August 2018): 304–10. http://dx.doi.org/10.1016/j.electacta.2018.05.192.

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Łosiewicz, B., Magdalena Popczyk, Agnieszka Smołka, Magdalena Szklarska, Patrycja Osak, and A. Budniok. "Localized Electrochemical Impedance Spectroscopy for Studying the Corrosion Processes in a Nanoscale." Solid State Phenomena 228 (March 2015): 383–93. http://dx.doi.org/10.4028/www.scientific.net/ssp.228.383.

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This work deals with localized electrochemical impedance spectroscopy (LEIS) which is an improved technique of the commonly used electrochemical impedance spectroscopy (EIS). Thanks to modern structural solutions, the LEIS technique ensures local impedance measurement. Therefore, it is used in the research into point corrosion, such as the pitting corrosion, and in the research into protective coatings or into alloys including alloy steels. This review paper presents the basic theory and the usability of the LEIS based on the literature on the newest research in the field of corrosion.
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Souto, Ricardo M., Juan José Santana, A. G. Marques, and Alda M. Simões. "Local Electrochemical Impedance Spectroscopy Investigation of Corrosion Inhibitor Films on Copper." ECS Transactions 41, no. 25 (December 16, 2019): 227–35. http://dx.doi.org/10.1149/1.3697592.

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Sánchez, M., N. Aouina, D. Rose, P. Rousseau, H. Takenouti, and V. Vivier. "Assessment of the electrochemical microcell geometry by local electrochemical impedance spectroscopy of copper corrosion." Electrochimica Acta 62 (February 2012): 276–81. http://dx.doi.org/10.1016/j.electacta.2011.12.041.

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Dissertations / Theses on the topic "Local electrochemical impedance spectroscopy"

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Assis, Camila Molena de. "Estudo do comportamento de corrosão de ligas de alumínio soldadas por fricção (FSW) utilizando técnicas eletroquímicas globais e locais." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-24022017-134331/.

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A redução de peso é uma questão tecnológica fundamental para a indústria aeroespacial, uma vez que diminui o consumo de combustível, resultando em redução de custos e contribuindo para a redução da emissão de gases de efeito estufa. Devido à relação favorável entre resistência mecânica e peso, as ligas de alumínio de elevada resistência mecânica contribuem favoravelmente para este aspecto. Entretanto, como estas ligas são dificilmente soldáveis pelos processos tradicionais envolvendo fusão, o procedimento de junção utilizado em aeronaves é a rebitagem, resultando em ganho de peso. O processo de soldagem por fricção (friction stir welding -FSW), desenvolvido no início dos anos noventa pelo The Welding Institute (TWI) do Reino Unido, se constituiu em um grande avanço para a soldagem das ligas de alumínio utilizadas na indústria aeroespacial, pois permite a produção de soldas mais confiáveis e virtualmente livres de defeitos. Entretanto, o aquecimento das peças e a deformação mecânica durante a FSW geram zonas com diferentes características microestruturais que, de acordo com a literatura, apresentam resistências à corrosão diferentes. Por oferecerem elevada resolução lateral, as técnicas eletroquímicas locais são úteis para elucidar as diferenças de reatividade local de eletrodos heterogêneos, como no caso de metais soldados. No presente trabalho técnicas eletroquímicas locais foram empregadas para caracterização da resistência à corrosão em meio contendo cloreto das diferentes zonas geradas pela soldagem de topo da liga de alumínio 2024-T3 por FSW, comparando-a com a exibida pelo metal base. O estudo foi complementado com a caracterização microestrutural destas regiões e também por ensaios macroscópicos de corrosão. Os resultados dos procedimentos de caracterização microestrutural confirmaram que a FSW provoca modificações na microestrutura das regiões afetadas pelo processo, principalmente no que concerne à distribuição das nanopartículas precipitadas durante o envelhecimento natural da liga. Por sua vez, os resultados dos ensaios macroscópicos de corrosão e eletroquímicos locais mostraram-se concordantes na determinação da região mais sensível à corrosão, que foi verificada como sendo as zonas termicamente afetada (Heat Affected Zone - HAZ) e termomecanicamente afetada (Thermomechanically Affected Zone - TMAZ) do lado do avanço da ferramenta de soldagem, mostrando também que as regiões afetadas pelo processo de soldagem apresentam resistência à corrosão inferior à do metal base. Através do uso da espectroscopia de impedância eletroquímica local (Local Electrochemical Impedance Spectroscopy - LEIS) foi evidenciado que o acoplamento galvânico entre as diferentes zonas geradas durante o processo de soldagem não desempenha um papel relevante na aceleração do processo corrosivo, o que está em desacordo com os resultados publicados em diversos estudos realizados com esta liga soldada por FSW. O trabalho apresenta ainda uma contribuição teórica original demonstrando que medidas de ângulo de contato e de espectroscopia de impedância eletroquímica em uma gota séssil podem ser usadas simultaneamente para a determinação da capacitância da dupla camada elétrica. As previsões do modelo teórico foram confirmadas tanto através de resultados obtidos com um sistema modelo como também em determinações realizadas nas diferentes regiões geradas pela soldagem por FSW da liga 2024-T3.
Weight reduction is a fundamental technological issue for the aerospace industry, as it decreases the fuel consumption, resulting in reduced both costs and greenhouse gases emission. Due to the favorable relation between strength and weight, high strength aluminum alloys favorably contribute to this aspect, but they remain difficult to weld by conventional processes involving fusion, and, therefore, the junction procedure used in aircraft is riveting, resulting in weight gain. The friction stir welding (FSW) process, developed in the early nineties by the \"The Welding Institute\" (TWI), United Kingdom, is a major breakthrough for the welding of aluminum alloys as it allows the production of more reliable and virtually defect-free welds. However, the heating of the parts and the mechanical deformation during FSW generate zones with different microstructures with different corrosion resistances. As they offer high lateral resolution, local electrochemical techniques are useful for elucidating differences in local reactivity of heterogeneous electrodes, as the case of welded metals. In the present work, local electrochemical techniques were employed to characterize the corrosion resistance in chloride environment of the different zones generated by butt welding the 2024-T3 aluminum alloy by FSW, and to compare this response with that displayed by the base metal. The study was complemented with the microstructural characterization of these regions and also by macroscopic corrosion tests. The results of the microstructural characterization confirmed that FSW causes changes in the microstructure of the regions affected by the process, especially with regard to the distribution of the precipitated nanoparticles during the natural aging of the alloy. The results of the macroscopic corrosion and of the local electrochemical tests showed good agreement in the determination of the most sensitive regions to corrosion, which were found to be the heat affected (HAZ) and the thermomechanically affected (TMAZ) zones of the advancing side of the weld tool. They also showed that the regions affected by the welding procedure have a lower corrosion resistance than the base metal. By using Local Electrochemical Impedance Spectroscopy (LEIS), it was shown that the galvanic coupling between the different areas generated during the welding process does not need to be taken into account in the description of the corrosion process, which is at odds with the results published in several studies of this alloy welded by FSW. The work also present an original theoretical contribution, demonstrating that contact-angle measurements and electrochemical impedance spectroscopy in a sessile drop can be used simultaneously to determine the capacity of the interface. The theoretical model predictions were confirmed by the experimental results obtained both with a model system and in the different regions generated by FSW of aluminum alloy 2024-T3.
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Mainka, Julia. "Impédance locale dans une pile à membrane H2/air (PEMFC) : études théoriques et expérimentales." Thesis, Nancy 1, 2011. http://www.theses.fr/2011NAN10042/document.

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Cette thèse apporte des éléments de compréhension de la boucle basse fréquence des spectres d'impédance de PEMFC H2/air. Différentes expressions de l'impédance de transport de l'oxygène alternatives à l'élément de Warburg sont proposées. Elles prennent en compte des phénomènes de transport dans les directions perpendiculaire et parallèle à l'électrode qui sont habituellement négligés: convection à travers la GDL et le long du canal d'air, résistance protonique de la couche catalytique et appauvrissement en oxygène entre l'entrée et la sortie de la cellule. Une attention particulière est portée sur les oscillations de concentration induites par le signal de mesure qui se propagent le long du canal d'air. Ces différentes expressions de l'impédance de transport de l'oxygène sont utilisées dans un circuit électrique équivalent destiné à simuler l'impédance de la cellule. Une comparaison entre résultats expérimentaux et théoriques permet d'identifier les paramètres du circuit électrique. A partir de ces paramètres, il est possible d'analyser les mécanismes physiques et électro-chimiques qui se produisent dans la pile, ainsi que de tirer certaines conclusions sur les phénomènes de transport de l'oxygène dans les milieux poreux de la cathode. Pour cela, nous avons utilité des cellules segmentées et instrumentées conçues et fabriquées au laboratoire
The aim of this Ph.D thesis is to contribute to a better understanding of the low frequency loop in impedance spectra of H2/air fed PEMFC and to bring information about the main origin(s) of the oxygen transport impedance through the porous media of the cathode via locally resolved EIS. Different expressions of the oxygen transport impedance alternative to the one-dimensional finite Warburg element are proposed. They account for phenomena occurring in the directions perpendicular and parallel to the electrode plane that are not considered usually: convection through the GDL and along the channel, finite proton conduction in the catalyst layer, and oxygen depletion between the cathode inlet and outlet. A special interest is brought to the oxygen concentration oscillations induced by the AC measuring signal that propagate along the gas channel and to their impact on the local impedance downstream. These expressions of the oxygen transport impedance are used in an equivalent electrical circuit modeling the impedance of the whole cell. Experimental results are obtained with instrumented and segmented cells designed and built in our group. Their confrontation with numerical results allows to identify parameters characterizing the physical and electrochemical processes in the MEA
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Ocaña, Tejada Cristina. "Aptasensors based on electrochemical impedance spectroscopy." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/305103.

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En els últims anys, a causa de la necessitat de diàgnostics ràpids i de millores en sensat, s’han utilitzat nous elements de reconeixement en biosensors. Un tipus d’aquests nous elements de reconeixement són els aptàmers. Els aptàmers són cadenes sintètiques de ADN o ARN les quals són seleccionades in vitro i tenen la capacitat d’unir-se a proteïnes, ions, cèl.lules, fàrmacs i lligands de baix pes molecular, reconeixent les seves molècules diana amb alta afinitat i especificitat. Diversos biosensors basats en aptàmers, també anomenats aptasensors, han sigut desenvolupats recentment. D’entre totes les tècniques de transducció utilitzades en biosensors, l’Espectrocòpia Electroquímica d’Impedància ha sigut àmpliament emprada como a eina per caracteritzar la superficies de sensors i estudiar esdeveniments en el biosensat en la superficie d’elèctrodes. La característica més important que presenta aquesta tècnica és que no requereix cap espècie marcada per a la transducció, per tant, aquesta tècnica de detecció pot utilitzar-se per dissenyar protocols de detecció directa sense marcatge, evitant assajos més cars i laboriosos. El principal objectiu d’aquesta tesi doctoral va ser el desenvolupament d’aptasensors utilitzant la tècnica electroquímica d’impedància esmentada anteriorment. Per a això, diferents tipus d’elèctrodes van ser utilitzats, tals com elèctrodes de compòsit grafit-epoxi, elèctrodes de biocompòsit grafit-epoxi modificats amb molècules d’avidina i elèctrodes comercials serigrafiats de nanotubs de carboni de paret múltiple. El treball es va dividir principalmente en dues parts d'acord amb la detecció de dues proteïnes diferents. La primera part es va focalitzar en la detecció de trombina. Primer de tot, es van comparar i avaluar diversos aptasensors de detecció directa sense marcatge basat en diferents tècniques d'immobilització dels aptàmers, tals com: adsorció física humida, afinitat avidina-biotina i enllaç covalent mitjançant activació electroquímica de la superfície de l'elèctrode i mitjançant inserció electroquímica. Posteriorment, els elèctrodes de biocompòsit van ser comparats com a plataformes en genosensat i aptasensat. Amb la finalitat d'amplificar el senyal impedimètric obtingut utilitzant elèctrodes de biocompòsit, un protocol sàndwich va ser emprat incloent nanopartícules d'or modificades amb estreptavidina i tractament amplificador de plata. La segona part de l'estudi es va basar en la detecció de citocrom c. Primerament, es va realitzar un simple aptasensor de detecció directa sense marcatge per a la detecció d'aquesta proteïna utilitzant la tècnica d'immobilització d'adsorció física humida. Finalment, i amb l'objectiu d'amplificar el señal impedimètric, es va desenvolupar un assaig tipus sándwich híbrid d’aptàmer i anticòs utilitzant elèctrodes serigrafiats de nanotubs de carboni de paret múltiple. D'aquesta manera, la tesi explora i compara una àmplia gamma de procediments d'immobilització, l'ús de detecció directa sense marcatge o nanomaterial modificat amb biomolècules en diferents protocols directes o d'amplificació, i l'ús de reconeixement directe i sándwich per amplificar la sensibilitat i/o la selectivitat de l'assaig.
In the recent years, due to the need for rapid diagnosis and improvements in sensing, new recognition elements are employed in biosensors. One kind of these new recognition elements are aptamers. Aptamers are synthetic strands of DNA or RNA which are selected in vitro and have the ability to bind to proteins, ions, whole cells, drugs and low molecular weight ligands recognizing their target with high affinity and specificity. Several aptamer-based biosensors, also called aptasensors, have been recently developed. Among all the transduction techniques employed in biosensors, Electrochemical Impedance Spectroscopy has widely used as a tool for characterizing sensor platforms and for studying biosensing events at the surface of the electrodes. The important feature presented by this technique is that it does not require any labelled species for the transduction; thus, this detection technique can be used for designing label-free protocols thus avoiding more expensive and time-consuming assays. The main aim of this PhD work was the development of aptasensors using the electrochemical impedance technique previously mentioned for protein detection. For that, different types of electrodes were used, such as Graphite Epoxy Composite electrodes (GECs), Avidin Graphite Epoxy Composite electrodes (AvGECs) and commercial Multi-Walled carbon nanotubes screen printed electrodes (MWCNT-SPE). The work was divided in two main parts according to the detection of the two different proteins. The first part was focused on thrombin detection. First of all, different impedimetric label-free aptasensors based on several aptamer immobilization techniques such as wet physical adsorption, avidin-biotin affinity and covalent bond via electrochemical activation of the electrode surface and via electrochemical grafting were developed and evaluated. Then, AvGECs electrodes were compared as a platform for genosensing and aptasensing. With the aim to amplying the obtained impedimetric signal using AvGECs, an aptamer sandwich protocol for thrombin detection was used including streptavidin gold-nanoparticles (Strep-AuNPs) and silver enhancement treatment. The second part of the study was based on cytochrome c detection. Firstly, a simple label-free aptasensor for the detection of this protein using a wet physical adsorption immobilization technique was performed. Finally, with the goal to amplify the impedimetric signal, a hybrid aptamer-antibody sandwich assay using MWCNT-SPE for the detection of the target protein was carried out. In this way, the thesis explores and compares a wide scope of immobilization procedures, the use of label-free or nanocomponent modified biomolecules in different direct or amplified protocols, and the use of direct recognition and sandwich alternatives to enhance sensitivity and/or selectivity of the assay
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Barton, Raymond Terence. "Characterisation of nickel electrodes by electrochemical impedance spectroscopy." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/12219.

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The thesis describes an electrochemical investigation of different types of nickel electrode used in nickel-cadmium cells, which are available commercially or currently under development. Impedance spectroscopy has been used to determine the electrochemical characteristics of these electrodes. The electrochemistry of the nickel electrodes was modelled by the electrical analogue method. Allowance was made within the model for porosity and adsorption effects. Component values were initially estimated by graphical techniques and the computer fitting procedure was then completed by an iterative process to provide kinetic parameters which were used to compare and contrast the characteristics of the nickel sintered, pocket and plastic bonded electrodes. The technological target of this work was establish a possible method by which the residual capacity remaining within nickel-cadmium cells could be determined. The kinetic parameters generated by the electrical analogue technique have provided data on which to base a measurement for the prediction of the state of charge in nickel-cadmium cells.
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Ma, Hongshen 1978. "Electrochemical Impedance Spectroscopy using adjustable nanometer-gap electrodes." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42240.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.
Includes bibliographical references (p. 151-154).
Electrochemical Impedance Spectroscopy (EIS) is a simple yet powerful chemical analysis technique for measuring the electrical permittivity and conductivity of liquids and gases. Presently, the limiting factor for using EIS as a portable chemical detection technology is the lack of absolute accuracy stemming from uncertainties in the geometrical factor used to convert measurable quantities of capacitance and conductance into the intrinsic parameters of permittivity and conductivity. The value of this geometrical conversion factor can be difficult to predict since it is easily affected by fringing electric fields, manufacturing variations, and surface chemistry. Existing impedance test cells typically address this problem using a calibration liquid with known permittivity and conductivity, however, this correction is not feasible in many applications since the calibration liquid may irreversibly contaminate the test electrodes. This thesis presents a technique for accurately measuring the permittivity and conductivity of liquids and gases without requiring the use of calibration liquids. This technique is made possible by precisely controlling the separation between two spherical electrodes to measure capacitance and conductance of the sample medium as a function of electrode separation. By leveraging the geometrical accuracy of the spherical electrodes and precise control of the electrode separation, the permittivity and conductivity of the sample can be determined without wet calibration. The electrode separation is adjusted using a flexure stage and a servomechanical actuator, which enables control the electrode separation with 0.25 nm resolution over a range of 50 gm. The nanometer smooth surfaces of the spherical electrodes also enable electrode gaps of less than 20 nm to be created.
(cont.) The technique for measuring permittivity and conductivity presented in this thesis could eventually be adapted to make miniaturized disposable impedance test cells for chemical analysis. Such systems could take advantage of conductivity assays to determine the presence and concentration of specific substances. The adjustable nanometer electrode gap can also be used to study the properties of chemical and biological systems in highly confined states. These studies are fundamentally important for understanding biochemical processes in natural systems where reactions often take place inside confined structures such as cells, organelles, and the intercellular matrix.
by Hongshen Ma.
Ph.D.
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Zheng, Linan. "DETECTION OF CHLAMYDIA TRACHOMATIS BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/theses/1966.

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Chlamydia trachomatis is detected by electrochemical impedance spectroscopy using a mouse monoclonal IgG2a anti-MOMP antibody immobilized onto a Si electrode. Two types of electrochemical cells are used in this study, one with the electrode at the bottom and the other will the electrode on the side. Control experiments with Escherichia coli demonstrate this biosensor is not selective to Chlamydia trachomatis. Another control experiment with Chlamydia trachomatis immobilized onto mouse monoclonal IgG2a isotype antibody coated electrode obtains an increased charge transfer resistance (Rct) which is inversely proportional to the rate of electron transfer. These results demonstrate further investigations are needed to develop the Chlamydia trachomatis impedance biosensor.
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Xu, Mengyun. "Optimised label-free biomarker assays with electrochemical impedance spectroscopy." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:e527a06b-25e5-48fe-8be5-3c0c10210b74.

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There is huge academic interest and clinical need associated with the development of biomarker immunoassays where general aims are the generation of highly specific, convenient and sensitive sensing formats. In this project, a powerful electrochemical technique, electrochemical impedance spectroscopy (EIS), is applied in the establishment of powerful biomarker detecting protocols. Firstly, ultrasensitive, label-free and reusable insulin sensors, based on an antibody-PEGylated thiol self-assembly monolayer (PEG thiol SAM) interface, were produced and characterised via Faradaic EIS, presenting a detection limit (LOD) of 1.2 pM, a linear range across four orders of magnitude, and high sensitivity in even 50 % serum. By applying similar surface chemistry, a label-free biosensor, specific for the detection of α-synuclein antibodies, was fabricated. The α-synuclein interfaces used enabled the reliable detecting of this biomarker in patient sample serum. The concentration levels in the control and a patient group were determined to be significantly different, and, significantly, this difference was consistently across two different cohorts. Strikingly, this could potentially underpin an entirely new means of early Parkinson’s disease (PD) diagnosis. Non-Faradaic EIS methods were additionally applied to label-free insulin assays at both PEG thiol SAM and zwitterionic polymer film interfaces. The latter presented not only an exceptionally non-fouling interface, but also one seemingly both highly biocompatible and facilitating enhanced receptor: target binding. Finally, impedance assays, though potent, generally, operate by sampling only one of a limited number of available experimental variables, typically, Rct for Faradaic EIS, or C or Z for non-Faradaic EIS. Work carried out herein also explores the generation and utility of a portfolio of mathematically derived immittance functions all obtained from the same raw data sets. A particular focus was the examination of whether these were capable of increasing assay sensitivity and efficiency above normal impedance treatments.
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Foley, John J. "Microfluidic Electrical Impedance Spectroscopy." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1950.

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The goal of this study is to design and manufacture a microfluidic device capable of measuring changes in impedance valuesof microfluidic cell cultures. Tocharacterize this, an interdigitated array of electrodes was patterned over glass, where it was then bonded to a series of fluidic networks created in PDMS via soft lithography. The device measured ethanol impedance initially to show that values remain consistent over time. Impedance values of water and 1% wt. saltwater were compared to show that the device is able to detect changes in impedance, with up to a 60% reduction in electrical impedance in saltwater. Cells were introduced into the device, where changes in impedance were seen across multiple frequencies, indicating that the device is capable of detecting the presence of biologic elements within a system. Cell measurements were performed using NIH-3T3 fibroblasts.
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Formisano, Nello. "A study on the optimisation of electrochemical impedance spectroscopy biosensors." Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687325.

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Electrochemical impedance spectroscopy (EIS) has been one of the most intensively studied electrochemical techniques for biosensing in recent decades. However, despite its great potential, real applications of EIS sensors still remain not as widely spread as other techniques because there are many factors that govern impedimetric signals. In particular, features such as the probe coverage density on the sensor surface, as well as the target size, charge and conformation, can assume significant importance. The aim of this study was to analyse both the limitations and the potential solutions for maximizing the EIS signals in certain possible systems which are characterised by having different types of target to detect. In order to reproduce different conditions, four types of molecular targets have been taken in consideration. These provided example systems where the approach for the development of an EIS sensor varied considerably. In the first system the importance of the surface conditions of an aptasensor for prostate specific antigen (PSA) using Faradaic processes was reported. It was demonstrated that the effect of the target binding combined with the relative surface charge modification can diminish the EIS signals. In the second system, a strategy for improving the sensitivity and selectivity of the assay for drug discovery applications was demonstrated. This was obtained by adopting ferrocene-crowned gold nanoparticles that specifically bind to the molecular targets and induced a transition from non-Faradaic to Faradaic processes. In the last two example systems, particular attention has also been given to non-Faradaic processes which are the least exploited in EIS systems although the technique can be simpler to implement compared to Faradaic EIS. Moreover, with non-Faradaic processes more effective results can be achieved under some specific conditions, such as exploiting the size and charge of molecular targets. On such premises, the current work wants to serve as a reference for overcoming the limitations met in several EIS systems and hopefully contribute as a support for enhancing the fields of applications of EIS sensors.
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Valenzuela, Jorge Ignacio. "Electrochemical impedance spectroscopy options for proton exchange membrane fuel cell diagnostics." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/266.

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Electrochemical impedance spectroscopy (EIS) has been exploited as a rich source of Proton Exchange Membrane Fuel Cell (PEMFC) diagnostic information for many years. Several investigators have characterized different failure modes for PEMFCs using EIS and it now remains to determine how this information is to be obtained and used in a diagnostic or control algorithm for an operating PEMFC. This work utilizes the concept of impedance spectral fingerprints (ISF) to uniquely identify between failure modes in an operating PEMFC. Three well documented PEMFC failure modes, carbon monoxide (CO) poisoning, dehydration, and flooding were surveyed, modelled, and simulated in the time domain and the results were used to create a database of ISFs. The time domain simulation was realized with a fractional order differential calculus state space approach. A primary goal of this work was to develop simple and cost effective algorithms that could be included in a PEMFC on-board controller. To this end, the ISF was discretized as coarsely as possible while still retaining identifying spectral features using the Goertzel algorithm in much the same way as in dual tone multi-frequency detection in telephony. This approach generated a significant reduction in computational burden relative to the classical Fast Fourier Transform approach. The ISF database was used to diagnose simulated experimental PEMFC failures into one of five levels of failure: none (normal operation), mild, moderate, advanced, and extreme from one of the three catalogued failure modes. The described ISF recognition algorithm was shown to correctly identify failure modes to a lower limit of SNR = 1dB.
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Books on the topic "Local electrochemical impedance spectroscopy"

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Orazem, Mark E., and Bernard Tribollet. Electrochemical Impedance Spectroscopy. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470381588.

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Orazem, Mark E., and Bernard Tribollet. Electrochemical Impedance Spectroscopy. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119363682.

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Boškoski, Pavle, Andrej Debenjak, and Biljana Mileva Boshkoska. Fast Electrochemical Impedance Spectroscopy. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53390-2.

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Lasia, Andrzej. Electrochemical Impedance Spectroscopy and its Applications. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4614-8933-7.

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Srinivasan, Ramanathan, and Fathima Fasmin. An Introduction to Electrochemical Impedance Spectroscopy. First edition. | Boca Raton : CRC Press, 2021.: CRC Press, 2021. http://dx.doi.org/10.1201/9781003127932.

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Yuan, Xiao-Zi, Chaojie Song, Haijiang Wang, and Jiujun Zhang. Electrochemical Impedance Spectroscopy in PEM Fuel Cells. London: Springer London, 2010. http://dx.doi.org/10.1007/978-1-84882-846-9.

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Cottis, Robert. Electrochemical impedance and noise. Huston, TX: NACE International, 1999.

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Thomas, D. L. Testing and analysis of electrochemical cells using frequency response. [Marshall Space Flight Center, Ala.]: National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1992.

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Stoĭnov, Z. B. Differential impedance analysis. Sofia: Marin Drinov Academic Publishing House, 2005.

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Impedance spectroscopy with application to electrochemical and dielectric phenomena. Hoboken, N.J: Wiley, 2012.

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Book chapters on the topic "Local electrochemical impedance spectroscopy"

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Retter, Utz, and Heinz Lohse. "Electrochemical Impedance Spectroscopy." In Electroanalytical Methods, 149–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-662-04757-6_8.

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Retter, Utz, and Heinz Lohse. "Electrochemical Impedance Spectroscopy." In Electroanalytical Methods, 159–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02915-8_8.

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González-Cortés, Araceli. "Electrochemical Impedance Spectroscopy." In Agricultural and Food Electroanalysis, 381–419. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118684030.ch14.

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Sharifi-Asl, Samin, and Digby D. Macdonald. "Electrochemical Impedance Spectroscopy." In Developments in Electrochemistry, 349–65. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118694404.ch19.

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Azzarello, E., E. Masi, and S. Mancuso. "Electrochemical Impedance Spectroscopy." In Plant Electrophysiology, 205–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29119-7_9.

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Naumann, Renate L. C. "Electrochemical Impedance Spectroscopy (EIS)." In Functional Polymer Films, 791–807. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527638482.ch25.

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Boškoski, Pavle, Andrej Debenjak, and Biljana Mileva Boshkoska. "Fast Electrochemical Impedance Spectroscopy." In Fast Electrochemical Impedance Spectroscopy, 9–22. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53390-2_2.

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Boškoski, Pavle, Andrej Debenjak, and Biljana Mileva Boshkoska. "Introduction." In Fast Electrochemical Impedance Spectroscopy, 1–7. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53390-2_1.

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Boškoski, Pavle, Andrej Debenjak, and Biljana Mileva Boshkoska. "Statistical Properties." In Fast Electrochemical Impedance Spectroscopy, 23–30. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53390-2_3.

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Boškoski, Pavle, Andrej Debenjak, and Biljana Mileva Boshkoska. "Test Cases." In Fast Electrochemical Impedance Spectroscopy, 31–41. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53390-2_4.

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Conference papers on the topic "Local electrochemical impedance spectroscopy"

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Ahmed, Riaz, and Kenneth Reifsnider. "Study of Influence of Electrode Geometry on Impedance Spectroscopy." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33209.

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Electrochemical Impedance Spectroscopy (EIS) is a powerful and proven tool for analyzing AC impedance response. A conventional three electrode EIS method was used to perform the investigation in the present study. Saturated potassium chloride solution was used as the electrolyte and three different material rods were used as working electrodes. Different configurations of electrode area were exposed to the electrolyte as an active area to investigate electrode geometry effects. Counter to working electrode distance was also altered while keeping the working electrode effective area constant to explore the AC response dependence on the variation of ion travel distance. Some controlled experiments were done to validate the experimental setup and to provide a control condition for comparison with experimental results. A frequency range of 100 mHz to 1 MHz was used for all experiments. In our analysis, we have found a noteworthy influence of electrode geometry on AC impedance response. For all electrodes, impedance decreases with the increase of effective area of the electrolyte. High frequency impedance is not as dependent on geometry as low frequency response. The observed phase shift angle drops in the high frequency region with increased working electrode area, whereas at low frequency the reverse is true. Resistance and capacitive reactance both decrease with an increase of area, but resistance response is more pronounce than reactance. For lower frequencies, small changes in working area produce very distinctive EIS variations. Electrode material as well as geometry was systematically varied in the present study. From these and other studies, we hope to develop a fundamental foundation for understanding specific changes in local geometry in fuel cell (and other) electrodes as a method of designing local morphology for specific performance.
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Majumdar, Prasun, Md Raihan, Kenneth Reifsnider, and Fazle Rabbi. "Effect of Porous Electrode Morphology on Broadband Dielectric Characteristics of SOFC and Methodologies for Analytical Predictions." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54946.

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Heterogeneous dielectric material systems and their interfaces which are engineered at the local level (atomic/nano/micro scale) present special challenges for analysis and interpretation of their macroscopic functional behavior in response to specific operational histories. In addition to the chemical composition of the material, the local morphology plays a definitive role in the determination of the transport, electrochemical, and mechanical functions of the heterogeneous constituents, and especially in their interaction and collective action. The basic science of the effect of morphology on polarization, resulting multi-physics properties, and their evolution processes (which determine durability and life) are less well understood. The present paper will focus on a small part of this broader problem. Specifically, the effect of porous microstructure on the broadband dielectric characteristics of the solid oxide fuel cell (SOFC) will be discussed. Different variations of microstructure (such as porosity, pore connectivity, distribution, geometry etc) of YSZ based SOFC materials will be studied using a broadband dielectric spectroscopy system at different temperatures. A finite element based meso-to-continuum model (mm scale model with micron scale features) will be developed to predict dielectric characteristics (voltage, current, impedance distribution) utilizing actual morphology (captured via a 3D X-ray tomography microscope). The paper will summarize all preliminary results from the ongoing research and provide a pathway towards a robust analysis that will help design better microstructures for SOFC electrodes.
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Hossain, Md Kamal, and S. M. Rakiul Islam. "Battery Impedance Measurement Using Electrochemical Impedance Spectroscopy Board." In 2017 2nd International Conference on Electrical & Electronic Engineering (ICEEE). IEEE, 2017. http://dx.doi.org/10.1109/ceee.2017.8412902.

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Han, H., N. B. Sabani, F. Takei, K. Nobusawa, and I. Yamashita. "DNA detection by Electrochemical Impedance Spectroscopy." In 2019 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2019. http://dx.doi.org/10.7567/ssdm.2019.a-3-01.

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Olarte, Oscar, Kurt Barbe, Wendy Van Moer, and Yves Van Ingelgem. "Glucose characterization based on electrochemical impedance spectroscopy." In 2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2014. http://dx.doi.org/10.1109/i2mtc.2014.6860860.

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Michaels, Pauline, Simone Ciampi, Chan Yean Yean, and J. Justin Gooding. "Target DNA recognition using electrochemical impedance spectroscopy." In 2010 International Conference on Nanoscience and Nanotechnology (ICONN). IEEE, 2010. http://dx.doi.org/10.1109/iconn.2010.6045241.

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Bhatnagar, Purva, and Fred R. Beyette. "Electrochemical impedance spectroscopy circuitry for biosensor applications." In 2017 IEEE 60th International Midwest Symposium on Circuits and Systems (MWSCAS). IEEE, 2017. http://dx.doi.org/10.1109/mwscas.2017.8053211.

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Park, Ji-Seong, Chan-Young Park, Yu-Seop Kim, Hye-Jeong Song, and Jong-Dae Kim. "Reducing Impedance Fluctuation by Electrode Structure for Electrochemical Impedance Spectroscopy." In Advanced Science and Technology 2017. Science & Engineering Research Support soCiety, 2017. http://dx.doi.org/10.14257/astl.2017.143.24.

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Xie, Yuanyuan, and Xingjian Xue. "First Principle Electrochemical Impedance Spectroscopy Simulation for SOFCs." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33101.

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Electrochemical impedance spectroscopy (EIS) is a widely utilized experimental method for fundamental mechanism understanding and diagnosis of solid oxide fuel cells (SOFCs). However, EIS experimental results are in general interpreted using equivalent circuit model method. When EIS response induced by very complicated multi-physics processes in SOFC is approximated with a simple equivalent circuit, it will inevitably lead to ambiguity. In this research, first principle EIS simulation method is developed to link multi-physics processes of a button cell to EIS response. The EIS modeling method is validated using experimental data from open literature. The validated EIS model is employed to investigate SOFC performance. Simulation results indicate that EIS response contains a plethora of SOFC behavior information that collectively contributed by intrinsic SOFC material property, porous microstructure, as well as operating conditions. The simulation method developed in this research can be potentially utilized for interpretation and de-convolution of experimental EIS results.
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Narakathu, Binu Baby, Wen Guo, Sherine O. Obare, and Massood Z. Atashbar. "Electrochemical impedance spectroscopy sensing of toxic organophosphorus compounds." In 2010 Ninth IEEE Sensors Conference (SENSORS 2010). IEEE, 2010. http://dx.doi.org/10.1109/icsens.2010.5690337.

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Reports on the topic "Local electrochemical impedance spectroscopy"

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Rivera, Rimi, and Narinder Mehta. Electrochemical Impedance Spectroscopy Evaluation of Primed BMI-Graphite/Aluminum Galvanic System. Fort Belvoir, VA: Defense Technical Information Center, July 2001. http://dx.doi.org/10.21236/ada390067.

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Hu, Hongqiang, Claire Xiong, Mike Hurley, and Ju Li. Establishing New Capability of High Temperature Electrochemical Impedance Spectroscopy Techniques for Equilibrium and Kinetic Experiments. Office of Scientific and Technical Information (OSTI), December 2017. http://dx.doi.org/10.2172/1468632.

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Olaes, Christopher, Richard Lampo, Lawrence Clark, Susan Drozdz, and Jeffrey Ryan. Demonstration and validation of portable electrochemical impedance spectroscopy technology : final report on Project F11-AR08. Construction Engineering Research Laboratory (U.S.), June 2018. http://dx.doi.org/10.21079/11681/27349.

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D. Zagidulin, P. Jakupi, J.J. Noel, and D.W. Shoesmith. Evaluation of an Oxide Layer on NI-CR-MO-W Alloy Using Electrochemical Impedance Spectroscopy and Surface Analysis. Office of Scientific and Technical Information (OSTI), December 2006. http://dx.doi.org/10.2172/899320.

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Hosbein, Kathryn. The Application of Electrochemical Impedance Spectroscopy to Immediately Diagnose the Protective Quality of Coatings on Artistic and Architectural Metalwork. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.3305.

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