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Dissertations / Theses on the topic 'Converter-Based impedance spectroscopy (IS)'

Author: Grafiati

Published: 19 October 2024

Last updated: 31 July 2025

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1

Wang, Xin. "Online health monitoring of photovoltaic panels by converter-based impedance spectroscopy." Electronic Thesis or Diss., Université de Lorraine, 2024. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2024_0039_WANG.pdf.

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Pour répondre aux besoins énergétiques croissants à travers le monde et dans un objectif de développement durable, l'utilisation de l'énergie solaire entraine une augmentation significative de l'installation de panneaux photovoltaïques (PV) permettant une production d'électricité propre et renouvelable. Cependant, les panneaux PV sont susceptibles de présenter des défauts dus aux menaces environnementales, aux facteurs humains ou à des périodes de fonctionnement prolongées. Ces défauts peuvent entraîner des pertes de puissance, une faible efficacité, une instabilité du système et présenter un

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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 t

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3

Mosunmola, Faloye Omolola. "Design and Implementation of A Three-Level Boost converter for Battery Impedance Spectroscopy." Master's thesis, Faculty of Engineering and the Built Environment, 2021. http://hdl.handle.net/11427/32664.

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Lithium-ion batteries are the most are widely used as electrical storage device in various applications such as portable electronics, electric vehicles, Photovoltaic application, telecommunication etc due to the characteristics of the batterie such as high-power density, long cycling and high-power efficiency. Extensive condition monitoring of the battery should be implemented due to the usage of the battery so that there will be an increase in all the overall performance and expectancy. This research is focused on implementing an online condition monitoring on the Li-ion battery using a signa

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4

Ha, Sungjae. "A malaria diagnostic system based on electric impedance spectroscopy." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66030.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 69-71).<br>Malaria caused by Plasmodium falciparum infection is one of the major threats to world health and especially to the community without proper medical care. New approach to cost-efficient, portable, miniaturized diagnostic kit is needed. This work explores electric impedance spectroscopy (EIS) on a microfluidic device as a means of malaria diagnosis. This work introduces a microfabricated p

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5

Lagares, Lemos Miguel. "Matlab Based Specific Impedance Spectroscopy Simulator for Suspension of Cells." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19348.

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By means of the analytical formula of specific impedance for the spherical cells in suspensionintroduced by Kenneth S. Cole in 1928, a bioimpedance simulator has been developed for thegeneration of specific impedance spectrums of suspension of cells. With the help of the simulatorthe user can obtain different impedance spectrums according with the biophysical parameters ofthe cell suspension. Then, generate different kind of plots in order to understand and interpret allthe resulting information.With the selection of different values and range of the biophysical parameters to obtain thespectru

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6

Guermazi, Mahdi. "In-Vitro Biological Tissue State Monitoring based on Impedance Spectroscopy." Doctoral thesis, Universitätsverlag der Technischen Universität Chemnitz, 2016. https://monarch.qucosa.de/id/qucosa%3A20484.

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The relationship between post-mortem state and changes of biological tissue impedance has been investigated to serve as a basis for developing an in-vitro measurement method for monitoring the freshness of meat. The main challenges thereby are the reproducible measurement of the impedance of biological tissues and the classification method of their type and state. In order to realize reproducible tissue bio-impedance measurements, a suitable sensor taking into account the anisotropy of the biological tissue has been developed. It consists of cylindrical penetrating multi electrodes realizing

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7

Yaremyk, R. Ya. "DSP-Based Information-Measuring Microdevice for Electrical Impedance Spectroscopy Analysis." Thesis, Sumy State University, 2016. http://essuir.sumdu.edu.ua/handle/123456789/47278.

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8

Guermazi, Mahdi. "In-Vitro Biological Tissue State Monitoring based on Impedance Spectroscopy." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-206710.

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The relationship between post-mortem state and changes of biological tissue impedance has been investigated to serve as a basis for developing an in-vitro measurement method for monitoring the freshness of meat. The main challenges thereby are the reproducible measurement of the impedance of biological tissues and the classification method of their type and state. In order to realize reproducible tissue bio-impedance measurements, a suitable sensor taking into account the anisotropy of the biological tissue has been developed. It consists of cylindrical penetrating multi electrodes realizing g

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9

Moore, Sean. "Online condition monitoring of lithium ion batteries by performing impedance spectroscopy using a DC-DC converter." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29186.

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Li-Ion batteries are currently being used extensively in a variety of applications such as portable electronics, electric vehicles and grid storage applications, due to the high demand for high power and high energy density storage batteries. However, the usage of Li-Ion batteries requires extensive condition monitoring to increase overall performance and life expectancy. This research is focused on implementing rapid online condition monitoring techniques, using signal injection via the associated power converter in the battery management system. The technique implemented in this work is know

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10

Bhatnagar, Purva. "A microcontroller-based Electrochemical Impedance Spectroscopy Platform for Health Monitoring Systems." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439307617.

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11

Pali, Madhavi L. "Detection of Small Molecule Analytes with Biosensors based on Electrochemical Impedance Spectroscopy." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/dissertations/1651.

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Several different approaches were studied to improve and understand the sensitivity and detection limit that could be obtained for biosensors that utilize electrochemical impedance spectroscopy (EIS) for signal transduction. The first project involves the detection of fish hormones by applying Electrochemical impedance spectroscopy (EIS) & Quartz crystal microbalance (QCM) techniques. Detection of three fish hormones, cortisol, insulin-like growth factor 1 (IGF-1), and vitellogenin is studied by both electrochemical impedance spectroscopy (EIS) and quartz crystal microbalance (QCM), and the E

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12

Ateh, Davidson Day. "Study of epithelial cells on polypyrrole based conducting polymers using electrochemical impedance spectroscopy." Thesis, Queen Mary, University of London, 2005. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1749.

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Polypyrrole (PPy) is a conjugated polymer that displays special electronic properties including conductivity. It may be electrogenerated with the incorporation of any anionic species including negatively charged biological molecules such as proteins and polysaccharides. For this thesis, variously loaded-PPy films were prepared on gold sputter-coated coverslips. The growth and characteristics of epithelial cells, namely keratinocytes, were studied on these films by microscopy, biochemical assay, immunocytochemistry and electrochemical impedance spectroscopy. Keratinocyte viability was found to

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Abdur, Rahman Abdur Rub. "CellMap: An Automated Multielectrode Array Cell Culture Analysis System Based on Electrochemical Impedance Spectroscopy." [Tampa, Fla] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002185.

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14

Yu, Ronghua. "Impedance-Based Wireless Sensor Network for Metal-Protective Coating Evaluation." Thesis, North Dakota State University, 2011. https://hdl.handle.net/10365/28837.

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Research has focused on the influences of flowing fluid on the corrosion of bare metals, but there is little emphasis on the degradation of metal-protective coating. Evaluating the metal-protective coating usually uses the Electrochemical Impedance Spectroscopy (EIS) method. This paper presents a new impedance-based wireless sensor network for metal-protective coating evaluation. This wireless sensor network consists of two parts: impedance-based wireless sensor nodes and a wireless data base that are equipped with a network analyzer (AD5933) and a RF transceiver (CC1111/CC1110). In the experi

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15

Kumar, Girdhari. "Development and characterization of novel organic coatings based on biopolymer chitosan." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1164589725.

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16

Wang, Hanqing. "Design and control of a 6-phase Interleaved Boost Converter based on SiC semiconductors with EIS functionality for Fuel Cell Electric Vehicle." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCA009/document.

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Cette thèse traite l’étude et le contrôle d’un hacheur élévateur à 6 phases entrelacées basé sur des semi-conducteurs en carbure de silicium (SiC) et des inductances couplées inverses pour véhicules électriques à pile à combustible (FCEV). . L'ondulation du courant dans la pile est combustible est considérablement réduite et la durée de vie de celle-ci peut être prolongée. Les semi-conducteurs en SiC, en raison de leurs faibles pertes, permettent de meilleures performances thermiques et une fréquence de commutation plus élevée. Les volumes des composants passifs (inductances et condensateurs)

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17

Kikkeri, Kruthika. "Passivated-Electrode Insulator-Based Dielectrophoretic Chips for Rare Cell Analysis." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/96587.

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The analysis of potentially harmful biological particles is imperative for the mitigation of disease. As a result, there is a growing need for tools which can characterize, detect, and separate biological particles for the alleviation of a multitude of disease. One powerful technique for the analysis of cells is the use of dielectrophoresis (DEP) forces for the manipulation of particle movement. DEP is a particle transport phenomenon, induced by the presence of non-uniform electric fields. The dependence on intrinsic electrical properties of cells, have enabled DEP force to be utilized for num

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Sörensen, Sören Per. "Development of a cell-based drug screening platform : extracellular recording and electrochemical impedance spectroscopy on microelectrode array chips." Thesis, University of Bath, 2007. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486476.

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Two established methods, Electrochemical Impedance Spectroscopy (EIS) and extracellular recording, were implemented into a technology platform for non-invasive whole-cell biosensing. Electrical activity of cardiomyocytes and cell-substrate interaction of human ovarian cancer cells was monitored on electrode array chips. The performance of cells inside a microfluidic or closed low volume environment was investigated. Prior to the development of the entire microfluidic platform the two transducing methods were evaluated in single experiments. Processes as cellular attachment and detachment were

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19

Jolly, Pawan. "Oligonucleotide-based biosensors for the detection of prostate cancer biomarkers." Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.704811.

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The introduction of prostate-specific antigen (PSA) testing about 3 decades ago led to the possibility of early detection of prostate cancer (PCa). Although PSA testing reduced the mortality rate, it is also associated with high risk of over diagnosis in patients with and without PCa. Despite the current drawbacks, it would be a challenge to replace PSA testing entirely. Instead, there is a need to develop parallel testing of other potential biomarkers that can complement the results from PSA tests. To address alternative biomarker sensing, this thesis highlights on the development of oligonuc

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Guermazi, Mahdi [Verfasser], Olfa [Gutachter] Kanoun, Nabil [Gutachter] Derbel, and Olfa [Akademischer Betreuer] Kanoun. "In-Vitro Biological Tissue State Monitoring based on Impedance Spectroscopy / Mahdi Guermazi ; Gutachter: Olfa Kanoun, Nabil Derbel ; Betreuer: Olfa Kanoun." Chemnitz : Universitätsverlag der Technischen Universität Chemnitz, 2017. http://d-nb.info/1213815606/34.

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21

Ukyo, Yoshio, Kayo Horibuchi, Hiroki Kondo, et al. "Effect of Mg-doping on the degradation of LiNiO2-based cathode materials by combined spectroscopic methods." Elsevier, 2012. http://hdl.handle.net/2237/20830.

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22

Holmér, Camilla. "Study of green film-forming corrosion inhibitor based on mussel adhesive protein." Thesis, KTH, Skolan för kemivetenskap (CHE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143553.

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Today there are numerous methods to slow down a corrosion process of metallic materials. However, due to environmental effects and health risk issues, several traditional corrosion inhibitors have to be phased out. Hence, it is of great importance to develop new corrosion inhibitors that are “green”, safe, smart and multifunctional. In this essay, the focus is on mussel adhesive protein (MAP) and its possibility to reduce the rate of the corrosion process. The protein exhibit great adhesive strength and protective properties, allowing it to adhere to a multitude of different surfaces and is th

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23

Pesce, Gianluca. "Study of carbonation in novel lime based materials." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629662.

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This research advances the current understanding of the carbonation reaction in porous materials by investigating pH changes during the hardening process of lime, the role of pore-water in the dissolution process of calcium hydroxide and the effects of pore size on precipitation of calcium carbonate solid phases. To achieve this, carbonation is studied within a thin film of an aqueous solution of calcium hydroxide, that simulates the conditions existing in porous media once most of the liquid water has evaporated. The research introduces novel approaches such as the use of specially manufactur

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24

Tuccori, Elena. "Development of biosensors based on Odorant Binding Proteins." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/development-of-biosensors-based-on-odorant-binding-proteins(7ce472da-bfbf-4fb0-a0bc-ed61d0d3be49).html.

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This PhD project aimed to investigate the possibility of using Odorant Binding Proteins (OBPs) as sensing layers of chemical sensors, for the detection of organic compounds in both vapour and liquid phases. OBPs are small soluble proteins present in high concentrations in the olfactory system of vertebrates and insects. OBPs are attractive in the biosensor field since they can bind odorants and pheromones in a reversible way. They are resistant to high temperatures and protease activity and they can be easily expressed in large amounts. OBPs belonging to different species of mammals and insect

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Sadli, Idris. "Modélisation par impédance d'une pile à combustible PEM pour utilisation en électronique de puissance." Thesis, Vandoeuvre-les-Nancy, INPL, 2006. http://www.theses.fr/2006INPL091N/document.

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Cette thèse s’intéresse à la modélisation dynamique d’une pile à combustible (PàC) PEM en vue de son utilisation en électronique de puissance. Un modèle statique basé sur une expression de la tension en fonction du courant débité est tout d’abord présenté. Le modèle dynamique est élaboré ensuite. Il est montré que l’impédance électrochimique de diffusion-convection (Zd) s’apparente à une ligne de transmission de type RC. Une discrétisation en un nombre fini d’éléments a été effectuée. Afin d’obtenir un modèle simple, deux branches RC différentes sont considérées pour l’impédance Zd auxquelles

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26

Kumar, Girdhari. "Development and characterization of novel organic coatings based on biopolymer chitsan." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1164589725.

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27

Kashyap, Aditya Jagannath. "Conducting Polymer Based Gel Electrolytes for pH Sensitivity." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7824.

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The evaluation of concentration of ions and molecules with the help of biosensors have been regarded as an emerging technology. Bio and chemical sensors have a variety of applications in the field of medicine, military, environmental and food industries alike. With an estimated investment growth of over 4.31% in the development of pH sensors in the next five year, the objective of a developing a robust measurement system is all the more required. The scope of this research is to evaluate the ability of conducting polymer-based gel electrolytes for pH sensitivity, as a function of the transisto

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28

Loison, Pierre. "Development of a smart coating based on hollow nanoparticles for corrosion detection and protection." Thesis, La Rochelle, 2019. http://www.theses.fr/2019LAROS009.

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Dans de nombreux domaines, et particulièrement dans le secteur aérospatial, la corrosion est un problème majeur qui engendre d’importants coûts de maintenance et de réparation. Il est donc crucial de protéger les pièces soumises à des environnements agressifs. Dans ce but, une solution originale et prometteuse consiste à détecter et ralentir la corrosion dès ses prémices, en utilisant des revêtements capables de réagir dès son initiation. Récemment, de nombreuses études ont été réalisées en ce sens, développant des revêtements sensibles aux processus électrochimiques liés à la corrosion, faisa

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Chen, Yan-Fang. "Investigation of interfacial and bulk physical properties of hybrid perovskite-based devices." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0268/document.

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Les Pérovskites hybrides organique-inorganique (PHOIs) ont suscité d’intenses recherches au coursdes dernières années. Dans cette thèse, nous avons dans un premier temps mis au point les différentsprocessus de préparation des échantillons et réalisé une caractérisation complète des films parmicroscopie à force atomique, spectroscopie photo-électronique par rayons X, mesure du potentiel desurface par sonde de Kelvin et mesure de la mobilité des charges par temps de vol. La distribution despièges à l'interface PHOI/Au a été étudiée via des mesure J-V-L en fonction de la températurecombinées avec

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SACCO, ADRIANO. "Novel Dye-sensitized Solar Cell architecture based on microfluidic housing system." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2506378.

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The present work is focused on the design, fabrication and characterization of a novel dye-sensitized solar cell architecture exploiting some microfluidic concepts. By using this innovative approach, it became possible to fabricate small laboratory test-cells with a high degree of assembly reproducibility, and develop some interesting applications, like the analysis of the cell components over time, without compromising the cell integrity. The proposed architecture has been used in the experimental test of some innovative materials. The study is of experimental nature and supported by di

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31

Sunday, Christopher Edozie. "The design of ultrasensitive immunosensors based on a new multi-signal amplification gold nanoparticles-dotted 4-nitrophenylazo functionalised graphene sensing platform for the determination of deoxynivalenol." Thesis, University of Western Cape, 2014. http://hdl.handle.net/11394/3361.

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Philosophiae Doctor - PhD<br>A highly dispersive gold nanoparticle-dotted 4-nitrophenylazo functionalised graphene nanocomposite (AuNp/G/PhNO2) was successfully synthesised and applied in enhancing sensing platform signals. Three label-free electrochemical immunosensors for the detection of deoxynivalenol mycotoxin (DON) based on the systematic modification of glassy carbon electrodes (GCE) with AuNp/G/PhNO2 was effectively achieved. General electrochemical impedance method was employed for the sensitive and selective detection of DON in standard solutions and reference material samples. A s

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Sadli, Idris. "Modélisation par impédance d'une pile à combustible PEM pour utilisation en électronique de puissance." Electronic Thesis or Diss., Vandoeuvre-les-Nancy, INPL, 2006. http://www.theses.fr/2006INPL091N.

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Cette thèse s’intéresse à la modélisation dynamique d’une pile à combustible (PàC) PEM en vue de son utilisation en électronique de puissance. Un modèle statique basé sur une expression de la tension en fonction du courant débité est tout d’abord présenté. Le modèle dynamique est élaboré ensuite. Il est montré que l’impédance électrochimique de diffusion-convection (Zd) s’apparente à une ligne de transmission de type RC. Une discrétisation en un nombre fini d’éléments a été effectuée. Afin d’obtenir un modèle simple, deux branches RC différentes sont considérées pour l’impédance Zd auxquelles

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33

Aygun, Seymen Murat. "Gas Sensors Based on Ceramic p-n Heterocontacts." Ames, Iowa : Oak Ridge, Tenn. : Ames Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/837264-2ckydm/webviewable/.

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Thesis (M.S.); Submitted to Iowa State Univ., Ames, IA (US); 19 Dec 2004.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "IS-T 2498" Seymen Murat Aygun. US Department of Energy 12/19/2004. Report is also available in paper and microfiche from NTIS.

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Safa, Meer N. "Poly (Ionic Liquid) Based Electrolyte for Lithium Battery Application." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3746.

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The demand for electric vehicles is increasing rapidly as the world is preparing for a fossil fuel-free future in the automotive field. Lithium battery technologies are the most effective options to replace fossil fuels due to their higher energy densities. However, safety remains a major concern in using lithium as the anode, and the development of non-volatile, non-flammable, high conductivity electrolytes is of great importance. In this dissertation, a gel polymer electrolyte (GPE) consisting of ionic liquid, lithium salt, and a polymer has been developed for their application in lithium ba

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Mini, Sixolile. "Silica Coated Core-Shell Quantum Dot-based Electro-Immunosensor for Interferon Gamma TB Disease Biomarker." University of the Western Cape, 2020. http://hdl.handle.net/11394/7597.

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>Magister Scientiae - MSc<br>Tuberculosis (TB) is a disease that results from infection by Mycobacterium tuberculosis, which is regarded the most common infecting organism. TB has killed countless numbers of people particularly in underdeveloped countries. TB bacteria can remain inactive or in dormant state for years without causing symptoms or spreading to other subjects, but as soon as the immune system of the host becomes weakened, the bacteria become active and infect mainly the lungs along with other parts of body. TB cases are further aggravated by other illnesses that affect the immune

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Sampson, Zaiyaan Begum. "Tungsten Telluride Quantum dot-based Biosensor for Alpha-Methylacyl CoA Racemase – An Emerging Prostate Cancer Biomarker." University of the Western Cape, 2019. http://hdl.handle.net/11394/7709.

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>Magister Scientiae - MSc<br>Prostate cancer, commonly referred to as adenocarcinoma of the prostate, is the leading cause of cancer death in men in 46 countries, and it was estimated that by the end of 2018 there would approximately be 1.3 million new cases of prostate cancer worldwide. Currently, the Food and Drug Administration (FDA) approved biomarker for prostate cancer disease diagnostics Prostate Specific Antigen (PSA) is not specific to the disease itself but extends to other cases such as Benign Prostate Hyperplasia (BPH) a condition in which the prostate grows uncontrollably. This bi

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Quintans, De Souza Gabriel. "A comparison between aqueous and organic electrolytes for lithium ion batteries." Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302287.

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Många batteriers användningsområden kräver att batterierna har hög upp- och urladdningshastighet samt låg kostnad. För dessa användningsområden är vattenbaserade laddningsbara batterier (ARB) ett möjligt alternativ i och med att de är svårantändliga, har god jonledningsförmåga, lägre inre resistans, billigare elektrolytlösning och tillverkning och har potentiellt högre upp- och urladdningshastigheter. Genom att utgå från en cell med LiMn2O4 och V2O5 som katod respektive anod, utvecklades en cell med en spänning på 1 V och prestanda för 2 mol/L LiTSFI i organisk respektive vattenlöslig lösning

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Cooper, Celeste Eaton. "Degradation in Performance of Lanthanum Strontium Manganite Based Solid Oxide Fuel Cell Cathodes Under Accelerated Testing." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1485524881843845.

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Muchindu, Munkombwe. "Electrochemical ochratoxin a immunosensors based on polyaniline nanocomposites templated with amine- and sulphate-functionalised polystyrene latex beads." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3815_1306752491.

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<p>Polyaniline nanocomposites doped with poly(vinylsulphonate) (PV-SO3 &minus<br>) and nanostructured polystyrene (PSNP) latex beads functionalized with amine (PSNP-NH2) and sulphate (PSNP-OSO3 &minus<br>) were prepared and characterised for use as nitrite electro-catalytic chemosensors and ochratoxin A immunosensors. The resultant polyaniline electrocatalytic chemosensors (PANI, PANI|PSNP-NH2 or PANI|PSNP-OSO3 &minus<br>) were characterized by cyclic voltammetry (CV), ultraviolet-visible (UV-Vis) spectroscopy and scanning electron microscopy (SEM). Brown-Anson analysis of the multi-scan rate

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Pan, Ke. "A Systematic Methodology for Characterization and Prediction of Performance of Si-based Materials for Li-ion Batteries." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1578038345015173.

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Gong, Yun. "Structure-property relationships of dyes as applied to dye-sensitized solar cells." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275007.

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This work investigates the correlation of structural and photovoltaic properties of dyes used in dye-sensitized solar cells. Experimental methods, including ultraviolet-visible spectroscopy, fluorescence spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy are employed to study optical and electrochemical properties of dye molecules. Computational methods, including density functional theory and time-dependent density functional theory, are used to validate and predict the optical and electronic properties of dye molecules, in their isolated state and once embedded into

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Masikini, Milua. "The use of cyclodextrin template-based metal oxide nanomaterials in the development of electrochemical sensors for phenolic endocrine disruptor compounds." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_2798_1307953880.

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<p>Iron oxide nanoparticles were prepared using co-precipitation method in the presence and absence of beta-cyclodextrin (&beta<br>-CD). Such materials were characterized using transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), attenuated total reflection Fourier transform infrared (ATR-FTIR), X-ray diffraction (XRD), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA). The TEM shows that the surface morphology has no difference between nanoparticles prepared in the presence and absence of beta-cyclodextrin (&beta<br

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Capute, Batalha Weverson. "Alliages amorphes à pseudo-haute entropie à base de fer : structure/microstructure, corrosion et propriétés mécaniques." Electronic Thesis or Diss., Université Grenoble Alpes, 2023. http://www.theses.fr/2023GRALI098.

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La quête de matériaux alternatifs pour remplacer l'acier inoxydable conventionnel dans les applications marines a récemment gagné en importance. Parmi les candidats émergents, les alliages amorphes à base de fer à faible teneur en chrome ont montré un grand potentiel, bien qu'ils nécessitent une compréhension plus approfondie de leur comportement. Cette recherche étudie l'effet de la dévitrification sur la corrosion et les propriétés mécaniques de deux compositions amorphes pseudo-entropiques novatrices à base de FeCrMoNbB et FeCrMoNiB, ainsi que leur comportement lorsqu'ils sont appliqués en

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Cheekati, Sree Lakshmi. "GRAPHENE BASED ANODE MATERIALS FOR LITHIUM-ION BATTERIES." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1302573691.

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Wong, Yan Chiew. "Impedance matching and DC-DC converter designs for tunable radio frequency based mobile telecommunication systems." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9656.

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Tunability and adaptability for radio frequency (RF) front-ends are highly desirable because they not only enhance functionality and performance but also reduce the circuit size and cost. This thesis presents a number of novel design strategies in DC-DC converters, impedance networks and adaptive algorithms for tunable and adaptable RF based mobile telecommunication systems. Specifically, the studies are divided into three major directions: (a) high voltage switch controller based DC-DC converters for RF switch actuation; (b) impedance network designs for impedance transformation of RF switche

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Chhor, Sarine. "Etude et modélisation de l'interface graphite/électrolyte dans les batteries lithium-ion." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENI067/document.

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Cette thèse se positionne dans le domaine des batteries lithium-ion. Elle a pourobjectif de mieux comprendre le fonctionnement de l’électrode négative de graphiteen étudiant le processus de formation du film de passivation, couramment appeléSEI (Solid Electrolyte Interface) créé à l’interface avec l’électrolyte. Ce travail nousa conduit à proposer des modèles pouvant expliquer comment se forme la SEI et àidentifier les phénomènes qui entrent en jeu dans le fonctionnement de la batterie.La SEI résulte de la réaction entre l’électrode de graphite, les ions lithium et les moléculesorganiques de l

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Sanli, Abdulkadir. "Synthesis and Characterization of Strain Sensitive Multi-walled Carbon Nanotubes/Epoxy based Nanocomposites." Universitätsverlag der Technischen Universität Chemnitz, 2017. https://monarch.qucosa.de/id/qucosa%3A20878.

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Among various nanofillers, carbon nanotubes (CNTs) have attracted a significant attention due to their excellent physical properties. Incorporation of a very low amount of CNTs in polymer matrices enhances mechanical, thermal and optical properties of conductive polymer nanocomposites (CPNs) tremendously. For mechanical sensors, the piezoresistive property of CNTs/polymer nanocomposites exhibits a great potential for the realization of stable, sensitive, tunable and cost-effective strain sensors. Achieving homogeneous CNTs dispersion within the polymer matrices, understanding their complex pie

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Frankeser, Sophia. "Monitoring of age-relevant parameters in an integrated inverter system for electrical drives based on SiC-BJTs." Universitätsverlag der Technischen Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A31470.

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The Silicon Carbide Bipolar Transistor is a device that is barely brought into real application so far. It features very low conduction losses and a high power density. The application is in some points different and unusual in comparison to the mainstream power semiconductors as IGBTs or MOSFETs. The Silicon Carbide Bipolar Transistor, the SiC-BJT, is a current driven device and the effort in driving is uncommonly high. As an outcome of the present work it can be said that it is more like a shift of requirements from the power semiconductor power unit to the driver stage. With consideration o

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Bu, Junfu. "Advanced BaZrO3-BaCeO3 Based Proton Conductors Used for Intermediate Temperature Solid Oxide Fuel Cells (ITSOFCs)." Doctoral thesis, KTH, Tillämpad processmetallurgi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-165073.

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In this thesis, the focus is on studying BaZrO3-BaCeO3 based proton conductors due to that they represent very promising proton conductors to be used for Intermediate Temperature Solid Oxide Fuel Cells (ITSOFCs). Here, dense BaZr0.5Ce0.3Y0.2O3-δ (BZCY532) ceramics were selected as the major studied materials. These ceramics were prepared by different sintering methods and doping strategies. Based on achieved results, the thesis work can simply be divided into the following parts: 1) An improved synthesis method, which included a water-based milling procedure followed by a freeze-drying post-pr

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Jimenez, Saldana Cristhian Carim. "Large Scale Analysis of Massive Deployment of Converter-based Generation equipped with Grid- forming Strategies." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292690.

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To mitigate the carbon footprint and the need to fulfil the energy goals in terms of sustainability, it is required to deploy a large integration of green energies. Therefore, in the previous and the coming years, there will be a high research and technological interest in the high penetration of converter-based generation. With the replacement and integration of power converters into the bulk power grid, new challenges and issues must be faced to maintain the system´s stability and reliability in terms of procedures for the transmission system operators. The main objective of this thesis proj

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