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Dissertations / Theses on the topic 'Electrical conductivity'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Zhang, Yuxi Ph D. Massachusetts Institute of Technology. "Electrospun nanofibers with tunable electrical conductivity." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81690.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 114-117).<br>Electrospinning is a convenient method to produce nanofibers with controlled diameters on the order of tens to hundreds of nanometers. The resulting nonwoven fiber mats are lightweight, highly porous, and have high specific surface areas around 1 to 100 m2/g. Combined with the high electrical conductivity of intrinsically conductive polymers, conductive electrospun fiber mats are promising for a variety of

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2

Kim, Yeon Seok. "Electrical conductivity of segregated network polymer nanocomposites." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1880.

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3

Fisher, Craig Andrew James. "Electrical conductivity of brownmillerite-structured oxide ceramics." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318598.

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4

Tibaldi, Pier Silvio. "Self-Assembly and Electrical Conductivity of Colloids." Thesis, Uppsala universitet, Materialfysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-272198.

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Self-assembly is an astonishing phenomenon at the base of organized structures’ formation from disordered systems. It occurs in nature from atomic and molecular lengths to galactic distances. Nowadays self-assembly of colloidal solutions can be used to fabricate photonic crystals and metamaterials. This paper analyses the self-assembly and its effect on the electric conductivity of a colloid made up of carbon nanotubes and magnetite microparticles controlled by electrostatic potentials and magnetic fields. Alignment of the carbon nanotubes and creation of sparks and short-circuits are observed

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5

Hundermark, Rodney. "The electrical conductivity of melter type slags." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/5316.

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Bibliography: p. 219-226.<br>This thesis details an investigation into the factors affecting the electrical conductivity of slags containing some or all of the following components: Ah03, cae, Cr203, FeOx, MgO and Si02. The interest in the electrical properties of these slags originated from problems being experienced in the electrical control of the melter type furnaces of the platinum producers in South Africa. A large amount of literature on the electrical conductivity of slags was collected and analysed. The key research areas identified through the literature review were: the effect of ir

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6

Su, Bin. "Electrical, thermomechanical and reliability modeling of electrically conductive adhesives." Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-12192005-124641/.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2006.<br>Qu, Jianmin, Committee Chair ; Baldwin, Daniel, Committee Member ; Wong, C. P., Committee Member ; Sitaraman, Suresh, Committee Member ; Jacob, Karl, Committee Member.

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7

Spurio, Eleonora. "Electrical conductivity of single Be-doped GaAs nanowires." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19295/.

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In this thesis the measurement of the current-voltage characteristics of single nanowires in their as-grown geometry is presented. The studied sample is composed by Be-doped GaAs nanowires grown on Si substrate by molecular beam epitaxy. The measurements have been performed using the two terminal and the four terminal geometry, respectively in the laboratories of Universität Siegen and of Leibniz Universität Hannover. For applications of nanowires in optoelectonic applications the knowledge of electronic properties is fundamental for device optimization. The first aim of this work is the inves

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8

Jasbinschek, dos Reis Pinheiro Katia. "Mantle electrical conductivity estimates from geomagnetic jerk observations /." Zürich : ETH, 2009. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18259.

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9

Ozkan, Koray Ozdal. "Multi-frequency Electrical Conductivity Imaging Via Contactless Measurements." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607071/index.pdf.

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A multi-frequency data acquisition system is realized for subsurface conductivity imaging of biological tissues. The measurement procedures of the system at different frequencies are same. The only difference between the single frequency experiments and the multi-frequency experiments is the hardware, i.e. the sensor and the power amplifier used in the single frequency experiments was different than that were used in the multi-frequency experiments. To avoid confusion the measurement system with which the single frequency experiments were performed is named as prototype system and the measurem

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10

Ningelgen, Oliver Peter. "GoC : Gulf of Carpentaria electrical conductivity anomaly experiment /." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09SB/09sbn7149g.pdf.

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11

Uribe-Salas, Alejandro. "Process measurements in flotation columns using electrical conductivity." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70295.

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Techniques based on electrical conductivity to estimate interface level, gas holdup and bias rate in flotation columns were developed.<br>A conductivity probe and associated data acquisition system for locating the froth/collection zone interface in flotation columns were developed and tested. The level detection technique is based on the collection of a conductance profile around the interface and on the location of the position at which a sharp change in conductance occurs. Such a change in conductance across the interface is caused by the difference in the effective conductivity of the frot

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12

Zhang, Maomao. "Permittivity and conductivity imaging in electrical capacitance tomography." Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687378.

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Electrical capacitance tomography (ECT) is a technology that images the dielectric permittivity distribution of materials under test. ECT has been used as a tool for process monitoring in particular for two-phase flow measurement. These applications mainly focus on the dielectric samples, whose conductivity is negligibly small. This thesis studies ECT imaging with conductivity considerations. The conductive materials will affect the capacitance measurements and introduce difficulties in the ECT image reconstruction. This thesis presents solutions based on ECT to image material of different val

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13

Su, Bin. "Electrical, thermomechanical and reliability modeling of electrically conductive adhesives." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/10425.

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The first part of the dissertation focuses on understanding and modeling the conduction mechanism of conductive adhesives. The contact resistance is measured between silver rods with different coating materials, and the relationship between tunnel resistivity and contact pressure is obtained based on the experimental results. Three dimensional microstructure models and resistor networks are built to simulate electrical conduction in conductive adhesives. The bulk resistivity of conductive adhesives is calculated from the computer-simulated model. The effects of the geometric properties of fill

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14

Tran, Sam, Niklas Lindborg, Souza Vivedes Danilo De, Johanna Sjölund, Veronica Enblom, and Mattias Sjödin. "Theoretical models of thermal conductivity and the relationship with electrical conductivity for compressed metal powder." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-387636.

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This Independent Project reviews literature about the eﬀect of pressure and temperature on thermal conductivity in packed beds and its relationship with electrical conductivity. Exploring the relationships between thermal conductivity, porosity and pressure can give useful knowledge for further improvements in manufacturing processes in the ﬁeld of powder metallurgy. The resulting theoretical models describing the eﬀective thermal conductivity show that gas and contact conductance dominate at lower temperatures and that radiation gains dominance as the temperature increases. Modiﬁcations of th

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15

Oh, Tae-il. "Electrical conductivity and related defect structures in reduced rutile." Full text open access at:, 1985. http://content.ohsu.edu/u?/etd,90.

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16

Yu, Shuaibo. "Study of Electrical Conductivity of Epoxy/Graphene Platelet Nanocomposites." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31447.

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Polymer nanocomposites are prepared by appropriately dispersing nanoscale fillers into polymer matrices. Graphene, a two-dimensional nano-carbon material with outstanding physical properties, has been widely studied as a conductive filler for nanocomposites. In this work, a gum Arabic aqueous solution was proposed as a new media to exfoliate graphite into few-layer graphene by liquid-phase sonication. Successful exfoliation was confirmed by Raman spectroscopy, scanning electron microscopy and transmission electron microscopy. Four types of graphene nanoplatelets were used to study the effects

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17

Ismail, Bakar Bin. "Electrical conductivity measurements in evaporated cadmium telluride thin films." Thesis, Keele University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293964.

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18

Major, AndraÌs G. "Contactless determination of the electrical conductivity in levitated liquids." Thesis, University of Bristol, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404079.

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19

Navas, Pérez Carlos Justo 1971. "Synthesis, electrical conductivity and nonstoichiometry of dopped layered perovskites." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85242.

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20

Mashiko, V. V., and I. P. Studenyak. "Electrical conductivity of “liquid crystal – Cu6PS5I superionic nanoparticles” composites." Thesis, Sumy State University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/64321.

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One of the promising methods to extend the liquid crystal (LC) functionality is introduction of the nanoparticles. Thus, nanoparticles of superionic conductors with argyrodyte structure, in particular Cu6PS5I, can help to extend functional properties of LC. They are characterized by high electrical conductivity as well as ferroelastic and nonlinear optical properties. Therefore, the aim of this work was to study the influence of Cu6PS5I nanoparticles on the electrical conductivity of 6СВ and 6СНВТ liquid crystals.

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21

Kress, Oliver Herbert. "Mechanical Tension and Electrical Conductivity of Liquid Crystal Filaments." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1437752455.

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22

Freire, Ricardo Satuf 1962. "Short fiber composites with high electrical and thermal conductivity." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278242.

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This research describes the preparation of electrically and thermally conductive polymer composites. The filler used is short carbon fibers. These were dispersed in methyl methacrylate (MMA) and settled under different vibrational and gravitational forces, resulting in well packed sediments. To improve further the dispersability of the fiber/MMA system, steric stabilization was attempted by using organic dispersants of increasing chain length. Subsequent polymerization of the dense sediments produced composites with high fiber volume fractions. The electrical and thermal conductivities of thes

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23

Isarn, Garcia Isaac. "New epoxy composites with enhanced thermal conductivity keeping electrical insulation." Doctoral thesis, Universitat Rovira i Virgili, 2019. http://hdl.handle.net/10803/668084.

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La tendència creixent a la indústria electrònica de fer aparells cada vegada més petits, més lleugers i que treballin més ràpid provoca un augment de calor generat per efecte Joule, degut a l’augment de freqüència del pas d’electrons. Eliminar aquest excés de calor requereix la millora de la conductivitat tèrmica dels materials ja existents, ja que el mantenir la temperatura de treball d’aquests dispositius està directament relacionat amb l’eficiència, el temps de vida útil i la prevenció de fallades prematures dels equips. Alguns elements dels dispositius electrònics es recobreixen amb reïnes

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24

Tighineanu, Alexei [Verfasser], and Patrik [Akademischer Betreuer] Schmuki. "Electrical Conductivity of TiO2 Nanotubes / Alexei Tighineanu. Gutachter: Patrik Schmuki." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2015. http://d-nb.info/1076673813/34.

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25

Tu, Kai-Ming. "Spatial-Decomposition Analysis of Electrical Conductivity in Concentrated Ionic Systems." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199125.

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26

Pires, Ellis John. "Electrical conductivity of single organic molecules in ultra high vacuum." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/56796/.

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Measurement of the I(V ) characteristics of single molecules is the first step towards the realisation of molecular electronic devices. In this thesis, the electronic transport properties of alkanedithiol (ADT) and alkylthiol-terminated oligothiophene molecules are investigated under ultra high vacuum (UHV) using a scanning tunnelling microscope (STM). Two techniques are employed that rely upon stochastic molecular bridge formation between gold STM tip and substrate; a novel I(V; s) method is proven to be a powerful alternative to the well-known I(s) method. For ADTs, three temperature-indepen

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27

Shearwood, C. "The electrical conductivity and Hall coefficient of sputtered metallic glasses." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383901.

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28

Atashpendar, Arshia [Verfasser], and Tanja [Akademischer Betreuer] Schilling. "Geometric percolation and electrical conductivity in suspensions of conductive nanoparticles." Freiburg : Universität, 2021. http://d-nb.info/1227187483/34.

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29

Harinarayana, Tirumalachetty. "Lithospheric electrical conductivity structure across Southern Scotland and Northern England." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/10936.

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30

Mitscherling, Johannes [Verfasser], and Walter [Akademischer Betreuer] Metzner. "Electrical conductivity in quantum materials / Johannes Mitscherling ; Betreuer: Walter Metzner." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2021. http://d-nb.info/1233681362/34.

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31

Neto, OdÃlio Coimbra da Rocha. "Hiperspectral data applied for estimating electrical conductivity in salty soils." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16620.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>A interpretaÃÃo de dados do sensoriamento remoto fundamenta-se, basicamente, na anÃlise do comportamento da reflectÃncia espectral dos materiais no intervalo de comprimento de onda do visÃvel ao infravermelho de ondas curtas (400 a 2500 nm). Para isso, pode-se usar a espectrorradiometria de reflectÃncia, que Ã uma tÃcnica capaz de medir, em diferentes comprimentos de ondas, a energia eletromagnÃtica refletida da superfÃcie dos materiais e representÃ-la na forma de um grÃfico denominado curva de reflectÃncia espectral. O poder analÃt

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32

Asgari, Mohammadreza. "FULLY-INTEGRATED CMOS PH, ELECTRICAL CONDUCTIVITY, AND TEMPERATURE SENSING SYSTEM." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1533827604228324.

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33

Stewart, Douglas Norman. "Geomagnetic impulses and the electrical conductivity of the lower mantle." Thesis, University of Leeds, 1991. http://etheses.whiterose.ac.uk/1238/.

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This thesis is an investigation of the changes in the magnetic field as measured at the surface of the Earth on the time-scale of months to decades. In particular the phenomena of geomagnetic "impulses" or "jerks" are investigated. Vigorous discussion has surrounded these phenomena since they were first suggested to have been of global scale, of short duration and originating within the core (Courtillot et a/, 1978), primarily because of their implications for lower mantle conductivity. A major point of discussion has been whether they were of internal or external origin, and to what extent ex

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34

Imashuku, Susumu. "Electrical Conductivity of Grain Boundary in Accepter Doped Barium Zirconate." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/78014.

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35

Uppal, Rajeev. "Effect of TiO₂ on the electrical conductivity of Al₂O₃." Thesis, University of Bath, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323708.

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36

Fraser, Iain Stuart. "Electrical conduction in macroscopic carbon nanotube assemblies." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609756.

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37

Munro, Brian. "Electrical and spectroscopic studies of new silver gallium thiophosphate glasses." Thesis, University of Aberdeen, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.290249.

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New silver gallium thiophosphate glasses in the Ag<SUB>2</SUB>S-Ga<SUB>2</SUB>S<SUB>3</SUB>-'P<SUB>4</SUB>S<SUB>8</SUB>' system were studied employing a.c. impedance, Raman and IR spectroscopy. 'P<SUB>4</SUB>S<SUB>8</SUB>' does not exist and is used so that the compositions can be conventionally expressed in terms of network modifier and network formers. The glasses were in fact prepared from the elements. The trends in conductivity of other series of glasses were also studied including glasses with added AgI and mixed Ag-Na glasses. These glasses are interesting in that the phosphorus is form

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38

Schroeder, Wade Anthony. "Conductivity Sensor Circuit." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1429537491.

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39

Casanova, Martínez Ana. "Synthetic strategies for the preparation of nanoporous carbons with improved electrical conductivity." Thesis, Orléans, 2020. http://www.theses.fr/2020ORLE3093.

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A côté d’une grande variété de concurrents tels que les métaux (nobles ou non) ou les oxydes métalliques, les carbones nanoporeux apparaissent comme des matériaux clés dans de nombreuses applications électrochimiques. Ils permettent une grande diversité d’architectures de pores contrôlées combinées à des nombreuses propriétés, en particulier, la stabilité chimique et mécanique, la biocompatibilité, une chimie de surface riche et, surtout, une conductivité électrique relativement élevée.Bien que certains carbones (comme le graphite ou le graphène) présentent des propriétés électroniques proches

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40

Yang, Fan. "Electrical and thermal properties of yttria-stabilised zirconia (YSZ)- based ceramic materials." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/electrical-and-thermal-properties-of-yttriastabilised-zirconia-ysz-based-ceramic-materials(82568afe-ffcb-4a38-9166-e5de83337763).html.

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Electrical and thermal conductivities of the yttria-stabilised zirconia/alumina (YSZ/Al2O3) composites and the yttria-zirconia-ceria (YSZ-CeO2) solid solutions are studied in this thesis. The electrical conductivity of the YSZ/Al2O3 composites decreases with an increase in the volume fraction of Al2O3 and exhibits typical percolation behaviour. The electrical conductivity of the YSZ/Al2O3 interface is higher than that of the YSZ grain boundary, but lower than that of the YSZ grains. The thermal conductivity of the YSZ/Al2O3 composites increases with an increase in the Al2O3 volume fraction, an

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41

Sasaki, Kazunari. "Phase equilibria, electrical conductivity, and electrochemical properties of ZrO₂-In₂O₃ /." Zürich, 1993. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10331.

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42

Saleem, Swilem. "Electrical conductivity measurements of strongly coupled tungsten, titanium and silver plasmas." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=96361262X.

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43

Ndegwa, Anne W. "Biodegradation and electrical conductivity of amine-contaminated soil, a laboratory study." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ65006.pdf.

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44

Carella, Catherine A. "Electrical conductivity as a surrogate for dissolved bromide stream tracer samples." Thesis, University of Colorado at Boulder, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1546530.

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<p> The coupling of the stream tracer technique with transient storage modeling is a well-established approach to characterizing solute transport processes of complex stream systems. Stream tracer studies require a large number of samples and the associated chemical analyses are costly. Sampling and analytical demand would be significantly reduced if electrical conductivity - a robust, easy-to-measure, water-quality property- was used as the primary measure of tracer breakthrough and converted to bromide tracer concentrations for breakthrough curve analysis and transient storage model paramete

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45

Jamil, Nawfal Yousif. "A study of growth, electrical conductivity and diffusion in (CdMn)Te." Thesis, University of Hull, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314717.

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46

Glover, Paul W. J. "Electrical conductivity of rock samples subjected to high temperatures and pressures." Thesis, University of East Anglia, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236438.

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The field determinations of crustal electrical conductivity/depth profiles show anomalously high conductivities in the lower crust. This has yet to be explained by a consistent theory and interpretation of field results is difficult due to the lack of laboratory conductivity measurements of saturated rocks at lower crustal temperatures. A cell was designed to measure the electrical conductivity of saturated rocks up to the lower crustal conditions of; confining pressures of 1 GPa, pore-fluid pressures of 1 GPa and temperatures of 900°C. This complex exercise required the use of a metal sleeve

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47

Veras, Johann. "Electrical Conductivity Imaging via Boundary Value Problems for the 1-Laplacian." Doctoral diss., University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6377.

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We study an inverse problem which seeks to image the internal conductivity map of a body by one measurement of boundary and interior data. In our study the interior data is the magnitude of the current density induced by electrodes. Access to interior measurements has been made possible since the work of M. Joy et al. in early 1990s and couples two physical principles: electromagnetics and magnetic resonance. In 2007 Nachman et al. has shown that it is possible to recover the conductivity from the magnitude of one current density field inside. The method now known as Current Density Impedanc

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48

Ohlendorf, Gerd, Denny Richter, Jan Sauerwald, and Holger Fritze. "High-temperature electrical conductivity and electromechanical properties of stoichiometric lithium niobate." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-192902.

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High temperature properties such as electrical conductivity (σ) and resonance behaviour of stoichiometric lithium niobate (LiNbO3) are determined in the temperature range from 20 to 950 °C. The activation energy of the conductivity is found to be 0.9 and 1.7 eV in the temperature range from 500 to 750 °C and from 800 to 950 °C, respectively. During thermal treatments in ambient air up to 950 °C and back, the conductivity remains unchanged at a given temperature, i.e., the crystal is stable under these conditions. The oxygen partial pressure (pO2) dependence of the conductivity shows two disti

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49

Amato, Alessandro. "Temperature dependence of the electrical conductivity in the quark-gluon plasma." Thesis, Swansea University, 2014. https://cronfa.swan.ac.uk/Record/cronfa42946.

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50

Amruthaluri, Sushma. "Synthesis of copper carbon nanotube composite and its electrical conductivity measurement." FIU Digital Commons, 2008. http://digitalcommons.fiu.edu/etd/1283.

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The matrices in which Multi Walled Carbon Nanotubes (MWCNTs) are incorporated to produce composites with improved electrical properties can be polymer, metal or metal oxide. Most composites containing CNTs are polymer based because of its flexibility in fabrication. Very few investigations have been focused on CNT-metal composites due to fabrication difficulties, such as achievement of homogeneous distribution of MWCNTs and poor interfacial bonding between MWCNTs and the metal matrix. In an effort to overcome poor interfacial bonding for the Cu - MWCNT composite, silver (Ag) and nickel (Ni) re

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