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Dissertations / Theses on the topic 'Electron microscopy (SEM and TEM)'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Burton, Nicholas C. "Characterisation of strain and microstructure variation in synthetic diamond by electron microscopy and cathodoluminescence." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296701.

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2

Liu, Yang. "‘Tri-3D’ electron microscopy tomography by FIB, SEM and TEM : Application to polymer nanocomposites." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0076/document.

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Ce travail a porté sur la caractérisation et la quantification en 3D de la répartition de charges de différents types (nanoparticules, nanotubes, etc.) dans des matrices polymères. Nous nous focalisons sur les techniques de tomographie en microscopie électronique. Une approche multiple en tomographie électronique a été réalisée : la tomographie en FIB/MEB (faisceau d’ions focalisé/microscope électronique à balayage), la tomographie en MEB et la tomographie en MET (microscope électronique en transmission). Les nanocomposites polymère sont généralement élaborés aux fins d’améliorer les propriété

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3

Toth-Antal, Bence Materials Science &amp Engineering Faculty of Science UNSW. "Development of copper-alumina composites for abrasive wear applications." Awarded By:University of New South Wales. Materials Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/44504.

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Copper-alumina composites were developed for testing in abrasive wear applications. The composites featured a porous continuous ceramic-preform network infiltrated by a liquid metal to form the final consolidated composite. The liquid metal phase was pure copper. Six different ceramic preform variants were tested. Ceramic volume fractions of 40, 50 and 60% were used, of two preform types; one pure-alumina, and one with additional 2wt% copper(I) oxide (CU20), functioning as an infiltration aid, the effects of which were determined in a previous study; the copper-oxide reduced infiltration pres

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4

Rivera, Felipe. "Electron Microscopy Characterization of Vanadium Dioxide Thin Films and Nanoparticles." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/2975.

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Vanadium dioxide (VO_2) is a material of particular interest due to its exhibited metal to insulator phase transition at 68°C that is accompanied by an abrupt and significant change in its electronic and optical properties. Since this material can exhibit a reversible drop in resistivity of up to five orders of magnitude and a reversible drop in infrared optical transmission of up to 80%, this material holds promise in several technological applications. Solid phase crystallization of VO_2 thin films was obtained by a post-deposition annealing process of a VO_{x,x approx 2} amorphous film sput

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5

Burke, Michelle Lynn. "An Electron Microscopy Investigation of Gold and Associated Minerals from Round Mountain, Nevada." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1438354504.

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6

Ikrényiová, Terézia. "Komplementární analýza prokaryotických buněk pomocí elektronové mikroskopie a Ramanovy spektroskopie." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-445147.

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This master thesis deals with conventional methods of bacterial cell analysis, polyhydroxyalkanoates, Raman spectroscopy and electron microscopy in the theoretical part. The production of polyhydroxybutyrate by selected thermophilic bacteria and their analysis by gas chromatography, cryogenic scanning electron microscopy and Raman spectroscopy is described in the experimental part. The chosen sample was analyzed by a transmission electron microscope. Comparing the results from previous mentioned methods it was found that the bacteria Schlegelella thermodepolymerans accumulated the highest amou

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7

Wätjen, Jörn Timo. "Microscopic Characterisation of Solar Cells : An Electron Microscopy Study of Cu(In,Ga)Se2 and Cu2ZnSn(S,Se)4 Solar Cells." Doctoral thesis, Uppsala universitet, Fasta tillståndets elektronik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-199432.

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The sun provides us with a surplus of energy convertible to electricity using solar cells. This thesis focuses on solar cells based on chalcopyrite (CIGSe) as well as kesterite (CZTS(e)) absorber layers. These materials yield record efficiencies of 20.4 % and 11.1 %, respectively. Especially for CZTS(e), the absorber layers often do not consist of one single desired phase but can exhibit areas with deviating material properties, referred to as secondary phases. Furthermore, several material layers are required for a working solar cell, each exhibiting interfaces. Even though secondary phases a

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8

Amaduci, Marcia Regina Lombardo. "Efeitos do campo eletromagnetico em celulas e bacterias." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259947.

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Orientador: Vitor Baranauskas<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-11T09:59:32Z (GMT). No. of bitstreams: 1 Amaduci_MarciaReginaLombardo_M.pdf: 2445338 bytes, checksum: 4bb1cb55957a33fb2a440282e189204d (MD5) Previous issue date: 2007<br>Resumo: Este trabalho refere-se a alguns efeitos de um campo eletromagnético aplicados em colônias bacterianas. A bactéria escolhida é bastante conhecida no mundo científico e tratase da Escherichia coli (E. coli). A parte experimental divide-se e

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9

Motylenko, Mykhaylo. "Beitrag zur Analyse von Disklinationsstrukturen in plastisch verformten Metallen." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2011. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-67416.

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Gegenstand der Arbeit ist die Analyse der bei hohen Verformungsgraden in Werkstoffen durch kollektive Bewegung der Versetzungen entstandenen neuen Defektkonfigurationen, die auf der mesoskopischen Skala agieren. Diese so genannte Disklinationen rufen neben starken Gitterdehnungen auch erhebliche lokale Gitterrotationen hervor. Es wurde der Nachweis der Existenz der Disklinationen in plastisch verformten Kristallen geliefert sowie die qualitative und quantitative Analyse der Disklinationskonfigurationen und der Disklinationsstärke durchgeführt. Die Untersuchungen an stark verformten Ein- und

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10

Jackman, Henrik. "Mechanical behaviour of carbon nanostructures." Doctoral thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-32041.

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Abstract Carbon nanotubes (CNTs) have extraordinary mechanical and electrical properties. Together with their small dimensions and low density, they are attractive candidates for building blocks in future nanoelectromechanical systems and for many other applications. The extraordinary properties are however only attained by perfectly crystalline CNTs and quickly deteriorate when defects are introduced to the structure. The growth technique affects the crystallinity where in general CNTs grown by arc-discharge are close to perfectly crystalline, while CVD-grown CNTs have large defect densities.

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11

Lu, Shifeier. "Analytical study of osteoporosis of maxilla in ovariectomized rats." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/88474/1/Shifeier_Lu_Thesis.pdf.

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The project applied analytical facilities to characterize the composition and mechanical properties of osteoporosis in maxillary bone using an ovariectomized rat model. It was found that osteoporotic jaw bone contained different amount of trace elements in comparison with the normal bone, which plays a significant role in bone quality. The knowledge generated from the study will assist the treatment of jaw bone fracture and dental implant placement.

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12

Berthier, Rémy. "Development of characterization methods for in situ annealing and biasing of semiconductor devices in the TEM." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY014/document.

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Dans cette thèse, nous abordons les défis rencontrés lors de la caractérisation des mémoires non volatiles par microscopie en transmission in situ. Les innovations récentes menées sur les porte-objets de TEM in situ basés sur l'utilisation de puces en silicium apportent de grands avantages comparée aux précédents modèles. Cependant, cette technique reste complexe et les expériences de MET in situ sont difficiles à mener à terme. Ce manuscrit tente d'apporter de nouvelles solutions pour permettre l'observation à l'échelle atomique pendant le recuit, ou la polarisation d'un échantillon dans le M

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13

Kaspar, Pavel. "Zpracování signálů z moderních mikroskopů pro lokální charakterizaci materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220056.

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Signal processing from modern microscopes for local characteristics of materials Image processing is more and more important for the advancement of image evaluation taken from microscopes. This thesis engages the problem of artefact detection and removal from images taken by electron microscope, more accurately by low energy electron microscopy (LEEM). It then offers a possible course of processing such images by edge detection and its theoretical use. These operations are all made in MatLAB language.

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14

Hujňák, Jan. "Studie materiálů pro Li-ion akumulátory pomocí elektronové mikroskopie." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413237.

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This work deals with problems of lithium-ion batteries. In the theoretical part are described electrochemical sources in general and their division. The main representatives of individual types of electrochemical sources are described in more detail. In the next part the thesis focuses specifically on lithium-ion accumulators, their history, electrochemical reactions taking place inside and materials of individual parts of which the accumulator consists. Next part focuses on electron microscopy and its division into scanning and transmission. Basic parts and the principle of operation are desc

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15

Košík, Juraj. "Determination of titanium dioxide nanoparticles in personal care products." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240803.

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Předkládaná diplomová práce se zabývá extrakcí nanočástic oxidu titaničitého z produktů osobní péče, konkrétně opalovacích krémů a následnou charakterizací těchto částic. Počet komerčně dostupných produktů s obsahem nanočástic TiO2 se neustále zvyšuje a to se sebou přináší potřebu vyhodnotit potenciální osud a nepřímou expozici TiO2 nanošástic o různých velikostí a tvarů a zkoumat jejich celý životní cyklus. Bylo zkoumáno použití ultrafiltrace a ultracentrifugace jako extrakční metody. Dvě metody pro extrakci TiO2 nanočástic byly vyvinuty a aplikovány na vzorky opalovacích krémů. Extrahované č

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16

Rima, Wael. "Apport de la microscopie electronique dans la compréhension des mécanismes d’interactions entre nanoparticules et cellules biologiques." Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0131/document.

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Parmi les nanoparticules aptes à accompagner la radiothérapie en clinique, les nanoparticules à base d’oxyde de gadolinium paraissent pertinentes, de part leur multimodalité en imagerie et leur effet radiosensibilisant prouvé in vitro et in vivo. Cet effet de radiosensibilisation est exceptionnel notamment sur des cellules cancéreuses radiorésistantes de la lignée SQ20B (carcinome squameux tête et cou) et uniquement pour des doses modérées de nanoparticules (aux alentours de 0.6 mM en Gd). Les clichés de microscopie électronique ont montré que ce maximum de radiosensibilisation est dû à une in

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17

Becerril-Garcia, Hector Alejandro. "DNA-Templated Nanomaterials." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1823.pdf.

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18

McKeown, Karen. "Using scanning electron microscopy (SEM) and transmission electron nncroscopy." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492019.

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Electron impact excitation collisions are important processes for spectral line formation of plasmas. The work undertaken in this thesis focuses on such collisions involving Li-like ions, important in both astrophysical and magnetically confined plasmas. By having reliable atomic and collisional data, such as energy levels, radiative rates and excitation rate coefficients, it is possible to generate models to describe such plasmas. The atomic data were calculated using the General-Purpose Relativistic Structure Program (GRASP; Dyall et al 1989), for several Li-like ions, namely S XIV, Ar XVI,

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19

Schellkopf, Leonard. "Investigation of Polymer Systems in Solutions with Electron Microscopy and Scattering Methods." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-167948.

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This work is focused on the visualization and thus in the aid in finding explanations for the behavior of polymer structures as they exist in solution. For this aim, preparation and imaging techniques based on cryo-TEM protocols were developed for a large variety of polymeric specimens using new commercially available devices and the results were compared with the findings of other means of structural investigations. The systems used in this work were chosen, as their investigations can be adapted to other polymer systems by slight adaptation of the preparation procedures.

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20

Vašíček, Martin. "Charakterizace autoemisních zdrojů pro elektronovou mikroskopii." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220188.

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This work deals with the theoretical foundations of electron emission into vacuum, various types of emissions, focused on the cold-emission and Schottky emission and the principle of quantum tunneling. The next part deals with the technical implementation of electron sources with a detailed study of the methodology of laboratory production of cathodes by electrochemical etching and construction of electron microscopes, using field-emission sources. This work also contains methods for measuring, processing and evaluation of electrical characteristics of emission sources.

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21

TIYYAGURA, MADHAVI. "TRANSMISSION ELECTRON MICROSCOPY STUDIES IN SHAPE MEMORY ALLOYS." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3913.

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In NiTi, a reversible thermoelastic martensitic transformation can be induced by temperature or stress between a cubic (B2) austenite phase and a monoclinic (B19') martensite phase. Ni-rich binary compositions are cubic at room temperature (requiring stress or cooling to transform to the monoclinic phase), while Ti-rich binary compositions are monoclinic at room temperature (requiring heating to transform to the cubic phase). The stress induced transformation results in the superelastic effect, while the thermally induced transformation is associated with strain recovery that results in the sh

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22

Karlsson, Linda. "Transmission Electron Microscopy of 2D Materials : Structure and Surface Properties." Doctoral thesis, Linköpings universitet, Tunnfilmsfysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-127526.

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During recent years, new types of materials have been discovered with unique properties. One family of such materials are two-dimensional materials, which include graphene and MXene. These materials are stronger, more flexible, and have higher conductivity than other materials. As such they are highly interesting for new applications, e.g. specialized in vivo drug delivery systems, hydrogen storage, or as replacements of common materials in e.g. batteries, bulletproof clothing, and sensors. The list of potential applications is long for these new materials. As these materials are almost entire

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23

Lai, Pooi-fun. "TEM and structural investigations of synthesized and modified carbon materials /." Connect to thesis, 1999. http://eprints.unimelb.edu.au/archive/00000770.

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24

Sharp, Joanne. "Electron tomography of defects." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/228638.

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Tomography of crystal defects in the electron microscope was first attempted in 2005 by the author and colleagues. This thesis further develops the technique, using a variety of samples and methods. Use of a more optimised, commercial tomographic reconstruction program on the original GaN weak beam dark-field (WBDF) tilt series gave a finer reconstruction with lower background, line width 10-20 nm. Four WBDF tilt series were obtained of a microcrack surrounded by dislocations in a sample of indented silicon, tilt axes parallel to g = 220, 220, 400 and 040. Moiré fringes in the defect impaired

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25

Wan, Qian. "Transmission electron microscopy study of heterostructures grown on GaAs (110)." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://dx.doi.org/10.18452/16949.

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In der Arbeit werden die mikrostrukturellen Eigenschaften von an (110)-Flächen orientierten Heterostrukturen auf GaAs-Substraten mittels verschiedener Techniken der Transmissionselektronenmikroskopie untersucht. Kubisch flächenzentrierte (Al,Ga)As/AlAs/GaAs Mehrschichtstrukturen auf GaAs(110) weisen in orthogonalen Richtungen parallel zur Substratoberfläche verschiedene Mechanismen zur Aufnahme der Verspannungen aufgrund von Fehlanpassungen auf. Defektfreie Strukturen sind durch eine geeignete, kurz periodische AlAs/GaAs-Überstruktur erfolgreich realisiert worden. Abschließend sind künstliche

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26

Xin, Renlong. "TEM studies of calcium phosphates for the understanding of biomineralization /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MECH%202006%20XIN.

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27

Asaulenko, L. G., L. M. Purish, and D. R. Abdulina. "Use of the Transmission Electron Microscopy for Examination of Biofilms Structure." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35267.

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Combination of transmission electron microscopy technics with colloidal gold labeled lectin staining allowed investigating glycoconjugates in biofilms of the corrosion relevant bacteria. Lectins with the same specificity were found to express different affinity to the compounds of the bacterial biofilms. LBA lectin showed the highest binding capacity to N-acetyl-D-galactosamine in Desulfovibrio sp. 10 and Bacillus subtilis 36 biofilms. For the assessment of N-acetyl-D-glucosamine presence in Bacillus subtilis 36 and Pseudomonas aeruginosa 27 biofilms WGA lectin was the most efficient. Sta

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28

Waechtler, Thomas, Steffen Oswald, Nina Roth, et al. "Copper Oxide Films Grown by Atomic Layer Deposition from Bis(tri-n-butylphosphane)copper(I)acetylacetonate on Ta, TaN, Ru, and SiO2." Universitätsbibliothek Chemnitz, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200900734.

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The thermal atomic layer deposition (ALD) of copper oxide films from the non-fluorinated yet liquid precursor bis(tri-n-butylphosphane)copper(I)acetylacetonate, [(<sup>n</sup>Bu<sub>3</sub>P)<sub>2</sub>Cu(acac)], and wet O<sub>2</sub> on Ta, TaN, Ru and SiO<sub>2</sub> substrates at temperatures of < 160°C is reported. Typical temperature-independent growth was observed at least up to 125°C with a growth-per-cycle of ~ 0.1 Å for the metallic substrates and an ALD window extending down to 100°C for Ru. On SiO<sub>2</sub> and TaN the ALD window was observed between 110 and

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29

Lozano-Perez, Sergio. "TEM crack tip investigations of SCC." Thesis, University of Oxford, 2002. http://ora.ox.ac.uk/objects/uuid:7e503ff9-782a-4f74-b184-dddaa96e03e2.

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Over the last few years, TEM has become a powerful technique to study cracks and specially crack tips. However, the number of publications including TEM results has not grown as it was expected. The main reason for this might be difficulties in the sample preparation. In this work we present a novel FIB sample preparation technique which has proved to be an ideal tool for preparing cross sectional samples containing crack tips. The morphology of intergranular stress corrosion cracking (IGSCC) has been investigated in Alloy 600 subjected to constant load and slow strain rate tests in simulated

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Caballero-Alias, Ana Maria. "The role of silica in mineralising tissues." Thesis, Nottingham Trent University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302515.

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31

Liu, Yangmingyue. "Scanning Electron Microscopy To Probe Working Nanowire Gas Sensors." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1256.

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This study is dedicated to the implementing of Electron-Beam-Induced Current (EBIC) microscopy to study the behavior of metal oxide semiconducting (MOS) nanowire (NW) gas sensor in situ under exposure to different environment. First, we reported the development of a single nanowire gas sensor compatible with an environmental cell. The major component of the device we use in this study is a single SnO2 nanowire attached to an electron transparent SiN membrane (50-100 nm thick), which was used for mounting nanowire working electrodes and surface imaging of NW. First the NW's conductivity is inve

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32

Agnese, Fabio. "Advanced transmission electron microscopy studies of semiconductor nanocrystals synthesized by colloidal methods." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY043/document.

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Les recherches sur les nanocristaux semiconducteur (NCs) ont conduit à des résultats scientifiques fascinants, spécialement pour l'application en dispositifs optoelectroniques. Afin de répondre à certaines exigences comme des coûts mineurs, des gains d'efficacité, des composants respectueux de l'environnement, etc., des nouvelles méthodes sont explorées: dans les procédés en solution, dans l'ingénierie de bande et des niveaux d'énergie. En particulier, la méthode de synthèse peut influencer les propriétés optoélectroniques. Par conséquent, une meilleure compréhension des facteurs complexes pen

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33

Ayele, Yohannes Haileyesus. "Region-Based Contrast Transfer Function correction for Electron Microscopy Images." Thesis, KTH, Skolan för teknik och hälsa (STH), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119305.

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Electron crystallography is one of the methods for determining the structure of membrane proteins. However, the resolution that we get from electron crystallography of membrane proteins is limited by crystal disorder and inaccurate determination of contrast transfer function (CTF) parameters. To overcome these problems, we applied single particle refinement with local averaging for long range variation of the crystals and local region-based CTF correction for the tilted images. These two corrections are done on the Melibiose Permease (MelB) data sets and a resolution of 8.6Å is reported.<br>El

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34

York, Greg Allen. "TEM/EDXS studies of phase separation in block and graft copolymers." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80085.

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The relationships between molecular parameters and microdomain formation of a variety of block- and graft-copolymers were studied by Transmission Electron Microscopy (TEM). Molecular variables included chemical composition: dimethyl-, fluoropropyl and diphenyl-siloxane , sulfone styrene, paramethylstyrene, t-butylstyrene, arylester and methyl methacrylate, as well as molecular weight and distribution. Effects of the kinetics of phase-separation were also determined . Thick (approximately lmm) films cast from solvent showed more complete phase separation than either thin (about 10nm) cast films

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Melichárek, Václav. "Návrh manipulátoru pro TEM." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417138.

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The topic of this master’s thesis is the design of a sample manipulator for TEM. Regarding which the segment of the sample manipulator used to move the sample in the direction of the x-axis (so-called x-stage) was designed. The introductory theoretical part is concerned with a brief description of transmission electron microscopy focused on the imaging methods used in TEM and the procedures of preparing and loading TEM samples. The theoretical part follows with the design of precise mechanisms, especially with respect to the inaccuracies of their operation and the technological aspect of the d

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36

Ornek, Cem. "Performance characterisation of duplex stainless steel in nuclear waste storage environment." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/performance-characterisation-of-duplex-stainless-steel-in-nuclear-waste-storage-environment(4db73e9b-c87c-40a6-9778-0b823b1c499f).html.

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The majority of UK’s intermediate level radioactive waste is currently stored in 316L and 304L austenitic stainless steel containers in interim storage facilities for permanent disposal until a geological disposal facility has become available. The structural integrity of stainless steel canisters is required to persevere against environmental degradation for up to 500 years to assure a safe storage and disposal scheme. Hitherto existing severe localised corrosion observances on real waste storage containers after 10 years of exposure to an ambient atmosphere in an in-land warehouse in Culham

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37

Jenei, István Zoltán. "Scanning electron microscopy (SEM) analysis of tribofilms enhanced by fullerene-like nanoparticles." Licentiate thesis, Stockholms universitet, Fysikum, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-82153.

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The beneficiary effects of WS2 inorganic fullerene-like nanoparticles in the lubrication industry were shown in recent years. The incorporation of the nanoparticles into lubricants (oils, greases) is however not straightforward. When two surfaces are sliding against each other and a lubricant is used, a thin layer (tribofilm) is formed on the contact area, which effects the friction process. Lubricants usually contain several additives. These additives can impair the friction reducing behaviour of the WS2 inorganic fullerene-like nanoparticles. This thesis investigates the effects of several a

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MacDonald, Kinsey Elizabeth. "Analysis of Frozen Desserts Using Low-Temperature Scanning Electron Microscopy (LT-SEM)." Thesis, Clemson University, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10982077.

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<p> Commercial vanilla ice cream and other frozen desserts from the United States were analyzed for ice crystal length using low-temperature scanning electron microscopy (LT-SEM). Average ice crystal length was determined using multiple micrographs of each sample/product. Out of the products tested, 11 out of 15 samples had an average ice crystal length above the consumer sensory threshold limit of 55 µm. Products containing stabilizers tended to have smaller average ice crystal lengths than products without stabilizers. With a few exceptions, lower fat products tended to have larger ice

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Nukala, Haritha. "QUANTITATIVE THICKNESS MAPPING IN HIGH-ANGLE ANNULAR DARK-FIELD (HAADF) SCANNING TRANSMISSION ELECTRON MICROSCOPY (STEM)." Master's thesis, University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4292.

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Only a few methods are currently available for the measurement of sample thicknesses in Transmission Electron Microscopy (TEM). These methods, Convergent-Beam Electron Diffraction (CBED) and thickness mapping in Energy-Filtered TEM (EFTEM), are either elaborate or complex. In this present work, I have investigated and come up with a simple straight-forward method to measure the local thickness of a TEM sample with the atomic number (Z-contrast) imaging using High-Angle Annular Dark Field (HAADF) Scanning Transmission Electron Microscopy (STEM). HAADF STEM shows atomic number contrast for high

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Gill, Yasir Q. "Preparation and characterization of polyethylene based nanocomposites for potential applications in packaging." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/18052.

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The objective of my work was to develop HDPE clay nanocomposites for packaging with superior barrier (gas and water) properties by economical processing technique. This work also represents a comparative study of thermoplastic nanocomposites for packaging based on linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and Nylon12. In this study properties and processing of a series of linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and Nylon 12 nanocomposites based on Na-MMT clay and two different aspect ratio grades of kaolinite clay are discussed.

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Cardoch, Sebastian. "Studying Atomic Vibrations by Transmission Electron Microscopy." Thesis, Uppsala universitet, Materialteori, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-305370.

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We employ the empirical potential function Airebo to computationally model free-standing Carbon-12 graphene in a classical setting. Our objective is to measure the mean square displacement (MSD) of atoms in the system for different average temperatures and Carbon-13 isotope concentrations. From results of the MSD we aim to develop a technique that employs Transmission Electron Microscopy (TEM), using high-angle annular dark filed (HAADF) detection, to obtain atomic-resolution images. From the thermally diffusive images, produced by the vibrations of atoms, we intent to resolve isotopes types i

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Tyborowski, Tobias. "Determining the interwall spacing in carbon nanotubes by using transmission electron microscopy." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-45754.

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The interwall spacing of multi-walled carbon nanotubes has an effect on their physical and chemical properties. Tubes with larger interwall spacing - compared to the spacing where the carbon atoms are in their natural distance to each other - are for instance expected to be mechanically less stable. Considering the MWCNT interwall spacing’s dependence on the tube size, three interesting previous studies with slightly different conclusions can be found. All of them conclude an increase of the interwall spacing with a decreasing tube size. We describe their analysis procedure, compare them to ea

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Barrett, Heather A. "A COMPARATIVE TRANSMISSION ELECTRON MICROSCOPY INVESTIGATION OF DEFECTS AND TEXTURES IN CRYPTOMELANE." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1375787636.

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Hrubanová, Kamila. "Scanning Electron Microscopy and its Applications for Sensitive Samples." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-409082.

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Předložená dizertační práce s názvem “Rastrovací elektronová mikroskopie a její aplikace pro senzitivní vzorky” pojednává o problematice rastrovací elektronové mikroskopie v kontextu instrumentálního a metodologického vývoje vedoucího k inovativnímu řešení, které je dobře aplikovatelné zejména v mikrobiologickém výzkumu. Součástí práce je rozprava o historii a současném stavu elektronové mikroskopie (EM) jakožto vědecké zobrazovací a analytické techniky, tato část se nachází v úvodních kapitolách. Nepopiratelný přínos EM v biologických a lékařských oborech je dokazován mnoha citovanými vědecký

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Barbieri, Francesco. "INVESTIGATING THE FUNCTIONAL MORPHOLOGY OF IN SITU IFT TRAINS BY CORRELATIVE LIGHT-ELECTRON MICROSCOPY." Doctoral thesis, Università di Siena, 2018. http://hdl.handle.net/11365/1052316.

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Cilia and flagella are cellular organelles involved in several and crucial aspects for the cell, tissue and organs normal physiology. Cilia can be classified according to their ability to perform a movement or not. Eukaryotic unicellular organisms and particular cells of mostly evolved organisms, i. e. spermatozoa, have evolved motile cilia for the cell propulsion in liquid media. Ciliated epithelia direct the movement of fluids by the ciliary beating. The primary cilium is an immotile cilium present in all the so far studied metazoan. This organelle is ubiquitous in human somatic cells when t

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Narangifard, Ali. "The multislice method in transmission electron microscopy simulation : An implementation in the TEM-simulator software package." Thesis, KTH, Skolan för teknik och hälsa (STH), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134189.

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This report introduces the multislice method for modeling the interaction between an electron and the atoms in the specimen (electron-specimen interaction). The multislice method is an approximation to the full quantum mechanical model for this interaction. After introducing the theory, we discuss how the multislice method is implemented and integrated into TEM-simulator, a software for simulation of Transmission Electron Microscope (TEM) images.

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Jabeen, Fauzia. "III-V semiconducting nanowires by molecular beam epitaxy." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3097.

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2007/2008<br>This thesis is devoted to the study of the growth of III-V nanowires (NWs) by catalyst assisted and catalyst free molecular beam epitaxy (MBE). The nanostructures have been routinely characterized by scanning electron microscopy (SEM) and, to a minor extent by transmission electron microscopy (TEM). X-ray photoemission spectroscopy (XPS), scanning photoemission microscopy (SPEM), extended X-ray absrorption fi ne structure analysis (EXAFS), photoluminescence (PL) and trans- port measurements have given an important contribution on specifi c topics. The first section of this t

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Alghamdi, Reema M. "A SEM Study Of Copper Corrosion In Bowling Green Supply Lines." TopSCHOLAR®, 2015. http://digitalcommons.wku.edu/theses/1550.

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Recently, the rate of corrosion of copper water pipes in Bowling Green, Kentucky has unexpectedly accelerated. The specific reasons for this are unknown. Our aim is to elucidate the factors enhancing the corrosion and help understand the primary mechanisms of action. This will help in combating and reducing future corrosion incidents leading to pipe failure, thus reducing losses experienced when these pipes are replaced. This study seeks to explore the characteristics and factors involved. The scanning electron microscopy was used to obtain elemental composition, and images of both inside and

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Stoll, Joshua D. "Graphene Membranes as Electron Transparent Windows for Environmental Spectroscopy and Microscopy." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/917.

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A methodology was developed for isolation and transfer of 1-4 monolayer graphene from both Cu and Ni foil and Ni/SiO2/Si layered substrate types for use as electron transparent windows in environmental electron microscopy and spectroscopy. The graphene membranes were transferred onto disc "frames" made of stainless steel containing 3-10 μm diameter apertures. Such frames "windowed" with the graphene membrane are assembled into the custom designed environmental cell (e-cell) which contain a specimen immersed in the desired liquid or gaseous environment, and are compatible for imaging with a con

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Romano, Rodríguez Albert. "TEM techniques for the development of ULSI technology." Doctoral thesis, Universitat de Barcelona, 1991. http://hdl.handle.net/10803/667698.

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In the last decade transmission electron microscopy (TEM) has become one of the most powerful tools for the structural characterization of crystalline materials. Especially in the field of microelectronics development and production, the information obtained by this analytical tool has been of vital importance for the improvement of the different processing steps. With the reduction of the dimensions of the devices TEM is the only technique that can give information with enough spatial resolution. In this work applications of transmission electron microscopy for the study of processing step

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