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Dissertations / Theses on the topic 'Nano- and Microstructures'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Fon, Warren Chung Wah Cross Michael Clifford. "Thermal properties of nano- and microstructures /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-05262004-123035.

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2

Tolley, Robert Douglas. "Charge Transport in Nano-Constrictions and Magnetic Microstructures." Miami University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=miami1344095174.

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3

Wang, X., Q. Zheng, S. Dong, Ashraf F. Ashour, and B. Han. "Interfacial characteristics of nano-engineered concrete composites." Elsevier, 2020. http://hdl.handle.net/10454/17954.

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Yes<br>This study investigates the interfacial characteristics between aggregates and cement paste matrix in nanofillers modified concrete. A three-point bend test on the specimens composed of two pieces of aggregates bonded with a thin layer of cement pastes with/without nanofillers was carried out to characterize the interfacial bond strength of the composites. The scanning electron microscope observations and energy dispersive x-ray spectrometry analysis were also performed to characterize the interfacial microstructures and compositions of the composites. The experimental results indicated

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4

Gordin, Ari. "Shape-preserving physical and chemical transformations of Si and SiO₂ nano- and microstructures." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54026.

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This thesis considers two broad categories of shape-preserving transformations: physical transformations, in which the chemistry of the as-grown material remains constant but some structural change is introduced (i.e., conversion of dense silicon nanowires into porous silicon nanowires); and chemical transformations, in which the physical structure of the as-grown material remains constant but the chemical composition is changed (i.e., conversion of SiO2 photonic crystal fibers into MgF¬2 photonic crystal fibers). Part I of this thesis focuses on the development of a process which allows for

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5

Huang, Liyie. "Caractérisation et propriétés nanomécaniques des différents films DLC (diamond-like carbon)." Troyes, 2002. http://www.theses.fr/2002TROY0001.

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Cette étude porte sur les films DLC (diamond-like carbon). La charge critique lors d'un test de rayure augmente avec l'épaisseur inter-couche. Pour une épaisseur inter-couche donnée, la charge critique varie linéairement avec la dureté du film et son épaisseur. Le bas coefficient de frottement viendrait de la combinaison de la dureté élevée, de la faible rugosité et de la faible proportion de sp3. Dans le cas du fretting, le coefficient de frottement et l'humidité relative varient inversement. La proportion de sp3 augmente avec l'introduction de Si, ce qui fait monter la dureté, diminuer les f

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6

Lutsyk, V. I., and V. P. Vorobeva. "Reasons for Contradiction of T-X-Y Diagram Au-Bi-Sb in “Atlas of Phase Diagrams for Lead-Free Soldering”." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35472.

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The paper describes how 3D computer models of phase diagrams may be used for searching and correction of mistakes in projections and sections of phase diagrams, designed by known thermodynamic methods. The system Au-Bi-Sb from the Atlas of Phase Diagrams for Lead-Free Soldering is an example to demonstrate searching of mistakes and reconstruction of missing surfaces and phase regions with a help of 3D computer model of its T-x-y diagram. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35472

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7

Bardet, Matthieu. "Elaboration de matériaux composites à matric Titane et à nano-renforts TiC et TiB par différents procédés de métallurgie des poudres : frittage par hydruration/dehydruration et déformation plastique sévère (Equal Channel Angular Pressing (ECAP))." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0026/document.

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Les composites à matrice Titane avec des renforts nanométriques présente des améliorations intéressantes quant aux propriétés mécaniques, sans affecter la ductilitédu matériau. Ce travail de thèse se concentre sur l’élaboration et la caractérisation dematériaux composites de Titane obtenus par deux différents procédés de métallurgie despoudres : La densification par déformation plastique sévère utilisant l’ECAP (Equal ChannelAngular Pressing) et les procédés de frittage par hydrogénation/déshydrogénation (HDH).L’ECAP est un procédé de densification rapide utilisant la déformation plastique des

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8

Liu, Chao Yuan. "Analyse quantitative des propriétés mécaniques de fraises dentaires rotatives en NiTi et étude de la fabrication de larges microstructures par polymérisation induite à deux photons." Phd thesis, Université de Grenoble, 2014. http://tel.archives-ouvertes.fr/tel-01071805.

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Un tiers des urgences dentaires et un pourcentage élevé de maux de dents sont endodontie liés. Instruments rotatifs utilisés dans le traitement endodontique peuvent se briser à l'intérieur du canal radiculaire en raison de la fatigue des matériaux. Une fois cassé, l'extraction de la partie fracturée du canal est un travail difficile et ennuyeux de le patient et le dentiste. Par conséquent, l'alerte d'une fracture imminente lors de l'utilisation clinique ou développer de bonnes stratégies pour augmenter ses propriétés mécaniques sera d'une grande aide pour éviter les complications médicales / j

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9

Patryarcha, Lukas [Verfasser]. "Experiments and simulations on the structural and electrical properties of nano- and microstructures on graphite surfaces produced by ion beam lithography / Lukas Patryarcha." Dortmund : Universitätsbibliothek Technische Universität Dortmund, 2011. http://d-nb.info/1018124373/34.

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10

Kaymak, Vural [Verfasser], Alexander [Akademischer Betreuer] Pukhov, Alexander [Gutachter] Pukhov, Carsten [Gutachter] Müller, and Malte [Gutachter] Kaluza. "Ultrahigh energy density physics and ion acceleration in nano- and microstructures / Vural Kaymak ; Gutachter: Alexander Pukhov, Carsten Müller, Malte Kaluza ; Betreuer: Alexander Pukhov." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2019. http://d-nb.info/1201881927/34.

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11

Kaymak, Vural [Verfasser], Alexander [Akademischer Betreuer] Pukhov, Alexander [Gutachter] Pukhov, Carsten [Gutachter] Müller, and Malte [Gutachter] Kaluza. "Ultrahigh energy density physics and ion acceleration in nano- and microstructures / Vural Kaymak ; Gutachter: Alexander Pukhov, Carsten Müller, Malte Kaluza ; Betreuer: Alexander Pukhov." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2020. http://d-nb.info/1205544151/34.

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12

Arrabito, Giuseppe Domenico. "Micro and Nano patterns for Biosensing: from enzymatic assays to single cells interaction arrays." Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/975.

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In this thesis work, solution dispensing techniques have been employed for the realization of complex biological arrays. Inkjet printing techniques were employed for the generation of drug screening platforms. This approach was initially proved with a model enzyme system like Glucose Oxidase substrate covalently linked to a functionalized silicon oxide support. On this support an enzymatic substrate (D-glucose)/inhibitor (D-glucal) couple was accurately dispensed. A simple optical detection method was used to prove the screening capability of the microarray with the possibility to assay with h

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13

Riaz, Adeel. "Conception, optimisation et caractérisation avancée de nouvelles microstructures d'électrodes pour piles à oxydes solides." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALI006.

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Les piles à oxyde solide (SOCs selon l’acronyme anglais de Solid Oxide Cells) sont des dispositifs électrochimiques de conversion d’énergie pouvant fonctionner en mode pile à combustible (SOFC) pour convertir un combustible en énergie électrique et inversement en mode électrolyseur (SOEC). Les piles à oxyde solide sont des dispositifs constitués de céramiques avec une électrolyte à oxyde solide dense capable de conduire des ions oxygène négatifs et intercalée entre deux électrodes. Cette thèse se concentre sur l'optimisation de l'électrode à oxygène et la caractérisation avancée de films mince

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14

Roumiguier, Lena. "Frittage par Spark Plasma Sintering de céramiques de carbure de bore : modélisation numérique du procédé et optimisation des nano-,microstructures pour l’amélioration des performances des absorbants en réacteurs à neutrons rapides." Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0109.

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Cette étude a pour objectif d’élaborer de nouveaux matériaux de carbure de bore utilisés en tant qu’absorbants neutroniques en réacteurs à neutrons rapides. La stratégie adoptée vise l’affinement de la microstructure des matériaux afin de limiter le phénomène de déformation anisotropique des grains sous irradiation qui est responsable de la dégradation des pastilles en fonctionnement. Deux nuances de matériaux ont été élaborées par le procédé SPS avec des microstructures submicroniques et nanométriques, permettant une diminution des tailles de grains par rapport au matériau de référence histor

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15

Thual, Marc-Antoine. "Effet de l'oxygène et de l'yttrium sur la nanoprécipitation et sur la recristallisation dans un alliage ODS Fe-14Cr." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS521/document.

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Les alliages ferritiques Fe—14Cr renforcés par une dispersion d'oxydes (ODS) riches en Y, Ti et O sont envisagés comme matériaux de structure pour la prochaine génération de réacteurs nucléaires. Ils allient résistance à l’irradiation neutronique et excellentes propriétés mécaniques, notamment en fluage à hautes températures. Ce travail s'est positionné sur la compréhension des effets induits par de légères variations en oxygène et en yttrium autour d’une composition chimique de référence Fe—14Cr—1W—0,3Ti—0,3Y₂O₃. Nous avons montré que le paramètre crucial est la cinétique de précipitation des

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16

Olaru, Maria Alexandra [Verfasser]. "Dynamic NMR of nano- and microstructured materials / Maria Alexandra Olaru." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/1046633023/34.

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17

Liu, Jing. "Nano and Grain-Orientated Ferroelectric Ceramics Produced by SPS." Doctoral thesis, Stockholm : Department of Physical, Inorganic and Structural Chemistry, Stockholm university, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-6800.

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18

Mammen, Lena [Verfasser]. "Controlled wetting on silica-based nano- and microstructured surfaces / Lena Mammen." Mainz : Universitätsbibliothek Mainz, 2015. http://d-nb.info/1076186890/34.

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19

Praud, Mathilde. "Plasticité d'alliages renforcés par nano-précipitation." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/2049/.

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Dans le cadre du développement des réacteurs à neutrons rapides refroidis au sodium (RNR-Na) pour la quatrième génération de réacteurs nucléaires, les aciers renforcés par une dispersion d'oxydes nanométriques (Oxide Dispersion Strengthened, ODS) sont envisagés comme matériaux de gainage du combustible. Ils présentent en effet une bonne stabilité dimensionnelle sous irradiation grâce à leur structure cubique centrée, ainsi que d'excellentes propriétés en fluage thermique grâces aux nano-renforts. L'objectif de cette thèse est de comprendre les mécanismes de plasticité de tels matériaux à haute

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20

Lee, Jim 1963. "Microstructure and properties of zinc oxide nano-crystalline thin films and composites." Thesis, University of Auckland, 2006. http://hdl.handle.net/2292/2136.

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Zinc oxide (ZnO) is a II–VI compound semiconductor with a wide direct band-gap of 3.3 eV and a hexagonal structure. ZnO is often used in the paint, paper, rubber, food and drug industries. It is also a promising material in nanotechnology applications, for example in nano-electronics and nano-robotic technology. With its wide band-gap, high exciton binding energy and high breakdown strength, ZnO can be utilized for electronic and photonic devices, as well as for high-frequency applications. To produce such optoelectronic devices, control of electronic properties, such as the nature of conducti

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21

Vüllers, Felix [Verfasser]. "Bioinspired Superhydrophobic Nano- and Microstructured Surfaces for Drag Reduction and Optoelectronics / Felix Vüllers." Karlsruhe : KIT Scientific Publishing, 2018. http://www.ksp.kit.edu.

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22

Xiao, Xiaoling, and S3060677@student rmit edu au. "Characterization of nano-structured coatings containing aluminium, aluminium-nitride and carbon." RMIT University. Applied Sciences, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20081217.100453.

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There is an every increasing need to develop more durable and higher performing coatings for use in a range of products including tools, devices and bio-implants. Nano-structured coatings either in the form of a nanocomposite or a multilayer is of considerable interest since they often exhibit outstanding properties. The objective of this thesis was to use advanced plasma synthesis methods to produce novel nano-structured coatings with enhanced properties. Coatings consisting of combinations of aluminum (Al), aluminum nitride (AlN) and amorphous carbon (a-C) were investigated. Cathodic vacuum

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23

Zhang, Jiali [Verfasser]. "Microstructure Design via Site-specific Control of Recrystallization and Nano-precipitation / Jiali Zhang." Aachen : Shaker, 2016. http://d-nb.info/1118258495/34.

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24

Mahadevegowda, Amoghavarsha. "Processing, microstructure and properties of polymer-based nano-composite dielectrics for capacitor applications." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:fb974b13-2ec5-4104-9f80-45d1cb97eb48.

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The processing and properties of novel polymer-based nano-composite (PNC) dielectrics for capacitor applications has been studied. PNCs were fabricated via a vacuum based deposition technique and their micro/nano-structure, chemical and dielectric properties investigated. After process development and optimisation, co-deposited Al and nylon-6 PNCs had a dielectric constant k&sim;7 at an approximate Al volume fraction of 0.3 that agreed with analytical predictions if it was assumed that the Al transformed to an oxide in-situ and/or after deposition. The significant effect of absorbed water vapo

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25

Madiba, Itani Given. "Thermochromic properties of VO2 nano-coatings by inverted cylindrical magnetron sputtering." Thesis, University of the Western Cape, 2012. http://hdl.handle.net/11394/4381.

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>Magister Scientiae - MSc<br>Vanadium dioxide (VO2) films have been known as the most feasible thermochromic nano-coatings for smart windows which self control the solar radiation and heat transfer for energy saving and comfort in houses and automotives. Such an attractive technological application is due to the fact that VO2 crystals exhibit a fast semiconductor-to-metal phase transition at a transition temperature TM of about 68°C, together with sharp optical changes from high transmitive to high reflective coatings in the IR spectral region. The phase transition has been associated to the n

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Toker, Sidika Mine. "An Investigation Of Microstructure, Microhardness And Biocompatibility Characteristics Of Yttrium Hydroxyapatite Doped With Fluoride." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611540/index.pdf.

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The aim of this study was to investigate the microstructure, microhardness and biocompatibility properties of nano hydroxyapatite (HA) doped with a constant yttrium (Y3+) and varying fluoride (F-) compositions. HA was synthesized via precipitation method and sintered at 1100&amp<br>#61616<br>C for 1 hour. Increased densities were achieved upon Y3+ doping while F- doping led to a decrease in densities. For structural analysis, XRD, SEM and FTIR spectroscopy examinations were performed. No secondary phases were observed in XRD studies upon doping. Lattice parameters decreased due to substitution

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27

Ross, Francis L. (Francis LaFayette) 1968. "Nano-cellular microstructure evolution in ion-induced chemical vapor deposition (II-CVD) of copper." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29971.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2003.<br>Includes bibliographical references (p. 179-181).<br>A systematic investigation of the microstructure produced in ion-induced chemical vapor deposition (11-CVD) of copper from copper(I)hexafluoroacetylacetonatevinyltrimethylsilane (Cu(I)hfacVTMS) gas precursor is reported. II-CVD involves the ion-driven decomposition of Cu(l)hfacVTMS and subsequent deposition of copper films at ambient temperature. The thin films were grown with the aid of a broad beam Kaufman source in a "multibeam app

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28

Mridha, Sanghita. "Structure Evolution and Nano-Mechanical Behavior of Bulk Metallic Glasses and Multi-Principal Element Alloys." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc984260/.

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Bulk metallic glasses and multi-principal element alloys represent relatively new classes of multi-component engineering materials designed for satisfying multiple functionalities simultaneously. Correlating the microstructure with mechanical behavior (at the microstructural length-scales) in these materials is key to understanding their performance. In this study, the structure evolution and nano-mechanical behavior of these two classes of materials was investigated with the objective of fundamental scientific understanding of their properties. The structure evolution, high temperature nano-m

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Latkiewicz, Michał. "Influence of microstructure on corrosion behaviour of electrodeposited micro and nano-crystalline cobalt-molybdenum alloys." Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCK066.

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De nombreux secteurs industriels ont besoin de matériaux métalliques avec des propriétés de résistance à l'usure et de résistance à la corrosion dans des environnements agressifs ou à des températures élevées très élevées. Ces propriétés spécifiques, notamment mécaniques, électriques, magnétiques et optiques, peuvent être obtenues par la production de couches métalliques. Les revêtements d’alliage ou de métal nanocristallin offrent les caractéristiques de performance souhaitées.L'électrodéposition est un procédé largement utilisé pour fabriquer des revêtements sur des substrats métalliques. La

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Chen, Yandong. "Microstructure and Electronic Structures of Er-Doped Si Nano-particles Synthesized by Vapor Phase Pyrolysis." Thesis, University of North Texas, 2000. https://digital.library.unt.edu/ark:/67531/metadc2476/.

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Si nanoparticles are new prospective optoelectronic materials. Unlike bulk Si cry-stals, Si nanoparticles display intriguing room-temperature photoluminescence. A major challenge in the fabrication of Si nanoparticles is the control of their size distribution. The rare-earth element Er has unique photo emission properties, including low pumping power, and a temperature independent, sharp spectrum. The emission wavelength matches the transmission window of optical fibers used in the telecommunications industry. Therefore, the study of Er-doped Si nanoparticles may have practical significance.

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31

Zolriasatein, A., A. Shokuhfar, and M. Alzamani. "Effect of Nano-Al3Mg2 Addition on the Microstructure of PEEK Nanocomposite Bulk Samples Consolidated from Mechanically Milled Powders." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35127.

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In this investigation, the effect of the novel nano-Al3Mg2 particles addition on the microstructure of polyetheretherketone (PEEK) polymer matrix nanocomposite was studied. Bulk nanocomposite samples were fabricated by consolidation of ball milled composite powders through hot pressing method. The structural evolutions of mechanically milled powders as well as consolidated nanocomposites were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with an energy dispersive X-ray analyzer (EDX). The results showed that, although increasing the amount of β-Al3Mg2

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Mokhtari, Morgane. "FeCr composites : from metal/metal to metal/polymer via micro/nano metallic foam, exploitation of liquid metal dealloying process." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI088/document.

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Les métaux micro ou nanoporeux sont très attrayants notamment pour leur grande surface spécifique. Le désalliage dans un bain de métal liquide permet une dissolution sélective d'une espèce chimique (l'élément soluble) à partir d'un alliage d'origine (le précurseur) composé de l'élément soluble et d'un élément cible (qui deviendra nano/micro poreux) non soluble dans le bain de métal liquide. Quand le précurseur est plongé dans le bain de métal liquide, à son contact, l'élément soluble va se dissoudre dans le bain tandis que l'élément cible va en parallèle se réorganiser spontanément afin de for

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Nauyoks, Stephen Edwin. "Microstructure of nano and micron size diamond-SIC composites sintered under high pressure high temperature conditions." [Fort Worth, Tex.] : Texas Christian University, 2009. http://etd.tcu.edu/etdfiles/available/etd-10152009-102152/unrestricted/Nauyoks.pdf.

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Belkacemi, Lisa Thinhinane. "Effet du flux d’irradiation sur la formation de nano-défauts dans des alliages ferritiques Fe-Ni et Fe-Mn." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS441/document.

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La fragilisation des aciers de cuve des réacteurs nucléaires sous irradiation aux neutrons est le facteur limitant la durée de vie des centrales nucléaires françaises. Ceci est dû au mouvement des dislocations qui se trouve être entravé par des amas de Cu, P, Si, Mn et Ni. Plus particulièrement, les amas induits de Mn et de Ni sont à l'origine d'un durcissement significatif à forte dose. Afin de prédire la dégradation des propriétés mécaniques, les expériences sont généralement réalisées à l'aide d'accélérateurs de particules. Cependant, les flux d'irradiation atteints sont compris entre 10⁻⁴

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Dong, S., Y. Wang, Ashraf F. Ashour, B. Han, and J. Ou. "Nano/micro-structures and mechanical properties of ultra-high performance concrete incorporating graphene with different lateral sizes." Elsevier, 2020. http://hdl.handle.net/10454/17889.

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Yes<br>The performance of cement-based materials can be controlled and tailored by adjusting the characteristics of reinforced nano inclusions. Therefore, the lateral size effect of graphene on the nano/micro-structures of ultra-high performance concrete (UHPC) was explored, and then the mechanical properties were investigated to analyze the structure–property correlation of composites in this paper. The test results show that due to nucleation site effect and the formation of core–shell elements, incorporating graphene with lateral size of > 50 µm improves the polymerization degree and mean m

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MOTTA, MARCELO SENNA. "IN-SITU REDUCTION SYNTHESIS AND MICROSTRUCTURAL CHARACTERIZATION OF CU-AL2O3 E NI-AL2O3 NANO-COMPOSITES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4062@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Os compósitos Cu-Al2O3 possuem excelente resistência a recozimentos em altas temperaturas bem como altas condutividades térmica e elétrica. Uma dispersão nanométrica uniforme de partículas cerâmicas na matriz metálica confere características únicas ao material, possibilitando a sua utilização como, por exemplo, resfriadores ativos. Por outro lado, estas propriedades são essencialmente dependentes da microestrutura do material, que por sua vez, varia de acordo com o método de preparação adotado. Os principais objetivos do

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Ilyas, Muhammad. "Development of nano-graphene cementitious composites (NGCC)." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/15828.

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Ordinary Portland cement (OPC) is the main constituent of concrete works as a principal binder for aggregates and intrinsically transmits the brittleness into concrete through the formation of hydration crystals in the cement microstructure. A number of nano cementitious composites were developed in recent years to offset the brittleness with newly discovered nanomaterials and the most prevalent among those is the graphene oxide (GO). The main objective of this PhD research work is to develop nano graphene cementitious composites (NGCC) using low cost, two dimensional (2D) graphene nanoplatele

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Casella, Laura A. [Verfasser], and Wolfgang [Akademischer Betreuer] Schmahl. "Nano- and microstructural transformation processes during diagenesis of biogenic carbonates / Laura A. Casella ; Betreuer: Wolfgang Schmahl." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1180981944/34.

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Casella, Laura Antonella [Verfasser], and Wolfgang [Akademischer Betreuer] Schmahl. "Nano- and microstructural transformation processes during diagenesis of biogenic carbonates / Laura A. Casella ; Betreuer: Wolfgang Schmahl." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1180981944/34.

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Dinh, Hung Manh. "Etude IR/Raman de la variabilité de fibres protéiques : corrélations entre structure locale, traitements et propriétés (nano)mécaniques de fibres et films de soies." Paris 6, 2010. http://www.theses.fr/2010PA066566.

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La variabilité des propriétés mécaniques des fibres naturelles limite leur usage alors que le renchérissement inévitable des produits synthétiques issus du pétrole incite à utiliser les produits naturels ou bio-sourcés. Aussi, à coté des efforts de sélection génétiques et du contrôle des élevages produisant de la soie, l’obtention de produits régénérés et la recherche des moyens de contrôle des variabilités intrinsèques et extrinsèques reçoivent une attention grandissante. Ce travail par une analyse combinée par calorimétrie, absorption IR et diffusion Raman tente d’établir les corrélations en

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Flament, Camille. "Etude des évolutions microstructurales sous irradiation de l'alliage d'aluminium 6061-T6." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAI074/document.

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L’alliage d’aluminium 6061-T6 a été choisi comme matériau de structure du casier et du caisson du cœur de réacteur Jules Horowitz (RJH). Transparent aux neutrons, il doit ses bonnes propriétés mécaniques à la précipitation de fines aiguilles nanométriques appelées béta'' contenant Mg et Si et à la présence de dispersoïdes Al(Cr,Fe,Mn)Si jouant un rôle important dans la résistance à la recristallisation. Le caisson et le casier seront soumis à de forts flux neutroniques à une température avoisinant les 50°C. L’objectif de cette thèse est d’étudier les évolutions microstructurales de l’alliage s

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Ng, Robin. "Novel tissue scaffolds comprising nano- and micro-structures." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196260817.

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Wang, Yachao. "Microstructure and Mechanical Properties of Laser Additively Manufactured Nickle based Alloy with External Nano Reinforcement: A Feasibility Study." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535703630944044.

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Jensen, Colby Bruce. "Bridging the Nano- and Macro-Worlds: Thermal Property Measurement Using Thermal Microscopy and Photothermal Radiometry – Application to Particle-Irradiation Damage Profile in Zirconium Carbide." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/3105.

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Multiscaled experimental investigations of heat transfer from nanoscales to macroscales are requisite to progress in energy technologies. In nuclear applications, material properties can undergo significant alteration due to destructive interaction with irradiating particles at microstructural levels that affect bulk properties. Correlating material microstructure to bulk material properties remains a crucial hurdle for obtaining first-principles-based, full-scale material property predictive capability. Ion-irradiated material studies provide valuable insight into material behavior under irra

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Spartacus, Gabriel. "Evolution des nano-oxydes et de la microstructure au cours du procédé de fabrication d'aciers renforcés par dispersion d'oxydes." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALI085.

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Les aciers renforcés par dispersion d’oxydes (ODS pour Oxide Dispersion Strengthened) sont des matériaux candidats pour leur utilisation comme gainage du combustible pour des centrales nucléaires de génération IV. Dans ces aciers, une dispersion de nano-oxydes Y-Ti-O à l’origine de l’essentiel des propriétés mécaniques de l’alliage, est incorporée dans une matrice par métallurgie des poudres. Pendant ce procédé, une poudre d’acier Fe-Cr est broyée avec une poudre d’Y2O3 et une poudre de TiH2, afin de mettre en solution l’Y, le Ti et l’O, autrement immiscible dans la matrice. Le broyage induit

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Fon, Warren Chung Wah. "Thermal Properties of Nano- and Microstructures." Thesis, 2004. https://thesis.library.caltech.edu/2080/1/Thesis.pdf.

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<p>My work is on the experimental study of thermal conduction in nano and microscale structures. The work is divided into two parts. In the first part, we measure the thermal conductance of a suspended device from 4 to 40 K. The thermal conduction of a suspended, free-standing beam is analyzed to study the effect of phonon scattering on thermal conduction. We conclude that phonon scattering is much more severe in a nanoscale beam than bulk material.</p> <p>In the second part of the work, we proceed to dynamic measurement to measure the heat capacity of a suspended device. From that we study

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Kuo, Hsin-Fu, and 郭信甫. "Syntheses, Microstructures, Photoluminescence of Nano- and Bulk-Thiogallate Phosphors." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/56004610054389444588.

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碩士<br>國立交通大學<br>應用化學系<br>91<br>Syntheses, Microstructures, Photoluminescence of Nano- and Bulk-Thiogallate Phosphors Student：Hsin-Fu Kuo Advisor：Dr. Teng-Ming Chen Institute of Applied Chemistry National Chiao Tung University ABSTRACT To investigate the correlation among the principles of synthesis microstructure, luminescence and relevant mechanism, we have prepared both microcrystalline and nano-sized ZnGa2S4 phosphors via solvothermal and solid-state routes, respectively. By selecting appropriate sol

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Haon-YaoChen and 陳虹瑤. "Self Organized Polyaniline Nano/Microstructures and Observations of Polymerization-Assemble Processes." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/61313353152154346175.

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碩士<br>國立成功大學<br>化學工程學系碩博士班<br>98<br>This study focuses on the assembly process and polymerization of the micro-nano self-assembly polyaniline. We not only observe the process of the micro-nano self-assembled polyaniline, and discuss the possible mechanism of the formation of ordered structure reasons. General polyaniline generation method, including hard template generation method and soft template generation method. Otherwise, according to the different synthesis, we can divide into single-phase polymerization, interfacial polymerization, self-stabilized dispersion polymerization and the simp

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LEE, Tung-Yuan, and 李東原. "A Flexible Micro-PEMFC Electrodes of composite Polydimethylsiloxane(PDMS) Nano/Microstructures." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/88182798435113958462.

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碩士<br>國立清華大學<br>工程與系統科學系<br>102<br>In this paper, a novel design of PDMS-based bendable electrodes with microstructures is proposed for flexible proton exchange membrane fuel cells (PEMFCs). The design of the bendable electrodes incorporates micro-structured PDMS-film to increase the reaction area and fuel pass-way, conducting layer Au with strong conjugation to the PDMS-microstructures for electron conduction, and Pt catalyst for fuel reaction. The electrodes perform ISO class 0 in adhesion test and only increase 6.6% resistance under 2/cm bending curvature. The half-cell test yields a perf

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Pinheiro, Inês Braga. "Preparation and application of chitosan-based nano/microstructures for antimicrobial protection of leather." Master's thesis, 2017. http://hdl.handle.net/1822/59756.

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Dissertação de mestrado em Química Medicinal (área de especialização em Química)<br>Currently, consumers concern a lot towards hygiene, comfort and quality on footwear. So new challenges have been created for footwear industry. The preferences of consumers towards natural products rather than synthetic ones are stimulating the use of tanned leather, which should overcome microorganisms growth problem associated with. Chitosan, the main derivative of chitin, is a special biopolymer with interesting properties, including biodegradability, biocompatibility, non-toxicity and antimicrobial ac

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