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Dissertations / Theses on the topic 'Film roughness'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Lee, Hyunjin. "Radiative properties of silicon wafers with microroughness and thin-film coatings." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07092006-181152/.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2006.<br>Zhang, Zhuomin, Committee Chair ; Joshi, Yogendra, Committee Member ; Lee, Kok-Meng, Committee Member ; Gallivan, Martha, Committee Member ; Zhao, Yiping, Committee Member.

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2

Guegan, Johan. "Experimental investigation into the influence of roughness on friction and film thickness in EHD contacts." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/53388.

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The roughness of machined surfaces such as those in bearings and gears is characterized by asperities which cover a wide spectrum of wavelengths and heights. When the height of the asperities becomes comparable to the lubricant film thickness, the roughness is known to influence friction and wear behaviour. This thesis reports an experimental investigation into the effect of roughness on the film thickness and friction in EHD contact. This work focuses on the particular roughness case of ridges oriented parallel to the rolling-sliding direction, such as the ones produced on raceways during the

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3

Cardwell, Nicholas Don. "Effects of Realistic First-Stage Turbine Endwall Features." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/36121.

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The modern gas turbine engine requires innovative cooling techniques to protect its internal components from the harsh operating environment typically seen downstream of the combustor. Much research has been performed on the design of these cooling techniques thus allowing for combustion temperatures higher than the melting point of the parts within the turbine. As turbine inlet temperatures and efficiencies continue to increase, it becomes vitally important to correctly and realistically model all of the turbine's external cooling features so as to provide the most accurate representation o

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4

Shioya, Nobutaka. "Development of Analytical Technique of Molecular Orientation in a Thin Film and Its Application to Low-Crystallinity Organic Thin Films Having a Surface Roughness." Kyoto University, 2018. http://hdl.handle.net/2433/232268.

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5

Aghasi, Paul P. "Dependence of Film Cooling Effectiveness on 3D Printed Cooling Holes." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1458893416.

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6

Webb, Joshua J. "The Effect of Particle Size and Film Cooling on Nozzle Guide Vane Deposition." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313528110.

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7

Pavlík, František. "Studium vlivu parametru elipticity na rozložení tloušťky mazacího filmu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229941.

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Diploma thesis deals with elastohydrodynamic lubrication of point contacts, which surfaces are influenced by topography and velocity vector of one rubbing surface is misaligned. Author summarizes knowledge of previously published research articles, which fundamentally enrich current state of knowledge. Diploma thesis contains experimental measurement results of the film thickness and the way of lubrication film formation in elliptical contact for different ellipticity parameters, kinds of rubbing surfaces and angles of the velocity vector. New findings have helped to better understand the beha

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8

Fratini, Christopher M. "Study of the Morphology and Optical Properties of Propylene/Ethylene Copolymer Films." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/27211.

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The development of a new catalyst system by The Dow Chemical Company has resulted in the production of isotactic polypropylene and propylene/ethylene copolymers with a unique defect and comonomer distribution. This work investigated the morphology and optical properties of cast and compression molded films made from the homopolymer and copolymers with up to 20 mol% ethylene comonomer. The defect distribution of the Dow Chemical copolymers resulted in materials with lower crystallinity than Ziegler-Natta or metallocene-made materials of similar ethylene content. These materials exhibited a gamm

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9

Sugar, Joshua D. "Mechanisms of microstructure development at metallic-interlayer/ceramic interfaces during liquid-film-assisted bonding." Berkeley, Calif. : Oak Ridge, Tenn. : Lawrence Berkeley National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2003. http://www.osti.gov/servlets/purl/825347-j6A0Su/native/.

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Thesis (M.S.); Submitted to the University of California, Berkeley, CA (US); 1 Dec 2003.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "LBNL--54185" Sugar, Joshua D. USDOE Director. Office of Science. Basic Energy Sciences (US) 12/01/2003. Report is also available in paper and microfiche from NTIS.

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10

Simon, Darren, and s3027589@student rmit edu au. "Chemistry and Morphology of Polymer Thin Films for Electro-Optical Application." RMIT University. Applied Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070123.122707.

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Thin polymer films and their properties have been investigated. The characteristics of crystalline polymers according to film thickness have been improved using polycaprolactone (PCL). The melting enthalpy of PCL has increased when the film thickness decreased and the peak melting temperature showed no significant changes with film thickness. Film thickness variation influenced surface roughness and crystal size. Optical microscope images showed the rougher surface of thicker films. The spinning time has shown no influence on film thickness and no significant changes to surface roughness.

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11

Bock, Bradley D. "Surface influences on falling film boiling and pool boiling of saturated refrigerants : influences of nanostructures, roughness and material on heat transfer, dryout and critical heat flux of tubes." Thesis, University of Pretoria, 2020. http://hdl.handle.net/2263/78711.

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Falling film evaporators that operate in the nucleate boiling regime in the refrigeration industry offer a number of advantages over their flooded counterparts such as lower refrigerant charge and at times improved heat transfer. Existing literature has not characterised the influence of surface characteristics on the falling film boiling process, and they are poorly understood for the pool boiling process. The purpose of this study was therefore to experimentally measure the influence of roughness, material and nanostructures on the heat transfer of falling film boiling and pool boiling of sa

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12

Moraru, Laurentiu Eugen. "Numerical Predictions and Measurements in the Lubrication of Aeronautical Engine and Transmission Components." University of Toledo / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1125769629.

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13

Šperka, Petr. "In-situ studium změny topografie třecích povrchů v elastohydrodynamickém kontaktu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-233978.

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This dissertation thesis deals with elastohydrodynamic lubrication (EHL) of surfaces with real roughness. Systematic study of surface harmonic components behaviour, during their passage of the EHL contact, by other authors led to retrieval of a uniform principle according which individual harmonic components deform inside the contact. Although the amplitude attenuation model can provide rapid tool for more accurate surface assessment in design process it has not been validated on real surfaces till now. The thesis represents pioneering work on quantitative analysis of real surfaces EHD measure

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14

Dahal, Lila R. "Spectroscopic Ellipsometry Studies of Thin Film a-Si:H Solar Cell Fabrication by Multichamber Deposition in the n-i-p Substrate Configuration." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1365202814.

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15

Fabricius, John. "Homogenization of some problems in hydrodynamic lubrication involving rough boundaries." Doctoral thesis, Luleå tekniska universitet, Matematiska vetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25734.

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This thesis is devoted to the study of some homogenization problems with applications in lubrication theory. It consists of an introduction, five research papers (I–V) and a complementary appendix.Homogenization is a mathematical theory for studying differential equations with rapidly oscillating coefficients. Many important problems in physics with one or several microscopic scales give rise to this kind of equations, whence the need for methods that enable an efficient treatment of such problems. To this end several mathematical techniques have been devised. The main homogenization method us

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16

Wang, Guoqing. "Thin water films driven by air through surface roughness." [Ames, Iowa : Iowa State University], 2008.

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17

Fong, Tsz Wang. "Surface roughness parameter at synthesis of cubic boron nitride films." access abstract and table of contents access full-text, 2005. http://libweb.cityu.edu.hk/cgi-bin/ezdb/dissert.pl?msc-ap-b21174143a.pdf.

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Thesis (M.Sc.)--City University of Hong Kong, 2005.<br>At head of title: City University of Hong Kong, Department of Physics and Materials Science, Master of Science in materials engineering & nanotechnology dissertation. Title from title screen (viewed on Aug. 31, 2006) Includes bibliographical references.

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18

Picard, Loïc. "Mise au point d'additifs siliciés pour l'adhérisation d'élastomères silicone sur supports métalliques." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0114.

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L’objectif de ces travaux de thèse était de développer un primaire d’adhésion stable, permettant l’adhérisation de tous types d’élastomères silicone sur une grande majorité de surfaces métalliques, et ce de façon reproductible. Dans un premier temps, une étude bibliographique détaillée des différentes formulations de primaire à base de silanes utilisées pour l’adhésion de tous types d’élastomères silicone (EVC, EVF et LSR) a été effectuée. Pour compléter la compréhension du système métal/primaire d’adhésion/élastomère silicone étudié, trois formulations de primaire, dont une formulation « mais

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19

Watson, Shannon M. "Impact of large scale substrate roughness on giant magnetoresistive thin films." W&M ScholarWorks, 2005. https://scholarworks.wm.edu/etd/1539623488.

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This dissertation presents an investigation on the effects of large scale roughness on the properties of giant magnetoresistive multilayers. The large scale roughness (sigmarms > 5 nm) is introduced into giant magnetoresistive thin films through the substrate. Current-in-plane (CIP) and current-perpendicular-to-the-plane (CPP) thin films were deposited by dc magnetron and triode sputtering. All films were characterized for roughness, magnetic and electronic behavior.;Our research on both pseudo spin valves and exchange-biased spin valves shows that long length scale roughness does not have a s

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20

Yousaf, Yusra. "Surface roughness characterisation of the polymeric films by atomic force microscopy." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/surface-roughness-characterisation-of-the-polymeric-films-by-atomic-force-microscopy(84735afa-6dd4-419a-9821-0646311ab4cd).html.

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Probe microscopy techniques (Atomic Force Microscopy and Kelvin Force Microscopy) have been shown to be instrumental in the analysis of samples; such as resists and nanostructured materials. Through these techniques detailed surface information has been derived, including information such as surface roughness and surface charge distribution. Poly(Methylmethacrylate) (PMMA), remains at the forefront of resists utilised in e-beam lithography in the electronics industry. Surface morphology (specifically roughness) analysis remains a key parameter of investigation, particularly in the examination

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21

Hu, Jin. "Experimental and theoretical investigation of roughness effects on thin laminar fluid films." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ27957.pdf.

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22

Rahman, Mohammed Magfurar. "MAPPING SURFACE SOIL MOISTURE AND ROUGHNESS BY RADAR REMOTE SENSING IN THE SEMI-ARID ENVIRONMENT." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1193%5F1%5Fm.pdf&type=application/pdf.

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23

ROGER, JEAN-PAUL. "Contributions a l'etude des surfaces, interfaces et films minces par la methode mirage." Paris 6, 1988. http://www.theses.fr/1988PA066509.

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Detection in situ d'un depot metallique sur une electrode rugueuse avec une sensibilite d'une fraction de couche monoatomique; analyse et modelisation des effets de rugosite pour des surfaces metalliques, caracterisation optique et thermique de couches minces semiconductrices et mise en evidence d'une absorption de surface

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24

Trigoulet, Nicolas. "Probing barrier-type anodic alumina films on nano-patterned substrates." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/probing-barriertype-anodic-alumina-films-on-nanopatterned-substrates(7c888ffd-f901-4993-b30d-05fc0a3bf514).html.

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The growth of barrier-type anodic alumina films formed by anodizing relatively rough substrates has been shown to proceed by high field ionic conduction. As a result of the ionic transport and the induced plasticity, smoothing of the oxide surfaces and the metal/oxide interfaces arises. However, such a smoothing model was deduced from topographical observations and, therefore little insight was gained about the transport mechanism leading to the flattening of the anodized specimens. Recently, the development of porous anodic alumina has been demonstrated to proceed by coupled ionic migration a

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25

Rayan, Mihir K. "Spray deposition of biomolecular thin films." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002681.

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26

Lehmann, Daniel, Falko Seidel, and Dietrich R. T. Zahn. "Thin films with high surface roughness: thickness and dielectric function analysis using spectroscopic ellipsometry." Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-136724.

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An optical surface roughness model is presented, which allows a reliable determination of the dielectric function of thin films with high surface roughnesses of more than 10 nm peak to valley distance by means of spectroscopic ellipsometry. Starting from histogram evaluation of atomic force microscopy (AFM) topography measurements a specific roughness layer (RL) model was developed for an organic thin film grown in vacuum which is well suited as an example. Theoretical description based on counting statistics allows generalizing the RL model developed to be used for all non-conducting material

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27

Bodart, Vincent. "Controle de la croissance d'empilements ultra-minces carbone tungstene et silicium-tungstene par ellipsometrie cinetique in-situ : application aux miroirs pour x-mous." Paris 7, 1987. http://www.theses.fr/1987PA077094.

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Dans le but d'obtenir des reflecteurs de bragg pour rx mous, on realise par pulverisation avec controle ellipsometrique in situ des empilements de 200 couches nanometriques. Observation de la formation des interfaces a l'echelle atomique, evaluation des rugosites d'interface

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28

Espinosa, Jorge D. "De-wetting of cobalt thin films on sapphire." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5314.

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Thesis (Ph. D.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains ix, 106 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 102-105).

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29

Agra-Kooijman, Deña Mae G. "Liquid Crystal Alignment and Relaxation Dynamics at Surface Modified Thin Polymer Films." Kent State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=kent1228148263.

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30

Gilliam, David R. "A study of contact between a profile meter stylus and polymer films on roughened substrates." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/45727.

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When a polymer film is deposited onto a roughened substrate, the film masks over the underlying substrate roughness. Then when attempting to measure the roughness of the polymer film surface using a stylus-type profile meter, the pressure between the tip of the stylus and the film is sufficient to plastically deform the polymer surface. The result is a possible erroneous measurement of the surface roughness of the polymer film. This thesis reports on attempts to quantify the actual roughness of the polymer film from the measurement obtained by the profile meter. Extensive surface profile data

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31

Nemani, Lingeshwar. "Effect of SnO₂ Roughness and CdS Thickness on the Performance of CdS/CdTe Solar Cells." Scholar Commons, 2005. https://scholarcommons.usf.edu/etd/790.

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Textured SnO2 films as TCO have been investigated to determine the effect of surface roughness on the performance of CdS/CdTe solar cells. Film roughness was controlled by varying the substrate temperature. Characterization of the SnO2 films has also carried out using AFM measurements. It was found that increase in substrate temperature results in increased roughness of the film. A series of cells were fabricated with different CdS thicknesses to determine the combined effect of SnO2 roughness and CdS thickness. As a part of fabrication process, cells were subjected to different post depositio

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32

Herffurth, Tobias [Verfasser], Andreas [Akademischer Betreuer] Tünnermann, Richard [Akademischer Betreuer] Kowarschick, and Miloslav [Akademischer Betreuer] Ohlidal. "Light scattering and roughness analysis of optical surfaces and thin films / Tobias Herffurth. Gutachter: Andreas Tünnermann ; Richard Kowarschick ; Miloslav Ohlidal." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1072622106/34.

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33

Mallett, Jonathan James. "Electrochemical deposition, characterisation of metal films, and the modification of electrodes by near-field photolithography." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324298.

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34

Avila, Solis Sandra Milagros. "Evaluación in vitro de la microrugosidad superficial de dos resinas tipo Bulk Fill inmersas a dos bebidas rehidratantes con pH de 2,79 y 3,3." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/628127.

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Objetivo: Comparar in vitro la rugosidad superficial de una resina compuesta tipo BulkFill: Aura® BulkFill (SDI) con la resina Tetric N-Ceram® BulkFill (Ivoclar Vivadent) al ser inmersas a dos bebidas rehidratantes: Sporade® y Gatorade®. Materiales y métodos: Se utilizaron 88 especímenes de resina divididos en cuatro grupos, confeccionados con una matriz metálica (10mm x 4mm). Se insertó las resinas con una espátula de resina, y se fotoactivó con la lámpara Elipar LedTM, con una intensidad de 1200 mW/cm2. Se sumergieron los especímenes en agua destilada. A las 24 horas, se midió la rugosid

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35

Mammei, Russell Rene. "Thin Films for the Transport of Polarized Ultracold Neutrons for Fundamental Symmetry Study." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/28714.

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The use of ultracold neutrons (UCN) to study fundamental parameters such as the neutron lifetime and decay correlations in polarized neutron beta decay are poised to make significant contributions to our understand of the Standard Model and its extensions. To this end, the UCNA experiment is pursuing a precision measurement (0.2%) of the angular correlation between the neutron spin and the direction of emission of the electron in polarized neutron decay (the ``A'' asymmetry). The UCNA experiment makes use of the spallation-driven solid deuterium (SD2) UCN source at the Los Alamos Neutron Sc

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36

Melo, Leonidas Lopes de. "Dinâmica de crescimento de filmes de platina e ouro." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-26022014-093131/.

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O caráter aleatório e não homogêneo do crescimento de filmes finos, por processo de deposição, leva à formação de uma superfície rugosa que obedece, em geral, a uma geometria fractal. A dinâmica de crescimento da superfície do filme pode ser descrita por meio de modelos de crescimento discretos, simulações numéricas e equações diferenciais estocásticas. Os modelos e as equações nos fornecem os expoentes críticos, que descrevem o comportamento da rugosidade com a escala de observação e tempo de deposição. Crescemos filmes de platina e ouro através da técnica de implantação e deposição de íons p

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37

Duvivier, Pierre-Yves. "Étude expérimentale et modélisation du contact électrique et mécanique quasi statique entre surfaces rugueuses d'or : application aux micro-relais mems." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2010. http://tel.archives-ouvertes.fr/tel-00740248.

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L'étude du contact électrique quasi statique à plusieurs échelles permet de comprendre celui des micro-relais MEMS. Au cours de ce travail, une modélisation fine du contact est développée pour valider des lois de comportement établies à partir des mesures obtenues grâce à la mise au point de deux dispositifs expérimentaux originaux : la balance de précision, qui permet de réaliser un contact à l'échelle macroscopique entre barreaux croisés recouverts des films minces des matériaux à tester, et un nanoindenteur instrumenté pour la mesure électrique reproduisant un micro-contact identique à celu

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Pepenene, Refuoe Donald. "Macroscopic and Microscopic surface features of Hydrogenated silicon thin films." University of the Western Cape, 2018. http://hdl.handle.net/11394/6414.

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Magister Scientiae - MSc (Physics)<br>An increasing energy demand and growing environmental concerns regarding the use of fossil fuels in South Africa has led to the challenge to explore cheap, alternative sources of energy. The generation of electricity from Photovoltaic (PV) devices such as solar cells is currently seen as a viable alternative source of clean energy. As such, crystalline, amorphous and nanocrystalline silicon thin films are expected to play increasingly important roles as economically viable materials for PV development. Despite the growing interest shown in these materials,

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Boukezzata, Messaoud. "Mecanismes d'oxydation des si-lpcvd fortement dopes au bore." Toulouse 3, 1988. http://www.theses.fr/1988TOU30183.

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Etude de la cinetique et des mecanismes d'oxydation thermique de films dopes a 210**(20) cm**(-3) b "in situ" et par implantation post-depot. Les resultats prennent en compte les influences du mode de dopage et de la microstructure initiale des films (qui varie d'un etat quasi-amorphe a un etat nettement polycristallin). Leur analyse s'appuie sur a) un logiciel de modelisation de l'oxydation de si et la comparaison avec la cinetique d'oxydation de temoins monocristallins qui permettent de les exprimer en termes de constante de diffusion d et de la vitesse de reaction de surface k::(s) de l'oxy

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Silva, Marcelo de Assumpção Pereira da. "Análise de superfícies de filmes finos de polianilina depositados em diferentes substratos por microscopia de força atômica." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-06062007-191316/.

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Este trabalho apresenta um estudo sobre a morfologia de filmes finos de polianilina, fabricados por diferentes processos e depositados sobre diferentes substratos pela técnica de microscopia de força atômica (AFM). Os processos usados para a fabricação dos filmes foram o de espalhamento fluido, o de centrifugação, o de auto montagem e o eletroquímico. Os substratos usados foram: vidro, ouro/cromo/vidro, quartzo, ITO, silício e mica. Além da análise visual da qualidade dos filmes, ou seja, do grau de recobrimento do substrato e da uniformidade dos filmes, foram feitas análises de parâmetros qua

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41

Blažková, Naďa. "Povrchová topografie a-CSi:H vrstev připravených v kontinuálním režimu PECVD." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376884.

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The thesis describes surface topography of a-CSi:H films deposited by continuous wave plasma enhanced chemical vapor deposition (PECVD) based on tetravinylsilane monomer (TVS). Thin films are completely used in many fields of modern technologies and their physical and mechanical properties are affected by thin film preparation techniques. In this thesis the thin films were deposited by PECVD method on silicon wafers with the pure TVS monomer. Deposited samples were topographically described and analyzed using atomic force microscopy (AFM). The main characteristics which were described are RMS

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42

Albuquerque, Diego Aparecido Carvalho. "Deposição e caracterização de filmes ultrafinos de óxido de titânio depositados por Sputtering RF." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/1167.

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Made available in DSpace on 2016-06-02T19:19:55Z (GMT). No. of bitstreams: 1 ALBUQUERQUE_Diego_2012.pdf: 2909594 bytes, checksum: 91148b3e77351d9e01e62932373d67a6 (MD5) Previous issue date: 2012-03-30<br>Financiadora de Estudos e Projetos<br>This work studied ultrathin films of titanium oxide deposited by the technique r. f. reactive sputtering with different oxygen flows and different deposition times. Optical properties were studied (ultra-violeta/Visível) and the surface morphology (Atomic Force Microscopy). The composition and structural properties of the films were analyzed by X-ray dif

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Abreu, Caio Palumbo de. "Deposição e caracterizações óptica e morfológica de filmes finos de TIOX depositados por sputtering R.F." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/1168.

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Made available in DSpace on 2016-06-02T19:19:55Z (GMT). No. of bitstreams: 1 ABREU_Caio_2013.pdf: 2028939 bytes, checksum: 65ae46e6485e945dd8307afeb9a40953 (MD5) Previous issue date: 2013-02-19<br>This work studied ultrathin films of titanium oxide were deposited on two substrates, such as pure Si (100) and glass corning 7059, by using r.f. magnetron sputtering with different oxygen flows and maintaining another parameters constant. For the purpose of this work, while keeping all parameters constant, varying only the oxygen flow (reactive gas), it was expected to identify the flow of transit

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Pereira, Anderson de Jesus. "Efeito de uma barreira cinética em modelos de crescimento de interfaces com mobilidade limitada." Universidade Federal de Viçosa, 2012. http://locus.ufv.br/handle/123456789/4264.

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Made available in DSpace on 2015-03-26T13:35:21Z (GMT). No. of bitstreams: 1 texto completo.pdf: 8816159 bytes, checksum: bb41a864a72a2d75cf9257b3e80090ca (MD5) Previous issue date: 2012-07-19<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In thin film growth, morphology is one of the most important characteristics. In particular, the appearance of self-assembled three-dimensional structures, characterized by mounds, with origin attributed to barriers that cause an imbalance between up- and downhill currents in stepped surfaces. In this dissertation we study the effects of

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Brunot-Gohin, Céline. "Optimisation des états de surface du titane et des alliages en nickel-titane par des films multicouches de polyélectrolytes." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00771411.

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L'optimisation des états de surface constitue un enjeu majeur pour les biomatériaux utilisés dans le domaine biomédical. Le titane (Ti) et ses alliages à base de nickel (NiTi) restent à ce jour les biomatériaux métalliques de prédilection dans nos applications cliniques en Odontologie (implants dentaires, instruments endodontiques, et arcs orthodontiques). Le but de nos recherche est d'optimiser les surfaces du Ti et NiTi en les fonctionnalisant par des films multicouches de polyélectrolytes (FMP). Notre travail propose d'étudier différents paramètres devant être impérativement validés avant d

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Chagroune, Lakhdar. "Modélisation de l'émissivité d'une surface en utilisant une approche fractale." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL115N.

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L’oxydation des échantillons de tungstène chauffés par effet Joule, est réalisée dans un spectrophotomètre infrarouge sous atmosphère contrôlée (10^-2 torr d'oxygène) et à des températures T ≥ 1100 K pour créer des surfaces rugueuses. La morphologie de la couche d'oxyde est caractérisée par analyseur d'images à partir du cliché d'une coupe réalisée par microscopie électronique à balayage. On assimile l'oxyde à une superposition de films minces, dont l'un hétérogène, contenant la rugosité, est étudié par la théorie de BRUGGMAN en vue de déterminer sa constante diélectrique. Les propriétés optiq

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Ortega, Luc. "Caractérisation par rayons X des isolants amorphes d'oxynitrures de silicium, SiOxNyHz, préparés en couches minces par PECVD." Grenoble 1, 1993. http://www.theses.fr/1993GRE10169.

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Ce memoire est consacre a la caracterisation des couches minces amorphes d'oxynitrures de silicium sioxnyhz preparee par pecvd. Ces materiaux isolants jouent un role de plus en plus important dans le domaine de la microelectronique. Ils ont donne lieu a un programme europeen de recherche esprit-deson qui a implique six laboratoires europeens et dans lequel nous sommes intervenus. Nous nous sommes attaches a caracteriser les oxynitrures de silicium a l'aide de plusieurs techniques x: reflectometrie x, diffusion des rayons x en incidence rasante, exafs, xanes et xps. L'epaisseur, la densite et l

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劉性義. "In type Ⅱ roughness Superconductor film the Nucleation fieldΗc3". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/55911786058063365720.

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Liao, Yi-Chiann, and 廖怡茜. "Effect of surface roughness of SnO2 film for light trapping phenomenon." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/35808422006810899802.

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碩士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>97<br>Transparent Conductive Oxide (TCO) thin films, which show high conductivity and high transmittance in the visible wavelength range, have been used as the transparent electrode in solar cell devices. For application in solar cell, increasing surface roughness of transparent conductive oxide thin films is able to enhance light scattering at the rough surface and increase light path. This is so-called light trapping effect. Such an effect can increase the light absorption in solar cell and enhance the efficiency of solar cell. TCO material used in this s

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Hwu, Chwan-Jing, and 胡傳菁. "Surface Roughness Effects on the Squeeze Film Characteristics of Partial Journal Bearing." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/18904834786032075178.

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碩士<br>中原大學<br>機械工程學系<br>88<br>The present study examines the surface roughness effects on the squeeze film characteristics of a finite partial journal bearing. We can derive the Reynolds’ equation from the momentum equations and the continuity equation and further adopt the stochastic models to develop the stochastic Reynolds’ equation describing the uniform, isotropic roughness. After obtaining the pressure distribution of the squeeze film, we can calculate the surface roughness effects on the squeeze film characteristics. The results of the study show that the surface roughness effects ha

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