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Dissertations / Theses on the topic 'Methods of doping'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Sgarbossa, Francesco. "Innovative Methods for Germanium Doping." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422706.

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One of the main goals in the semiconductor research is the production of a shallow junctions conformal to the surface of a device. This request emerges from the increasing importance of nanostructured devices made by semiconductor materials like multi-gate transistors. The 3D geometry of these devices implies the capability to dope the semiconductor material in a nanostructured, non-planar geometry, which continues to be a difficult task. One of the most promising techniques for the deposition and diffusion of a well-defined amount of dopant is based on the use of self-limiting chemical deposi

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2

Kayhan, Mehmet. "Effects Of Synthesis And Doping Methods On Thermoluminescence Glow Curves Of Manganese Doped Lithium Tetraborate." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610667/index.pdf.

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In this study, differences in glow curves of Mn doped LTB powder samples synthesized with solid and wet synthesis methods and doped by using solid and wet doping techniques were investigated. Firstly, LTB was synthesized by using wet synthesis method which mainly comprises dissolution of reactants in water as solvent. Second way to produce LTB which was used in this study was solid synthesis method. In solid synthesis method, reactants were mixed in powder form. In the second part of the study, LTB produced by two different methods were doped with Mn and additionally Ag, Mg or P by using two

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3

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

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4

Gönüllü, Yakup [Verfasser]. "Functionalization of titanium dioxide nanotubes by various doping methods to use as selective gas sensing and energy storage applications / Yakup Gönüllü." München : Verlag Dr. Hut, 2013. http://d-nb.info/1037287150/34.

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5

Устименко, М. С., Павло Володимирович Руденко, Павел Владимирович Руденко та Pavlo Volodymyrovych Rudenko. "Влияние электроискрового легирования на свойства поверхностного слоя детали шток кислородного компрессора". Thesis, Сумский государственный университет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/39529.

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В большинстве современных машин износу подвергаются трущиеся поверхности сопрягаемых деталей (например, зубья шестерен редуктора, штоки компрессоров, шейки коленчатых валов двигателей, внутренняя поверхность цилиндров двигателей внутреннего сгорания и т. д.), поэтому сопрягаемые трущиеся поверхности деталей должны быть более стойкими, чем вся деталь, к действию высоких температур, трению, коррозии и т. д.

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6

VIDAL, AUGUSTO T. "Sintese e crescimento de cristais fluoretos dopados com terras raras: LiCAF:Er e BLF:TR (TR = Yb sup(3+), Ce sup(3+), Nd sup(3+))." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10970.

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7

Wilkin, Tessa Rachel. "Development of a method for detection of gene doping in thoroughbred racehorses." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/26951.

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Gene doping, the misuse of gene therapy for performance enhancement, is predicted to be the next phase of doping faced by horseracing. Since 2003, the World Anti-Doping Agency has included gene doping on the list of banned practices in human sports and has several expert teams developing detection methods. The threat of gene doping to the integrity of horseracing and welfare of horses has been discussed by members of The International Federation of Horseracing Authorities and others in the anti-doping community for over ten years. In this thesis, a method is developed for direct detection

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8

Arzakantsyan, Mikayel. "Yb:YAG Laser Crystals with Controlled Doping Distribution." Phd thesis, Ecole Polytechnique X, 2013. http://pastel.archives-ouvertes.fr/pastel-00879616.

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Le développement de lasers solides de puissance-moyenne élevée doit faire face à des problèmes très spécifiques. La gestion de la thermique et de l'amplification de l'émission spontanée (ASE) pour de larges amplificateurs lasers deviennent des points clés lorsque l'augmentation de l'énergie de vient conséquente. Lucia est une chaîne laser de forte puissance moyenne qui repose sur le concept du miroir actif avec un cristal ou une céramique d'Yb:YAG comme milieu à gain. Comme pour d'autres systèmes lasers comparables, la distribution des ions actifs du milieu à gain est homogène en volume. Un pr

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9

Afal, Aysegul. "Hydrothermal Method For Doping Of Zinc Oxide Nanowires And Fabrication Of Ultraviolet Photodetectors." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614463/index.pdf.

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Nanotechnology comprises of the understanding and control of materials and processes at the nanoscale. Among various nanostructured materials, semiconducting nanowires attract much interest for their novel physical properties and potential device applications. The unique properties of these nanowires are based on their high surface to volume ratio and quantum confinement effect. Zinc oxide, having a direct, wide bandgap and large exciton binding energy, is highly appealing for optoelectronic devices. Due to excellent optical and electrical properties, zinc oxide nanowires have been utilized to

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10

Francis, Smita. "Optimisation of doping profiles for mm-wave GaAs and GaN gunn diodes." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2568.

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Thesis (DTech (Electrical Engineering))--Cape Peninsula University of Technology, 2017.<br>Gunn diodes play a prominent role in the development of low-cost and reliable solid-state oscillators for diverse applications, such as in the military, security, automotive and consumer electronics industries. The primary focus of the research presented here is the optimisation of GaAs and GaN Gunn diodes for mm-wave operations, through rigorous Monte Carlo particle simulations. A novel, empirical technique to determine the upper operational frequency limit of devices based on the transferred elec

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11

Bartlome, Richard. "Vapor phase infrared laser spectroscopy a complementary method for detecting doping agents in urine /." kostenfrei, 2007. http://e-collection.ethbib.ethz.ch/view/eth:30168.

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12

Schwenke, Dirk. "Indirekte und direkte Methoden zur Detektion des Erythropoietindopings." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1099561127578-94621.

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Das Problem des Missbrauchs von Erythropoietin (EPO) als Dopingsubstanz zur Steigerung der Ausdauerleistung wurde schlagartig weltweit durch den Skandal zur Tour de France 1998 bekannt. Das Internationale Olympische Komitee (IOC) führte ab 1992 Erythropoietin explizit auf der Liste der verbotenen Wirkstoffe auf, ohne des es möglich war zwischen den rekombinantem und dem körpereigene Erythropoietin zu unterscheiden. Bei der im Institut für Dopinganalytik und Sportbiochemie Kreischa durchgeführten Arbeit wurden zwei generelle Strategien verfolgt: zum einen ein indirekter Nachweis des rhEPO, basi

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Hopkin, Amy L. "Methane conversion over supported nickel catalysts : influence of gold doping, support material and preparation method." Thesis, Keele University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288499.

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14

CRUZ, SIMONE F. de A. "Crescimento e caracterizacao de monocristais de BaYsub(2)Fsub(8):TR onde TR=Ndsup(3+), Prsup(3+), Ersup(3+), Tbsup(3+), Dy sup(3+)." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11732.

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Made available in DSpace on 2014-10-09T12:55:13Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:05:56Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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15

Macpherson, Ross Fraser. "Monte Carlo modelling of Gunn devices incorporating thermal heating effects : investigations of broad frequency devices, heating effects in GaN devices and doping nucleation." Thesis, University of Aberdeen, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203872.

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Monte Carlo modelling is a common technique in numerous fields, and is widely used in semiconductor device simulation. This thesis describes the application of Monte Carlo modelling to the simulation of Gunn diode devices, focusing on devices composed of Gallium Arsenide (GaAs) and Gallium Nitride (GaN). Gunn diodes are simple structures that take advantage of negative differential resistance to act as a source of high frequency radiation, from 10 GHz to over 100 GHz in GaAs devices. It has been theorised that GaN should exhibit negative differential resistance and a GaN Gunn diode could produ

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16

Ozaki, Hirotaka. "Effect of Si and Other Elements Modification on the Photocatalytic Activities of Titanias Prepared by the Glycothermal Method." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/57274.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第13834号<br>工博第2938号<br>新制||工||1434(附属図書館)<br>26050<br>UT51-2008-C750<br>京都大学大学院工学研究科物質エネルギー化学専攻<br>(主査)教授井上正志, 教授江口浩一, 教授田中庸裕<br>学位規則第4条第1項該当

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17

Neto, Sebastiao Rocha Aladim. "Estrutura eletrônica de poços quânticos com dopagem seletiva." Universidade de São Paulo, 1990. http://www.teses.usp.br/teses/disponiveis/54/54131/tde-13032014-102103/.

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Neste trabalho realizamos o cálculo da estrutura eletrônica de poços quânticos com dopagem seletiva, usando um método k-p com 8 bandas. Utilizamos um processo de bloco-diagonalização para reduzir o Hamiltoniano 8x8 a dois blocos 4x4 a fim de diminuir o esforço computacional. Calculamos o efeito do potencial auto-consistente sobre a massa dos portadores e sobre as densidades de estado. Os resultados obtidos para as energias de excitação de uma partícula estão em pleno acordo com os dados obtidos em experimentos de absorção óptica intra-banda (espalhamento Raman ressonante)<br>In this work we de

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18

Brazda, Petr. "Preparation of Fe2O3/SiO2 nanocomposites from molecular precursor by the sol-gel method and the doping of iron (III) by trivalent metal cations." Strasbourg, 2009. http://www.theses.fr/2009STRA6289.

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Les travaux que nous présentons dans cette thèse se concentrent sur la préparation de nanocomposite de silice sol-gel amorphe comme matrice de synthèse de nanocristaux de epsilon-Fe2O3 purs. La souplesse du procédé de synthèse nous a permis d’envisager et de réaliser la substitution partielle et raisonnée du fer par l’aluminium et gallium. Pour cela nous avons élaboré les nanocomposites Al0. 25Fe1. 75O3/SiO2, Al0. 50Fe1. 50O3/SiO2, Al0. 75Fe1. 25O3/SiO2, Ga0. 25Fe1. 75O3/SiO2, Ga0. 50Fe1. 50O3/SiO2 and Ga0. 75Fe1. 25O3/SiO2. Nous avons pu grâce à la maitrise de la synthèse du précurseur et des

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19

Ismail, Razali. "Simulation of dopant diffusion in silicon using finite element method : an adaptive meshing approach." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291751.

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20

Hughes, Juanita Maree. "A novel identification method for ultra trace detection of biomolecules using functionalised Surface Enhanced Raman Spectroscopy (SERS)." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/72864/2/Juanita_Hughes_Thesis.pdf.

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This thesis developed a new method for measuring extremely low amounts of organic and biological molecules, using Surface enhanced Raman Spectroscopy. This method has many potential applications, e.g. medical diagnosis, public health, food provenance, antidoping, forensics and homeland security. The method development used caffeine as the small molecule example, and erythropoietin (EPO) as the large molecule. This method is much more sensitive and specific than currently used methods; rapid, simple and cost effective. The method can be used to detect target molecules in beverages and biologica

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21

Lindblad, Andreas. "A Treatise on the Geometric and Electronic Structure of Clusters : Investigated by Synchrotron Radiation Based Electron Spectroscopies." Doctoral thesis, Uppsala University, Department of Physics and Materials Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8463.

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<p>Clusters are finite ensembles of atoms or molecules with sizes in the nanometer regime (<i>i.e.</i> nanoparticles). This thesis present results on the geometric and electronic structure of homogeneous and heterogeneous combinations of atoms and molecules. The systems have been studied with synchrotron radiation and valence, core and Auger electron spectroscopic techniques.</p><p>The first theme of the thesis is that of mixed clusters. It is shown that by varying the cluster production technique both structures that are close to that predicted by equilibrium considerations can be attained as

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22

Glowacki, Frédérique. "Uhv-cvd : épitaxies, hétéro-épitaxies et dopages du silicium et de son alliage SiGe." Université Joseph Fourier (Grenoble ; 1971-2015), 1994. http://www.theses.fr/1994GRE10114.

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Ce manuscrit traite de la mise au point et des potentialites d'une nouvelle technique cvd utilisable avec des plaquettes de silicium de 200 mm de diametre et dont les applications concernent essentiellement les epi- et hetero-epitaxies de si et sige. L'objectif a ete double: (i) etudier une machine et son positionnement par rapport aux autres et (ii) developper des procedes dans ce prototype. La technique uhv-cvd retenue est basee sur l'ultravide pour garantir un taux de contamination et de fuite minimum et pour pouvoir travailler en regime de gaz moleculaire ( 10#-#3 torr). Apres avoir decrit

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23

Davis, Taylor Matthew. "Feasibility and Impact of Liquid/Liquid-encased Dopants as Method of Composition Control in Laser Powder Bed Fusion." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/9256.

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Additive manufacturing (AM) – and laser powder bed fusion (LPBF) specifically – constructs geometry that would not be possible using standard manufacturing techniques. This geometric versatility allows integration of multiple components into a single part. While this practice can reduce weight and part count, there are also serious drawbacks. One is that the LPBF process can only build parts with a single material. This limitation generally results in over-designing some areas of the part to compensate for the compromise in material choice. Over-designing can lead to decreased functional effic

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BALDOCHI, SONIA L. "Sintese e crescimento de cristais de BaLiFsub3 puros e dopados com Pb." reponame:Repositório Institucional do IPEN, 1993. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10336.

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Cruz, Simone Ferreira de Almeida. "Crescimento e caracterização de monocristais de BaY2F8:TR onde TR = Nd3+, Pr3+, Er3+, Tb3+, Dy3+." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-13102011-103049/.

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Foram realizados estudos da síntese e do crescimento de cristais de BaY2F8:TR (TR= Nd3+; Pr3+; Er3+; Tb3+; Dy3+) simplesmente dopados e codopados (Nd3+:Dy3+ ; Nd3+:Pr3+) por meio do método de fusão por zona (FZ). Os cristais crescidos foram caracterizados quanto a sua estrutura por Difração de raios-x (DRX) e Difração de nêutrons (DN) com análise pelo método de Rietveld. Foi também estudado o comportamento na fusão deste material puro e dopado com elementos terras raras trivalentes através de: microscopia eletrônica de varredura (MEV) e espectroscopia dispersiva de raios-x (EDS). A concentraçã

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Such, Sanmartin Gerard. "Assessing human growth hormone variants to determine their potential relevance in anti-doping and clinical analysis." Doctoral thesis, Universitat Pompeu Fabra, 2010. http://hdl.handle.net/10803/7198.

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Human growth hormone (GH) participates in human longitudinal growth, lipid and carbohydrate metabolism, and comprises a remarkably number of proteins with similar sequences, generated either genetically or post-translationally, that in some cases show clearly differentiated biological activities. Current methods employed for its quantification are mainly based on a specific immunodetection of the most concentrated GH variants in blood circulation. However, it is not clear neither which variants are recognised in each case, nor which is the real concentration of some of these variants. Probably

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27

Гапонова, Оксана Петрівна, Оксана Петровна Гапонова та Oksana Petrivna Haponova. "Перспективи застосування електроіскрової обробки поверхні сталевих виробів". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/66567.

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Більшість відмов механізмів машин відбувається в результаті поверхневого руйнування і, в першу чергу, від зношування. Дослідження в області тертя, зношування, зносостійкості і принципово нових типів матеріалів служать передумовою для створення на цій основі нових способів і технологій, спрямованих на кардинальне вирішення питань збільшення довговічності швидкозношуваних деталей.

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Souza, Ana Paula Nazar de. "Sínteses e caracterizações de TiO2 puro, dopado e co-dopado pelo método sol-gel e suas atividades fotocatalíticas." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7318.

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Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Nanopartículas de dióxido de titânio vêm sendo extensamente empregadas como fotocatalisa-dores, já que são eficientes na degradação de diversos poluentes. Visando a obtenção de titâ-nias com diferentes propriedades, realizaram-se sínteses através do método sol-gel, a partir da hidrólise do tetraisopropóxido de titânio (IV) TIPP e seguindo-se os princípios da Química Verde, dispensando-se temperaturas e pressões elevadas. Foi estudada a influência de dife-rentes parâmetr

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Esteves, Marcos Cramer. "Síntese e caracterização microestrutural, superficial e eletroquímica de óxido de estanho dopado com haletos." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/46/46132/tde-23082016-175309/.

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Os eletrodos de metais nobres, considerados os melhores, implicam em altos custos para qualquer tipo de aplicação em larga escala. Com intuito de minimizar os custos e manter a eficiência, muitos estudos buscam materiais alternativos. O óxido de estanho apresenta-se como uma boa alternativa para material de eletrodo, principalmente por poder ser utilizado na forma de filme condutor transparente. Atualmente, é aplicado em sensores eletroquímicos para detecção de gases, painéis de cristal líquido e em células fotovoltaicas. Como se trata de um semicondutor, é comum o uso de dopantes para melhora

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JAGOSICH, FABIO H. "Estudos dos processos de transferência de energia dos íons de Ersup(3+) e Hosup(3+) para os íons de Ndsup(3+), Tbsup(3+) e Eusup(3+) no cristal de LiYFsub(4) e no vidro ZBLAN para a otimização de meios laser ativos que operam na região de 3 microns." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11432.

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Made available in DSpace on 2014-10-09T12:51:51Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:32Z (GMT). No. of bitstreams: 0<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP<br>FAPESP:00/11446-0

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Marzorati, S. "PT-FREE NANO- AND MICRO-STRUCTURED CARBONS FOR ELECTROCHEMICAL OXYGEN REDUCTION REACTION." Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/332529.

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Oxygen reduction reaction (ORR) catalysts are of crucial importance in developing low- and medium-temperature fuel cells, as PEMFCs (Polymer Electrolyte Membrane Fuel Cells), from which sizeable energy saving and reduction of greenhouse gas emission are expected in comparison with the use of coal and oil based fuels in thermal engines. The same electrochemical oxygen reduction reaction takes place in oxygen depolarized cathodes (ODC) in chlor-alkali electrolysis, replacing the conventional hydrogen evolving cathode, gaining about 30% energy consumption reduction in the overall process. At pres

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Carvalho, Vinícius Alexandre de. "Síntese pelo método sol-gel de catalisadores nanoestruturados de ZnO dopados com cobre para emprego de degradação fotocatalítica de ciprofloxacino." Universidade Estadual do Oeste do Paraná, 2018. http://tede.unioeste.br/handle/tede/4075.

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Submitted by Marilene Donadel (marilene.donadel@unioeste.br) on 2019-01-25T12:11:45Z No. of bitstreams: 1 Vinicius_Carvalho_2018.pdf: 2139357 bytes, checksum: 24497f5a37afd82fb7a7bb75a202949e (MD5)<br>Made available in DSpace on 2019-01-25T12:11:45Z (GMT). No. of bitstreams: 1 Vinicius_Carvalho_2018.pdf: 2139357 bytes, checksum: 24497f5a37afd82fb7a7bb75a202949e (MD5) Previous issue date: 2018-07-30<br>The heterogeneous photocatalysis process is one of the treatment options for pollutants, which has presented excellent results. In this work, zinco oxide and Cu doped zinc oxide were synthesize

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TARELHO, LUIZ V. G. "Caracterizacao espectroscopica e dinamica temporal dos processos de transferencia de energia entre os ions Tm sup(3+) - Ho sup(3+) e Yb sup(3+) - Tm sup(3+) em cristais de LiYF sub(4) e LiLuF sub(4)." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10980.

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Made available in DSpace on 2014-10-09T12:46:25Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:57:21Z (GMT). No. of bitstreams: 1 07543.pdf: 4162108 bytes, checksum: fea345edb32c7ebb6b06110c513a47b1 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP<br>FAPESP:95/03214-1

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Guan, Shian. "Étude de la synthèse de dioxyde de vanadium : propriétés physico-chimiques, dopages élémentaire et applications sous forme de films." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0443.

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L’oxyde VO2 est un matériau prometteur pour son utilisation en tant que film pour fenêtres intelligentes en raison de sa transition réversible métal isolant à 68°C. Cette transition est accompagnée par d’importantes modifications des propriétés optiques avec passage d'un état transparent à basse température à un état plus opaque du proche infrarouge. D’un point de vue cristallographique, la transition implique une transformation de deux phases cristallines: la phase monoclinique (M) et la phase rutile (R).Les verrous technologiques limitant l'utilisation commerciale de cet oxyde sont sa tempér

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35

Kurdi, Mohamad. "Sur l'utilisation des sulfures en catalyse d'hydrotraitement le trisulfure du niobium /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376148133.

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36

Alboussière, Thierry. "Magnétohydrodynamique et ségrégation solutale en croissance Bridgman horizontale." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0153.

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Lors de la croissance d'un monocristal d'un materiau semi-conducteur dope, la convection thermogravitaire dans la phase liquide perturbe le transfert de solute, entrainant des heterogeneites de concentration dans le solide forme. L'emploi d'un champ magnetique permanent permet de reduire les mouvements convectifs du bain conducteur de l'electricite et d'agir ainsi sur la segregation chimique. Dans un premier temps, une theorie asymptotique de la magnetohydrodynamique est reformulee pour qu'il soit possible de prendre en compte un terme de force thermogravitaire sous l'hypothese de boussinesq,

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37

Tossoukpe, Howatchinou. "Modélisation et simulation du frittage de matériaux dopés et de multimatériaux à l'échelle de la microstructure." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2013. http://tel.archives-ouvertes.fr/tel-00979312.

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Dans le cadre de la simulation du procédé de consolidation de pièces céramiques ou composites CerMet par frittage, cette thèse se propose de modéliser et de simuler deux aspects particuliers du frittage. Le premier consiste à prendre en compte l'effet d'éléments dopants sur l'évolution microstructurale d'un élément volumique représentatif d'un compact de poudre. Pour cela les chemins de diffusion tels que la diffusion volumique et de surface sont pris en compte. Le second aspect est en relation avec l'élaboration de matériaux composites à dispersoïdes et l'étude de l'évolution de leur microstr

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38

Maurel, Philippe. "Contribution a l'etude des proprietes physiques des composes ga : :(x)in::(1-x)as::(y)p::(1-y) obtenus par croissance en phase vapeur par la methode des organometalliques." Paris 6, 1987. http://www.theses.fr/1987PA066517.

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Etude des proprietes electriques et optiques a basse temperature dans inp de haute purete. Observation de l'effet hall quantique par etude detaillee de proprietes de transport des porteurs bidimensionnels a l'heterojoncion, a dopage module de type p ou n dans inp/ga::(0,47) in::(0,53) as et inp/ga::(0,25) in::(0,75) as::(0,5) p::(0,5). Etude des proprietes structurelles et optiques des puits quantiques multiples inp/ga::(0,47) in::(0,53) as

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Lagrange, Jean-Pierre. "Contribution à l'étude du dopage bore, azote et phosphore dans le diamant." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10210.

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Le diamant est un semi-conducteur a large bande interdite (5. 4 ev) tres prometteur en electronique a haute temperature et de forte puissance. Cependant, son utilisation est limitee par l'absence d'un dopage de type n. Nous avons etudie dans cette these le dopage au bore du diamant (type p), et l'incorporation de phosphore et d'azote dans le diamant par implantation ionique. Nous avons elabore des couches minces de diamant par depot chimique en phase vapeur assiste par plasma micro-onde. Nous avons utilise dans notre etude diverses techniques de caracterisation : spectroscopie de diffusion ram

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40

Marcon, Jérôme. "Simulation numérique de la diffusion de dopants dans les matériaux III-V pour les composants microoptoélectroniques." Rouen, 1996. http://www.theses.fr/1996ROUES061.

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Le sujet de cette thèse concerne la modélisation et la simulation numérique de la diffusion des dopants dans les composants microoptoélectroniques à base de matériaux III-V. Cette diffusion peut se produire au cours des traitements thermiques nécessaires à la fabrication des composants (épitaxie, réalisations de contacts,. . . ) Dans un premier temps, les aspects physiques et technologiques de la diffusion sont abordés. Une attention particulière est accordée au mécanisme substitutionnel-interstitiel de diffusion. La modélisation de la diffusion des dopants de type p dans les matériaux III-V a

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41

Weil, Thierry. "Etude theorique du transport perpendiculaire aux couches dans les semiconducteurs 3-5 modules suivant une dimension." Paris 6, 1987. http://www.theses.fr/1987PA066099.

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Proposition d'un modele pour le transport inelastique et application au transport assiste par phonons entre deux puits quantiques, a la capture des porteurs par le puits quantique d'un laser sch, au transport dans les pseudoalliages quaternaires et dans les superreseaux. Analyse des differents modeles de l'effet tunnel et discussion de la duree de l'effet tunnel; application aux diodes a double barriere et mise en evidence de l'equivalence des descriptions basees sur l'effet tunnel resonnant et sur l'effet tunnel sequentiel, au moins en regime continu; effets des diffusions, developpement d'un

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42

Biotteau, Katia. "Elaboration et caractérisation de composites Alumine/Zircone à vocation orthopédique." Phd thesis, INSA de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00995100.

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Ce travail de thèse a pour objectif l'élaboration et la caractérisation de composites Alumine/Zircone obtenus par voies conventionnelles, et dédiés à un usage orthopédique. Ces composites présentent une biocompatibilité prouvée, d'excellentes propriétés mécaniques ainsi qu'une grande stabilité. Ils sont plus résistants, plus fiables que l'alumine ou la zircone seules et permettent d'envisager des composants de tailles et formes plus exigeantes mécaniquement. Actuellement ces composites semblent les plus adaptés pour la réalisation de prothèses orthopédiques mais peuvent encore être optimisés v

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43

Benjelloun, Nadia. "Caracterisation des niveaux profonds dans le materiau photorefractif bi : :(12) geo::(20) par analyse de transitoires de courant photo-induit." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13183.

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La methode est utilisee pour l'etude de la densite d'etats dans la bande interdite du silicium amorphe hydrogene et sur cdin::(2)s::(4). La caracterisation des niveaux ayant des energies d'ionisation thermique entre 0,1 ev et 0,9 ev, le modele de transfert de charge decrivant l'effet photorefractif et l'evaluation du niveau de recombinaison, sont faits dans le materiau photorefractif. Les effets du dopage (fer) et du codopage (fer, vanadium) sur les niveaux sont consideres. Le centre responsable de la capture d'electrons est aussi etudie par absorption optique et photoconductivite photoinduite

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44

Lusson, Alain. "Preparation par epitaxie en phase liquide et etude physique des solutions solides cd : :(x)hg::(1-x)te 0,5 <- x <-1." Paris 6, 1987. http://www.theses.fr/1987PA066497.

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Dans le but d'etudier un materiau utilisable pour la fabrication de detecteurs pour les telecommunications par fibre optique a 1,3 et 1,55mu m, des echantillons de cd::(x) hg::(1-x) te(0,5 x 1) ont ete prepares par epitaxie en phase liquide en tube ouvert. Diverses methodes de caracterisation (microsonde electronique, topographie rx, effet hall, sonde ionique. . . ) ont montre la bonne qualite des couches. Le dopage effectue au cours de la croissance par in et cu a ete aborde. Etude des effets d'alliage dans cdhgte par photoluminescence

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45

Sgarbossa, Francesco. "Innovative Methods for Germanium Doping." Doctoral thesis, 2020. http://hdl.handle.net/11577/3357393.

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46

Jen, Hsin-Wei, and 任昕緯. "Preparation of p-type ZnO films with different doping methods by DC magnetron sputtering method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/14984233693486120155.

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碩士<br>國立東華大學<br>材料科學與工程學系<br>97<br>We successfully prepared p-type ZnO thin films by arsenic doping and gallium / arsenic codoping using dc magnetron sputtering. We control the doping concentration of ZnO films by target preparation with different dopant concentration. The formation mechanism of acceptor defect with arsenic in monodoping and codoping is discussed. First, we found a proper annealing condition for the generation of p-type conductivity of the samples in our study by changing the temperature and time for rapid thermal annealing. According to XRD and XPS analysis by different annea

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MORAVCOVÁ, Dita. "Drogy a sport." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-80601.

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This graduation theses occupy by the doping problem specify how the students of a sports grammar school, i.e. future professional sportsmen, are familiarized with the issue of doping, and what attitudes to doping they assume, what their experience with doping is, etc. I contect of this four hypotheses were set in. Hypothesis 1, the students of the chosen sports grammar school believe that if professional sportsmen use drugs recreationally, they use most frequently alcohol, nicotine and marijuana, in this sequence, was confirmed. Hypothesis 2, the students of the chosen sports grammar school be

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Su, Yu-ming, and 蘇昱銘. "Materials Characteristics and Electric Performance of Gd2O3 doped CeO2 with the doping of Sintering Aids by Sol-Gel Methods." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/36328041882963600454.

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碩士<br>大同大學<br>材料工程學系(所)<br>97<br>In this study, we proposed sol-gel method to prepare gadolinia-doped ceria (GDC) solid electrolytes with the addition of SiOX or TiOX as the sintering aids. Materials characteristics of the prepared and calcined electrolyte samples were identified by X-ray diffraction (XRD) for crystalline structure, Specific surface area analyzer (BET) for particle size and scanning electron microscopy (SEM) for surface morphology of powders. The electric performance and density were measured by Archimedes method and AC impedance method. For the calcined process of SiOX-doped

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IANNELLA, LOREDANA. "Forensic application of isotope ratio mass spectrometry: development and validation of GC-C-IRMS based methods in doping analysis." Doctoral thesis, 2020. http://hdl.handle.net/11573/1466417.

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The isotope ratio mass spectrometry coupled to gas chromatography (GC-C-IRMS) is a mandatory procedure in anti-doping analyses performed on urinary samples in which the concentration and/or the ratio concentrations of specific steroid profile markers overcome the limits defined by the World Anti-Doping Agency (WADA) or deviate from the population and individual reference range. It is a confirmatory investigation to establish whether these alterations, if not caused by physiological reasons, can be attributed to a synthetic steroids’ intake. Indeed, the determination of their 13C composition, w

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Krejčík, Pavel. "Dopingové případy v českém sportu." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-339621.

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Title: Doping Cases in Czech Sport Objectives: The main goal of this work is to analyze doping cases in the Czech Republic by doping findings in terms of doping substances and methods, other doping offense, sport, nature of sampling, sanctions, and gender. Then compare the results with the statistics of doping cases in the world. The purpose is to collect, compare, then process and clarify the current statistics doping cases. Methods: To create work were used document analysis, text interpretation, comparison, collection of data, information and subsequent processing. Results: Among the athlet

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