Download or read book Caract risation des couches minces d oxyde de titane pour filtres optiques written by Michel Lottiaux and published by . This book was released on 1987 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES COUCHES MINCES D'OXYDE DE TITANE ONT DE NOMBREUSES APPLICATIONS OPTIQUES DANS LE CADRE DES MULTICOUCHES DIELECTRIQUES (FILTRES, MIROIRS...). LES COUCHES D'OXYDE DE TITANE OBSERVEES ONT ETE FABRIQUEES ISOLEMENT, MAIS DANS LES CONDITIONS UTILISEES POUR LA REALISATION DES MULTICOUCHES. NOUS AVONS ETUDIE ICI LES VARIATIONS DE LA MORPHOLOGIE, DE LA CRISTALLINITE ET DE LA RUGOSITE DE CES COUCHES, EN FONCTION DE L'EPAISSEUR ET DE LA TEMPERATURE DU SUPPORT AU COURS DU DEPOT. CES COUCHES PRESENTENT UNE STRUCTURE EN COLONNES AVEC UNE DOUBLE PSEUDO-PERIODE, UNE RUGOSITE IMPORTANTE, ET UNE ANISOTROPIE NON NEGLIGEABLE. CES CARACTERISTIQUES ONT ETE RELIEES A DIFFERENTS MODELES DE CROISSANCE EXISTANTS
Download or read book Elaboration et caract risation de couches minces d oxyde de titane written by Perrine Bourdet and published by . This book was released on 2006 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'anodisation à bas potentiels de films de titane obtenus par pulvérisation cathodique présente un comportement original par rapport à celle du titane massif. Elle est caractérisée par quatre étapes, dans lesquelles la relaxation des contraintes associée à une cristallisation partielle sous la phase anatase jouent un rôle primordial. Des traitements thermiques ont été effectués sur ces films. Leurs propriétés semi-conductrices ont été étudiées par spectroscopie d'impédances et photo-électrochimie. Différents modèles ont été discutés et utilisés afin d'appréhender la complexité des couches étudiées, tant les couches partiellement amorphes que cristallisées. Nos résultats ont montré sans ambiguïté l'inadéquation du modèle classique de Mott-Schottky pour les mesures d'impédances à une fréquence, méthode la plus utilisée dans la littérature. Le choix du modèle du semi-conducteur amorphe s'est avéré le plus pertinent dans la détermination des paramètres de semi-conduction.
Download or read book Etude physico chimique de couches minces d oxydes de titane obtenues par le proc d sol gel written by Thierry ROUAUD and published by . This book was released on 1992 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Etude des propri t s de couches minces d oxyde de titane d pos es par proc d s plasmas PECVD pulv risation magn tron r active DC et HPPMS written by Karim Makaoui and published by . This book was released on 2012 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse est dédiée à l’étude de couches minces de TiO2 déposées par des procédés plasmas à basse pression et basse température. Hormis, leurs propriétés semi-conductrices intéressantes pour leur utilisation en tant que collecteur d’électrons, le dioxyde de titane possède un indice de réfraction et une constante diélectrique élevés, qui le rende attractif pour des dispositifs électriques ou d’optique intégrée. Les propriétés des couches minces de TiO2 dépendent fortement du procédé de dépôt utilisé. Dans le cadre de cette thèse, trois procédés plasma sont étudiés et comparés. La structure et la composition des couches minces déposées sont étudiées par DRX, XPS, EDX, leur morphologie par MEB et leurs propriétés optiques par ellipsométrie. Le dépôt chimique en phase vapeur assisté par plasma (PECVD) en mélange O2/TIPT (Tetra Isopropoxyde de Titane) riche en oxygène à basse température (T
Download or read book Contribution l tude des propri t s di lectriques de couches minces d oxyde de titane obtenues par pulv risation cathodique r active written by Lisette Lavielle-Muller and published by . This book was released on 1971* with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mineralogy in the Mining Industry written by W. Petruk and published by Elsevier. This book was released on 2000-11-29 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques of performing applied mineralogy investigations, and applications and capabilities of recently developed instruments for measuring mineral properties are explored in this book intended for practicing applied mineralogists, students in mineralogy and metallurgy, and mineral processing engineers. The benefits of applied mineralogy are presented by using in-depth applied mineralogy studies on base metal ores, gold ores, porphyry copper ores, iron ores and industrial minerals as examples. The chapter on base metal ores includes a discussion on the effects of liberation, particle sizes and surfaces coatings of Pb, Cu, Fe, Ca and So4- on the recoveries of sphalerite, galena and chalcopyrite. The chapter on gold discusses various methods of determining the quantities of gold in different minerals, including 'invisible' gold in pyrite and arsenopyrite, so that a balance of the distribution of gold among the minerals can be calculated. This book also discusses the roles of pyrite, oxygen, moisture and bacterial (thiobacillus ferrooxidans) on reactions that produce acidic drainage from tailings piles, and summarizes currently used and proposed methods of remediation of acidic drainage.
Download or read book Geomaterials in Cultural Heritage written by Marino Maggetti and published by Geological Society of London. This book was released on 2006 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers from a session of the 32nd International Geological Congress.
Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by John Wiley & Sons. This book was released on 2009-07-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Download or read book Organic Solid State Lasers written by Sébastien Forget and published by Springer. This book was released on 2013-07-03 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.
Download or read book X Ray and Neutron Reflectivity Principles and Applications written by Jean Daillant and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reflection of and neutrons from surfaces has existed as an x-rays exp- imental for almost it is in the last technique fifty Nevertheless, only years. decade that these methods have become as of enormously popular probes This the surfaces and interfaces. to be due to of several appears convergence of intense different circumstances. These include the more n- availability be measured orders tron and sources that can over (so reflectivity x-ray many of and the much weaker surface diffuse can now also be magnitude scattering of thin films and studied in some the detail); growing importance multil- basic the realization of the ers in both and technology research; important which in the of surfaces and and role roughness plays properties interfaces; the of statistical models to characterize the of finally development topology its and its characterization from on roughness, dependence growth processes The of and to surface scattering experiments. ability x-rays neutro4s study four five orders of in scale of surfaces over to magnitude length regardless their and also their to ability probe environment, temperature, pressure, etc. , makes these the choice for buried interfaces often probes preferred obtaining information about the microstructure of often in statistical a global surfaces, the local This is manner to complementary imaging microscopy techniques, of such studies in the literature witnessed the veritable by explosion published the last few Thus these lectures will useful for over a resource years.
Download or read book Africa Since 1935 written by Unesco. International Scientific Committee for the Drafting of a General History of Africa and published by Univ of California Press. This book was released on 1999 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hardcover edition of volume 8 was published in 1994. This paperback edition is the eighth and final volume to be published in the UNESCO General History of Africa. Volume 8 examines the period from 1935 to the present, and details the role of African states in the Second World War and the rise of postwar Africa. This is one of the most important books in the entire series, and as such, it is an unabridged paperback.
Download or read book Applied Reactor Physics written by Alain Hébert and published by Presses inter Polytechnique. This book was released on 2009 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Canadian Mechanics Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Guinea Vegetation written by K. Paijmans and published by Elsevier Science & Technology. This book was released on 1976 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser 50 Years Of Discoveries written by Fabien Bretenaker and published by World Scientific. This book was released on 2014-10-27 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book provides an overview of the principle and applications of lasers enriched with numerous illustrations.Being over fifty years old, lasers continue to amaze us. Their performance characteristics are constantly reaching new limits, and the scope of their applications continues to expand. Yet, it took years of effort by teams of physicists to transform the fundamental notions of Einstein into the first experimental beam of laser light. And history is still going on as fundamental research is now triggered by its remarkable properties.This book addresses every aspects of laser light, from its fundamental principles to its industrial applications, at a level particularly suited for high school teachers, students, and anybody curious about science and technology.
Download or read book Transport Theory written by James J. Duderstadt and published by John Wiley & Sons. This book was released on 1979 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Problems after each chapter
Download or read book Nuclear Computational Science written by Yousry Azmy and published by Springer Science & Business Media. This book was released on 2010-04-15 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear engineering has undergone extensive progress over the years. In the past century, colossal developments have been made and with specific reference to the mathematical theory and computational science underlying this discipline, advances in areas such as high-order discretization methods, Krylov Methods and Iteration Acceleration have steadily grown. Nuclear Computational Science: A Century in Review addresses these topics and many more; topics which hold special ties to the first half of the century, and topics focused around the unique combination of nuclear engineering, computational science and mathematical theory. Comprising eight chapters, Nuclear Computational Science: A Century in Review incorporates a number of carefully selected issues representing a variety of problems, providing the reader with a wealth of information in both a clear and concise manner. The comprehensive nature of the coverage and the stature of the contributing authors combine to make this a unique landmark publication. Targeting the medium to advanced level academic, this book will appeal to researchers and students with an interest in the progression of mathematical theory and its application to nuclear computational science.
