Download or read book ETUDE DE COUCHES MINCES DIELECTRIQUES PAR ELLIPSOMETRIE SPECTROSCOPIQUE VISIBLE ET INFRAROUGE written by ALINE.. BRUNET BRUNEAU and published by . This book was released on 1996 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL A POUR BUT DE MONTRER LA COMPLEMENTARITE DE L'ELLIPSOMETRIE SPECTROSCOPIQUE DANS L'INFRAROUGE ET DANS LE VISIBLE, POUR OBTENIR UNE CARACTERISATION STRUCTURALE ET OPTIQUE DE MATERIAUX DIELECTRIQUES DEPOSES EN COUCHES MINCES (SIO#XN#Y, SIO#2). L'EVOLUTION AVEC LA CONCENTRATION EN OXYGENE DE LA FORME ET DE LA POSITION DES BANDES DE VIBRATIONS DE COUCHES MINCES DE SIO#XN#Y, OBTENUES PAR PULVERISATION PAR FAISCEAU D'IONS AVEC CROISSANCE DE LA COUCHE ASSISTEE PAR BOMBARDEMENT D'IONS (DIBS), A PU ETRE REPRODUITE DANS LE CADRE DU MODELE DE H.R. PHILIPP, A CONDITION QUE LA FONCTION DIELECTRIQUE DE CHACUN DES 5 TETRAEDRES DE BASE SIO#4##JN#I (J = 0,,4) SOIT BIEN CHOISIE. DANS LE CAS DE COUCHES DE SIO#XN#Y A GRADIENT D'INDICE INTENTIONNEL, L'UTILISATION CONJOINTE DES PARAMETRES ELLIPSOMETRIQUES DANS LE VISIBLE ET DANS L'INFRAROUGE (DOMAINE DE TRANSPARENCE) A PERMIS DE DETERMINER AVEC CERTITUDE LA FORME ET L'AMPLITUDE DU GRADIENT, ALORS QUE LA MULTIPLICATION DES MESURES ELLIPSOMETRIQUES DANS LE VISIBLE A DIFFERENTS ANGLES D'INCIDENCE NE PERMET PAS CETTE DETERMINATION. L'ETUDE COMPARATIVE DE COUCHES MINCES DE SIO#2, OBTENUES PAR TROIS TECHNIQUES DE DEPOT DIFFERENTES (EVAPORATION REACTIVE, EVAPORATION ASSISTEE PAR FAISCEAU D'IONS ET DIBS), A PERMIS DE PROPOSER UN MODELE DE MICROSTRUCTURE DANS LEQUEL LA COUCHE MINCE EST CONSIDEREE COMME UN MILIEU EFFECTIF CONSTITUE D'UNE MATRICE DE SILICE DENSIFIEE ET DE PORES. LA POROSITE DEPEND DES PARAMETRES DE DEPOT. SANS ASSISTANCE, LA POROSITE EST OUVERTE, ELLE EST ALORS RESPONSABLE DU VIEILLISSEMENT IMPORTANT DES COUCHES A L'AIR PAR ADSORPTION DE LA VAPEUR D'EAU DANS LES PORES ET HYDROLYSE DE LA SILICE. DES QU'ON ASSISTE CONVENABLEMENT LA CROISSANCE DE LA COUCHE PAR UN BOMBARDEMENT D'IONS, LA POROSITE EST FERMEE (PORES ISOLES) ET LA COUCHE N'EVOLUE PLUS DANS LE TEMPS. LA MATRICE DE SILICE EST, QUANT A ELLE, JUSTE APRES DEPOT, INDEPENDANTE DE LA METHODE DE DEPOT ; ELLE EST CONSTITUEE D'UN RESEAU DE SILICE NETTEMENT PLUS DENSE QUE CELUI DE LA SILICE FONDUE.

Download or read book ETUDE PAR ELLIPSOMETRIE SPECTROSCOPIQUE ET PHOTOEMISSION X DE LA MORPHOLOGIE DE COUCHES MINCES DIELECTRIQUES OBTENUES PAR EVAPORATION ASSISTEE PAR FAISCEAU D IONS written by DAVID.. SOUCHE and published by . This book was released on 1997 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'EVAPORATION THERMIQUE DONNE DES COUCHES MINCES POREUSES, ABSORBANT UNE IMPORTANTE QUANTITE D'EAU A LEUR SORTIE DE L'EVAPORATEUR. NOUS AVONS UTILISE L'ASSISTANCE IONIQUE A L'OXYGENE POUR COMPACTER DES COUCHES DE TIO#2 ET SIO#2 : POUR UNE ASSISTANCE SUFFISANTE, NOUS AVONS OBTENU DES COUCHES DE COMPACITE ELEVEE, N'ABSORBANT PAS D'EAU A LA MISE A L'AIR. LE DEGRE D'ASSISTANCE EST EXPRIME PAR L'ENERGIE MOYENNE APPORTEE PAR LES IONS A CHAQUE MOLECULE DEPOSEE, E#D. NOUS DISTINGUONS DEUX DOMAINES D'ASSISTANCE IONIQUE, SEPARES PAR UNE ENERGIE DEPOSEE CRITIQUE E#D#T#H. SOUS E#D#T#H, NOUS AVONS OBSERVE UNE AUGMENTATION RAPIDE DE L'INDICE SOUS VIDE AVEC E#D. A LA MISE A L'AIR, L'ASSOCIATION DES ELLIPSOMETRIES VISIBLE ET INFRAROUGE AU SEIN D'UN MODELE DE MORPHOLOGIE A MONTRE POUR SIO#2 L'EFFONDREMENT DES PORES CAPILLAIRES DE LA CROISSANCE COLONNAIRE ET L'APPARITION D'UNE POPULATION DE PORES FERMES. NOUS AVONS SUPPOSE QUE CE DOMAINE EST DOMINE PAR UN MECANISME DE DIFFUSION DE SURFACE EXACERBEE. L'ENERGIE DEPOSEE CRITIQUE E#D#T#H EST DEFINIE PAR LA RUPTURE DE PENTE DE N(E#D). AU-DESSUS DE E#D#T#H, LE GAIN D'INDICE AVEC E#D EST PLUS FAIBLE, TANDIS QUE LA CONTRAINTE DES COUCHES DE TIO#2 DEVIENT COMPRESSIVE ; LES COUCHES MINCES OBTENUES CONTIENNENT TOUJOURS UNE POROSITE RESIDUELLE FERMEE. ENFIN, UNE TROP FORTE ASSISTANCE PROVOQUE DES DEFAUTS ELECTRONIQUES VISIBLES EN XPS. NOUS ASSOCIONS CES COMPORTEMENTS A UNE DENSIFICATION PAR IMPLANTATION D'ATOMES INTERSTITIELS. UN APPORT D'ENERGIE MODERE (E#D100-200EV) PERMET DE RELAXER LA MATRICE DE SIO#2 ET DE DIMINUER LA CRISTALLINITE DES COUCHES DE TIO#2 (T#S#U#B = 150C). PAR CONTRE, POUR LES FORTES VALEURS DE E#D, LA CRISTALLINITE DE TIO#2 REAUGMENTE, ET DEVIENT TRES IMPORTANTE A T#S#U#B = 250C. POUR LES DEUX MATERIAUX ETUDIES, NOUS AVONS PU CORRELER NOS RESULTATS D'XPS AUX MODIFICATIONS STRUCTURALES LIEES A L'ASSISTANCE IONIQUE (CRISTALLISATION, DESORDRE).

Download or read book ETUDE IN SITU DE LA CROISSANCE DE COUCHES MINCES DIELECTRIQUES SUR DIFFERENTS SUBSTRATS PAR ELLIPSOMETRIE ET PHOTOEMISSION X written by YAMIN.. WANG and published by . This book was released on 1995 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL A POUR BUT LA DETERMINATION DES CONSTANTES OPTIQUES DE COUCHES DIELECTRIQUES TRES MINCES DE CAF#2, TIO#2 ET SIO#2 EN FONCTION DE LEUR EPAISSEUR. L'OBJECTIF FINAL EST LA REALISATION DE MILIEUX TRANSPARENTS A MODULATION D'INDICE AVEC LA PROFONDEUR A PARTIR DE DEPOTS ALTERNES DE DEUX MATERIAUX D'INDICES DE REFRACTION DIFFERENTS. POUR CELA, UN SOIN PARTICULIER A ETE APPORTE A L'ETUDE DU MODE DE CROISSANCE DES COUCHES MINCES SUR WAFER DE SILICIUM ET SUR SIO#2 THERMIQUE PAR ELLIPSOMETRIE IN SITU ET PHOTOEMISSION X (XPS). L'INTERFACE CAF#2/SI ET CAF#2/SIO#2 A ETE DECRIT PAR REFERENCE A L'INTERFACE CAF#2/SI (111) POUR LAQUELLE DE NOMBREUX RESULTATS D'XPS ONT ETE PUBLIES. L'ENSEMBLE DES MESURES OPTIQUES, D'XPS ET DE MICROSCOPIE ELECTRONIQUE A HAUTE RESOLUTION (HRMET) A PU ETRE INTERPRETE DE MANIERE COHERENTE DANS LE CAS DE CAF#2/SI EN MONTRANT QUE L'ATTAQUE DE LA COUCHE D'OXYDE NATIF PAR LE FLUOR JOUE UN ROLE IMPORTANT. TOUTES LES COUCHES ETUDIEES PRESENTENT UNE STRUCTURE COLONNAIRE OU POREUSE. POUR CHAQUE MATERIAU, LA CORRELATION ENTRE MORPHOLOGIE, RUGOSITE DE SURFACE ET PROPRIETES OPTIQUES A ETE ETABLIE. L'INTERPRETATION DES TRAJECTOIRES ELLIPSOMETRIQUES PENDANT LA CROISSANCE A ETE FACILITEE PAR LA COMPARAISON AVEC DES SIMULATIONS MONTRANT DES COMPORTEMENTS CARACTERISTIQUES LIES A LA VARIATION DE L'INDICE MOYEN, A LA CROISSANCE D'UNE COUCHE DE SURFACE, A LA PRESENCE D'UNE FAIBLE ABSORPTION, ETC LORS DE LEUR PASSAGE A L'AIR, CES COUCHES SONT LE SIEGE DE MODIFICATIONS QUI SE MANIFESTENT PAR UNE AUGMENTATION DE LEUR INDICE ET DE LEUR EPAISSEUR. L'ADSORPTION D'EAU S'ACCOMPAGNE D'UNE PERTE DE FLUOR DANS CAF#2 ET D'OXYGENE LIE A TI DANS TIO#2

Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.

Download or read book Reactive Sputter Deposition written by Diederik Depla and published by Springer Science & Business Media. This book was released on 2008-06-24 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this valuable work, all aspects of the reactive magnetron sputtering process, from the discharge up to the resulting thin film growth, are described in detail, allowing the reader to understand the complete process. Hence, this book gives necessary information for those who want to start with reactive magnetron sputtering, understand and investigate the technique, control their sputtering process and tune their existing process, obtaining the desired thin films.

Download or read book Low Temperature Plasma Technology written by Paul K. Chu and published by CRC Press. This book was released on 2013-07-15 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a team of pioneering scientists from around the world, Low Temperature Plasma Technology: Methods and Applications brings together recent technological advances and research in the rapidly growing field of low temperature plasmas. The book provides a comprehensive overview of related phenomena such as plasma bullets, plasma penetration into biofilms, discharge-mode transition of atmospheric pressure plasmas, and self-organization of microdischarges. It describes relevant technology and diagnostics, including nanosecond pulsed discharge, cavity ringdown spectroscopy, and laser-induced fluorescence measurement, and explores the increasing research on atmospheric pressure nonequilibrium plasma jets. The authors also discuss how low temperature plasmas are used in the synthesis of nanomaterials, environmental applications, the treatment of biomaterials, and plasma medicine. This book provides a balanced and thorough treatment of the core principles, novel technology and diagnostics, and state-of-the-art applications of low temperature plasmas. It is accessible to scientists and graduate students in low-pressure plasma physics, nanotechnology, plasma medicine, and materials science. The book is also suitable as an advanced reference for senior undergraduate students.

Download or read book Chemically Reacting Flow written by Robert J. Kee and published by John Wiley & Sons. This book was released on 2005-02-18 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex chemically reacting flow simulations are commonly employed to develop quantitative understanding and to optimize reaction conditions in systems such as combustion, catalysis, chemical vapor deposition, and other chemical processes. Although reaction conditions, geometries, and fluid flow can vary widely among the applications of chemically reacting flows, all applications share a need for accurate, detailed descriptions of the chemical kinetics occurring in the gas-phase or on reactive surfaces. Chemically Reacting Flow: Theory and Practice combines fundamental concepts in fluid mechanics and physical chemistry, assisting the student and practicing researcher in developing analytical and simulation skills that are useful and extendable for solving real-world engineering problems. The first several chapters introduce transport processes, primarily from a fluid-mechanics point of view, incorporating computational simulation from the outset. The middle section targets physical chemistry topics that are required to develop chemically reacting flow simulations, such as chemical thermodynamics, molecular transport, chemical rate theories, and reaction mechanisms. The final chapters deal with complex chemically reacting flow simulations, emphasizing combustion and materials processing. Among other features, Chemically Reacting Flow: Theory and Practice: -Advances a comprehensive approach to interweaving the fundamentals of chemical kinetics and fluid mechanics -Embraces computational simulation, equipping the reader with effective, practical tools for solving real-world problems -Emphasizes physical fundamentals, enabling the analyst to understand how reacting flow simulations achieve their results -Provides a valuable resource for scientists and engineers who use Chemkin or similar software Computer simulation of reactive systems is highly effective in the development, enhancement, and optimization of chemical processes. Chemically Reacting Flow helps prepare both students and professionals to take practical advantage of this powerful capability.

Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.

Download or read book Computational Plasma Physics written by Toshi Tajima and published by CRC Press. This book was released on 2018-03-14 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics of plasmas is an extremely rich and complex subject as the variety of topics addressed in this book demonstrates. This richness and complexity demands new and powerful techniques for investigating plasma physics. An outgrowth from his graduate course teaching, now with corrections, Tajima's text provides not only a lucid introduction to computational plasma physics, but also offers the reader many examples of the way numerical modeling, properly handled, can provide valuable physical understanding of the nonlinear aspects so often encountered in both laboratory and astrophysical plasmas. Included here are computational methods for modern nonlinear physics as applied to hydrodynamic turbulence, solitons, fast reconnection of magnetic fields, anomalous transports, dynamics of the sun, and more. The text contains examples of problems now solved using computational techniques including those concerning finite-size particles, spectral techniques, implicit differencing, gyrokinetic approaches, and particle simulation.

Download or read book Multicomponent Flow Modeling written by Vincent Giovangigli and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this is book to give a detailed presentation of multicomponent flow models and to investigate the mathematical structure and properties of the resulting system of partial differential equations. These developments are also illustrated by simulating numerically a typical laminar flame. Our aim in the chapters is to treat the general situation of multicomponent flows, taking into account complex chemistry and detailed transport phe nomena. In this book, we have adopted an interdisciplinary approach that en compasses a physical, mathematical, and numerical point of view. In par ticular, the links between molecular models, macroscopic models, mathe matical structure, and mathematical properties are emphasized. We also often mention flame models since combustion is an excellent prototype of multicomponent flow. This book still does not pretend to be a complete survey of existing models and related mathematical results. In particular, many subjects like multi phase-flows , turbulence modeling, specific applications, porous me dia, biological models, or magneto-hydrodynamics are not covered. We rather emphasize the fundamental modeling of multicomponent gaseous flows and the qualitative properties of the resulting systems of partial dif ferential equations. Part of this book was taught at the post-graduate level at the Uni versity of Paris, the University of Versailles, and at Ecole Poly technique in 1998-1999 to students of applied mathematics.

Download or read book Thin Film Deposition Principles and Practice written by Donald L. Smith and published by McGraw Hill Professional. This book was released on 1995-03-22 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product.

Download or read book Our Changing Planet written by Fred T. Mackenzie and published by . This book was released on 2003 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a general, interdisciplinary discussion of global environmental change oriented toward the non-specialist in science.The unifying theme of the book is consideration of aspects of both natural and human-induced global environmental change. The two part organization according to this distinction allows for easy reading on specific topics.This book is useful for anyone interested in learning more about Earth's systems.

Download or read book Diffusion in Materials DIMAT 2011 written by Igor Bezverkhyy and published by Trans Tech Publications Ltd. This book was released on 2012-04-12 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Diffusion in Materials (DIMAT) is the benchmark conference series for diffusion in solids. DIMAT 2011 was organized by the University of Bourgogne in association with CNRS, Dijon (France). The conference showcased new results concerning theoretical tools as well as applied research approaches. Diffusion processes affect all types of materials: nanomaterials, materials for energy, metallurgy, glasses and ceramics, but each requires its own numerical tools. Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume comprises most of the contributions presented at DIMAT 2011: 4 plenary lectures delivered by famous high-level scientists plus 88 contributions in the form of keynote lectures, talks and posters.

Download or read book Encyclopedia of Surface and Colloid Science written by P. Somasundaran and published by CRC Press. This book was released on 2006 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.

Download or read book Advances in Low Temperature Rf Plasmas written by Toshiaki Makabe and published by Elsevier Publishing Company. This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low temperature plasmas have had a very broad range of applications ever since their discovery. However, recent developments in the dextrous handling of dry etching non-equilibrium plasma have attracted a great common interest that has driving force behind the major developments in diagnostic, theoretical and numerical techniques since the 1980s. A greater fundamental understanding of the kinetics of radio-frequency (rf) plasmas and their interaction with surfaces in regard to the process of large scale integrated circuits has been achieved through the cooperation between academia and industry. At the same time, new applications have become possible, and the basic understanding of low temperature rf plasmas has diffused to other areas of plasma physics. in the special issue of Applied Surface Science, which is published in memory of the International Workshop on Basis for Low Temperature Plasma Applications at Hakone in Japan on July 24 - 25 of 2001. The basic goal in the selection of topics was to cover the range of issues that represent the building blocks of the complex, vertically integrated plasma simulation schemes including surface processes. The text also shows examples of integrated codes and how they are implemented in the development of new strategies of plasma processing. Such codes may be used both in modern experiments and in the computer aided design and control of the plasma devices of the next generation. These are based on the transport theory of electrons, ions and neutrals, as well as on numerical modellings and on the available collision and transport data describing gas and surface phases. density plasmas. All the chapters present a relatively complete review of the developments in these fields since the 1980s as well as a review of their status of development in 2002, and there is a blend of research reviews from both academia and industry.

Download or read book Solar Cells and Light Management written by Francesco Enrichi and published by Elsevier. This book was released on 2019-10-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar Cells and Light Management: Materials, Strategies and Sustainability provides an extensive review on the latest advances in PV materials, along with light management strategies for better exploiting the solar spectrum. Following a brief review of the current status of solar cells, the book discusses different concepts, principles and technologies for solar devices, starting with standard silicon cells and then covering organic-hybrid, DSSC, perovskite, quantum dots and nanostructured oxide solar cells. Other sections focus on light manipulation and spectral modification, materials for spectral conversion, and environmental and sustainably considerations. An emergy analysis, which is an extension of the Life Cycle Assessment methodology, is applied to the study of solar PV systems, thus allowing for effective integrated indicators.