Download or read book CARACTERISATION PAR ELLIPSOMETRIE UV VIS ET SPECTROSCOPIE INFRAROUGE DE FILMS AMORPHES written by MURIEL.. FIRON and published by . This book was released on 1994 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES ISOLANTS (SIO#2, SI#3N#4) SONT UTILISES SOIT POUR PASSIVER LA SURFACE DES SEMI-CONDUCTEURS, SOIT POUR ISOLER ELECTRIQUEMENT LES CONDUCTEURS. L'ASSOCIATION DE SIO#2 ET SI#3N#4 PERMET D'OBTENIR UN BON ISOLANT DONT LES CONTRAINTES MECANIQUES SONT FAIBLES: L'OXYNITRURE DE SILICIUM (SIO#XN#Y). LES PROPRIETES PHYSICO-CHIMIQUES DE CES FILMS, DEPOSES PAR PLASMA (PECVD), DEPENDENT ESSENTIELLEMENT DE LEUR COMPOSITION CHIMIQUE. AFIN DE LA DETERMINER, NOUS AVONS UTILISE PLUSIEURS TECHNIQUES SPECTROSCOPIQUES. LA DETERMINATION DE LA COMPOSITION CHIMIQUE PAR XPS NECESSITE D'ELIMINER LA CONTAMINATION SUPERFICIELLE DES FILMS PAR EROSION IONIQUE A L'ARGON. CETTE METHODE EST DESTRUCTIVE ET PERTURBE LA MESURE DE LA COMPOSITION CHIMIQUE. L'ELLIPSOMETRIE SPECTROSCOPIQUE UV-VIS. PERMET UNE ANALYSE NON DESTRUCTIVE DE LA TOTALITE DU FILM. LA COMPOSITION CHIMIQUE DES OXYNITRURES DE SILICIUM EST CALCULEE A L'AIDE DU MODELE DE BRUGGEMAN. LE RESULTAT DE CETTE MESURE N'EST QU'UNE ESTIMATION. DANS CE MODELE, L'OXYNITRURE DE SILICIUM EST CONSIDERE COMME UN MELANGE DE DEUX PHASES DISTINCTES (SIO#2 ET SI#3N#4), CEPENDANT LES RESULTATS ELLIPSOMETRIQUES SONT REPRODUCTIBLES. LES RESULTATS DE CES DEUX TYPES DE MESURES SONT SOUS ESTIMES PAR RAPPORT A CEUX DE L'ANALYSE PAR REACTION NUCLEAIRE. NOUS AVONS MONTRE QUE L'ANALYSE QUANTITATIVE ET L'ARRANGEMENT ATOMIQUE PEUVENT ETRE DEDUITS DES SPECTRES INFRAROUGES EN TRANSMISSION (FILMS MINCES) ET EN REFLEXION POLARISEE (FILMS ULTRAMINCES), POURVU QUE L'ON DISPOSE D'UN MODELE APPROPRIE. DANS LE CAS DU FILM DE SIO#XN#Y PUR, IL EXISTE DES MODELES QUI PERMETTENT DE DECRIRE DE MANIERE SATISFAISANTE LA REPARTITION DES ATOMES DANS LES MATERIAUX ET PEUVENT ETRE UTILISES POUR DEDUIRE LA COMPOSITION CHIMIQUE, A PARTIR DE LA POSITION DES BANDES DE VIBRATION. EN PRATIQUE, DE L'HYDROGEENE EST LE PLUS SOUVENT PRESENT DANS LES FILMS D'OXYNITRURE DE SILICIUM. IL EST EN EFFET DIFFICILE DE S'AFFRANCHIR DE SA PRESENCE. IL N'EXISTE ACTUELLEMENT AUCUN MODELE QUI PRENNE EN COMPTE LA PRESENCE D'HYDROGENE ; NOUS AVONS SUGGERE LES MODIFICATIONS QU'IL FAUT APPORTER AU MODELE EXISTANT POUR EN TENIR COMPTE

Download or read book Introduction to Spectroscopic Ellipsometry of Thin Film Materials written by Andrew T. S. Wee and published by John Wiley & Sons. This book was released on 2022-03-08 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: A one-of-a-kind text offering an introduction to the use of spectroscopic ellipsometry for novel material characterization In Introduction to Spectroscopic Ellipsometry of Thin Film Materials: Instrumentation, Data Analysis and Applications, a team of eminent researchers delivers an incisive exploration of how the traditional experimental technique of spectroscopic ellipsometry is used to characterize the intrinsic properties of novel materials. The book focuses on the scientifically and technologically important two-dimensional transition metal dichalcogenides (2D-TMDs), magnetic oxides like manganite materials, and unconventional superconductors, including copper oxide systems. The distinguished authors discuss the characterization of properties, like electronic structures, interfacial properties, and the consequent quasiparticle dynamics in novel quantum materials. Along with illustrative and specific case studies on how spectroscopic ellipsometry is used to study the optical and quasiparticle properties of novel systems, the book includes: Thorough introductions to the basic principles of spectroscopic ellipsometry and strongly correlated systems, including copper oxides and manganites Comprehensive explorations of two-dimensional transition metal dichalcogenides Practical discussions of single layer graphene systems and nickelate systems In-depth examinations of potential future developments and applications of spectroscopic ellipsometry Perfect for master’s- and PhD-level students in physics and chemistry, Introduction to Spectroscopic Ellipsometry of Thin Film Materials will also earn a place in the libraries of those studying materials science seeking a one-stop reference for the applications of spectroscopic ellipsometry to novel developed materials.

Download or read book How Glass Changed the World written by Seth C. Rasmussen and published by Springer Science & Business Media. This book was released on 2012-02-23 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glass production is thought to date to ~2500 BC and had found numerous uses by the height of the Roman Empire. Yet the modern view of glass-based chemical apparatus (beakers, flasks, stills, etc.) was quite limited due to a lack of glass durability under rapid temperature changes and chemical attack. This “brief” gives an overview of the history and chemistry of glass technology from its origins in antiquity to its dramatic expansion in the 13th century, concluding with its impact on society in general, particularly its effect on chemical practices.

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 Canadian Journal of Physics written by and published by . This book was released on 2003-07 with total page 628 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 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 Well Architectured Fluoropolymers Synthesis Properties and Applications written by Bruno Ameduri and published by Elsevier. This book was released on 2004-07-07 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the increasing need for ever better performing materials endowed with specific properties, macromolecular engineering has become a useful tool for designing well-architectured polymers (telomers, telechelics, stars, dendrimers, alternating, block- and graftcopolymers). These polymers are nowadays seeing an enormous growth. Among them, fluoropolymers are seen as high value added materials in many applications ranging from surfactants, optical fibers, biomaterials, coatings, to membranes for fuel cells. Indeed, the relationship between structure of the monomer to the properties of the polymers is of increasing interest so that these properties are tuned for the most appropriate applications. As most fluoropolymers are prepared from radical synthesis, this book devotes various parts on the use of the controlled radical (or pseudo-living) polymerisation of fluoromonomers leading to discoveries of thermoplastic elastomers or original surfactants for polymerisation in supercritical CO2. Well-Architectured Fluoropolymers: Synthesis, Properties and Applications is composed of five chapters starting with a general introduction outlining basic concepts. Emphasis is placed on recent developments, and each chapter describes comprehensive techniques of synthesis of well-defined fluorotelomers or polymers, their properties, characterisations, and their applications, for immediate use by today's engineers, industrial and academic scientists, and researchers. The book has been arranged to enable self-managed reading and learning. It is both a source of data and a reference. - On the synthesis, properties and applications of fluoropolymers: remarkable, high value added materials applied in surfactants, optical fibres, biomaterials, coatings and membranes for fuel cells - For immediate use by today's engineers, industrial and academic scientists, and researchers - Written to enable self-managed reading and learning, being both a source of data and a reference

Download or read book Macromolecular Engineering written by Alex Lubnin and published by Elsevier. This book was released on 2021-02-26 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Macromolecular Engineering: Design, Synthesis and Application of Polymers explores the role of macromolecular engineering in the development of polymer systems with engineered structures that offer the desired combination of properties for advanced applications. This book is organized into sections covering theory and principles, science and technology, architectures and technologies, and applications, with an emphasis on the latest advances in techniques, materials, properties, and end uses - and including recently commercialized, or soon to be commercialized, designed polymer systems. The chapters are contributed by a group of leading figures who are actively researching in the field. This is an invaluable resource for researchers and scientists interested in polymer synthesis and design, across the fields of polymer chemistry, polymer science, plastics engineering, and materials science and engineering. In industry, this book supports engineers, R&D, and scientists working on polymer design for application areas such as biomedical and healthcare, automotive and aerospace, construction and consumer goods. Presents the theory, principles, architectures, technologies, and latest advances in macromolecular engineering for polymer design and synthesis Explains polymer design for cutting-edge applications areas, including coatings, automotive, industrial, household and medical uses Approaches several novel materials, such as polyisobutylene (PIB), polyamide-based polyurethanes, and aliphatic polyesters

Download or read book Materials that Move written by Murat Bengisu and published by Springer. This book was released on 2018-04-25 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a design-driven investigation into smart materials developed by chemists, physicists, materials and chemical engineers, and applied by designers to consumer products, buildings, interfaces, or textiles. Introducing a class of smart materials (referred to as stimuli-responsive, morphing or kinetic materials) that move and change their shape in response to stimuli, the book presents their characteristics, advantages, potentials, as well as the difficulties involved in their application. The book also presents a large number of case studies on products, projects, concepts, and experiments employing smart materials, thus mapping out new design territories for these innovative materials. The case studies involve different fields of design, including product, interior, fashion, and communication design. Reflecting the growing demand for sustainable and human-centered design agendas, the book explores and reveals the role and influence of these new materials and technologies on design and human experience, and discusses how they can be used to redefine our objects and spaces so as to promote more resilient environments. The book offers an intriguing and valuable resource for design professionals, engineers, scientists and students alike.

Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.

Download or read book Forest Fire Research written by Universidade de Coimbra and published by . This book was released on 2010 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Living and Controlled Polymerization written by Joseph Jagur-Grodzinski and published by Nova Publishers. This book was released on 2006 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: The living/controlled polymerisation techniques opened new vistas in polymer chemistry. The leading authorities in this field and its pioneers contributed chapters to this collective volume. The controlled polymerisation techniques have enabled preparation of polymers, copolymers, and block copolymers with predetermined molecular weights and narrow polydispersity, in which functional groups or biologically active molecules could be placed at well defined locations. They have also enabled preparation of advanced polymeric structures with precisely determined architectures and improved properties. Moreover, they have provided opportunities for preparation of novel polymeric materials from monomers, which before have not been suitable or accessible for such purposes. Properties of some of these polymeric materials may be significantly different from those of the existing ones. They provide opportunities for new applications. Several patents have already been approved for such speciality applications as, drug delivery, biocompatible surfaces, thermoplastic elastomers, moisture curable sealants, and so on. Many more products, based on polymers fabricated by the living/ controlled polymerisation techniques, will certainly emerge in such specialised areas as, nanotechnology, medical devices, "smart polymers", sensors , smart separation technologies, optical fibres and other optical applications, various biomaterials, etc.

Download or read book Conjugated Conducting Polymers written by Helmut Kiess and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the current understanding of electronic, optical and magnetic properties of conjugated polymers in both the semiconducting and metallic states. It introduces in particular novel phenomena and concepts in these quasi one-dimensional materials that differ from the well-established concepts valid for crystalline semiconductors. After a brief introductory chapter, the second chapter presents basic theore tical concepts and treats in detail the various models for n-conjugated polymers and the computational methods required to derive observable quantities. Specific spatially localized structures, often referred to as solitons, polarons and bipolarons, result naturally from the interaction between n-electrons and lattice displacements. For a semi-quantitative understanding of the various measure ments, electron-electron interactions have to be incorporated in the models; this in turn makes the calculations rather complicated. The third chapter is devoted to the electrical properties of these materials. The high metallic conductivity achieved by doping gave rise to the expression conducting polymers, which is often used for such materials even when they are in their semiconducting or insulating state. Although conductivity is one of the most important features, the reader will learn how difficult it is to draw definite conclusions about the nature of the charge carriers and the microscopic transport mechanism solely from electrical measurements. Optical properties are discussed in the fourth chapter.