Caractérisation de couches minces nanostructurées par ellipsométrie spectroscopique PDF Download

Author: Mickaël Gilliot (Christophe, Patrick)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 222

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Book Description
Des couches minces constituées de nanostructures de cobalt de taille caractéristique de 4 à 110 nanomètres, obtenues après implantation d’ions Co+ dans une couche mince de silice sur substrat de silicium, ont été caractérisées par ellipsométrie spectroscopique. Un modèle optique permet de rendre compte précisément de la structure de la couche implantée. Après une étude exhaustive des différents effets tels que profil d’implantation, effet de taille, oxydation des particules et défauts d’irradiation dans la silice, il a été montré que la couche nanostructurée peut être représentée pour une couche effective constituée d’un mélange de nanograins de cobalts et de silice contenue entre deux couches de silice. Les perspectives et applications offertes par ce modèle sont très nombreuses. Il sert notamment à l’étude des couches nanostructurées composées de structures de cobalt de forme ovoïde par ellipsométrie généralisée. Des méthodes instrumentales et théoriques spécifiques à l’anisotropie ont été développées. Un lien entre l’anisotropie de forme et l’anisotropie optique a été établi. L’ellipsométrie permet d’accéder à la géométrie de l’échantillon ainsi que d’étudier avec précision les propriétés d’anisotropie optique de particules ovoïdes et d’anisotropie magnéto-optique mises à profit dans le futurs dispositifs de stockage de données.

Author: André Ayral
Publisher:
ISBN: 9782271064301
Category : Ellipsometry
Languages : en
Pages : 181

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Book Description
Les couches minces ou très minces (d'épaisseurs comprises entre seulement quelques micromètres et quelques nanomètres) sont omniprésentes dans notre environnement, que ce soit à l'état naturel, dans les mondes du vivant et minéral, ou à l'état synthétique, dans les objets manufacturés : membranes biologiques, couches d'altération, revêtements de protection, films à propriétés conductrices ou isolantes, couches colorées, membranes synthétiques, capteurs. Leurs propriétés d'usage dépendent à la fois de leur composition chimique globale et de leur microstructure. L'optimisation de ces propriétés nécessite donc une caractérisation fine de la microstructure. Cependant leur faible épaisseur rend particulièrement complexe cette opération. Cet ouvrage présente différentes techniques de caractérisation fondées sur l'analyse des interactions entre la matière et un faisceau électromagnétique ou neutronique. Il expose les bases théoriques et les derniers développements des techniques ellipsométriques, de réflectométrie (X, neutronique et optique) et de diffraction des rayons X. Les auteurs des différents chapitres, spécialistes reconnus, proposent des textes synthétiques assortis de références bibliographiques à partir desquelles le lecteur pourra approfondir ses connaissances. Cet ouvrage sera ainsi fort utile à tous les ingénieurs, chercheurs et étudiants souhaitant s'initier ou se perfectionner aux techniques de caractérisation de films minces.

Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659

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Book Description
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.

Author: Diederik Depla
Publisher: Springer Science & Business Media
ISBN: 3540766642
Category : Technology & Engineering
Languages : en
Pages : 584

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Book Description
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.

Author: Paolo Mele
Publisher:
ISBN: 9781536160864
Category : Zinc oxide thin films
Languages : en
Pages : 0

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Book Description
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.

Author: Gabriel Popescu
Publisher:
ISBN:
Category : Diagnostic imaging
Languages : en
Pages :

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Book Description
'Proceedings of SPIE' presents the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields.

Author: Agnes Buka
Publisher: World Scientific
ISBN: 1848167997
Category : Science
Languages : en
Pages : 299

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Book Description
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.

Author: Donald L. Smith
Publisher: McGraw Hill Professional
ISBN: 9780070585027
Category : Technology & Engineering
Languages : en
Pages : 648

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Book Description
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.

Author: Jean-Marie Basset
Publisher: John Wiley & Sons
ISBN: 3527627103
Category : Science
Languages : en
Pages : 725

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Book Description
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.

Author: Sina Ebnesajjad
Publisher: William Andrew
ISBN: 1455731153
Category : Technology & Engineering
Languages : en
Pages : 413

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Book Description
The value of the groceries purchases in the USA is over $500 billion annually, most of which is accounted for by packaged foods. Plastic packaging of foods is not only ubiquitous in developed economies, but increasingly commonplace in the developing world, where plastic packaging is instrumental in decreasing the proportion of the food supply lost to spoilage. This new handbook is a combination of new material and updated chapters, chosen by Dr. Sina Ebnesajjad, from recently published books on this subject. Plastic Films in Food Packaging offers a practical handbook for engineers, scientists and managers working in the food packaging industry, providing a tailor-made package of science and engineering fundamentals, best practice techniques and guidance on new and emerging technologies. By covering materials, design, packaging processes, machinery and waste management together in one book, the authors enable the reader to take a lifecycle approach to food packaging. The Handbook addresses questions related to film grades, types of packages for different types of foods, packaging technologies, machinery and waste management. Additionally the book provides a review of new and emerging technologies. Two chapters cover the development of barrier films for food packaging and the regulatory and safety aspects of food packaging. - Essential information and practical guidance for engineers and scientists working at all stages of the food packaging lifecycle: from design through manufacture to recycling - Includes key published material on plastic films in food packaging, updated specifically for this Handbook, and new material on the regulatory framework and safety aspects - Coverage of materials and applications together in one handbook enables engineers and scientists to make informed design and manufacturing decisions