Download or read book tude de l interaction de l hydrog ne avec les couches minces de carbone amorphe hydrog n a C H written by Amine Erradi and published by . This book was released on 2011 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse porte sur l'interaction de l'hydrogène avec des couches de carbone amorphe hydrogéné (a-C:H) dans le cadre du dépôt de ces couches à basse pression dans les réacteurs plasma RCE. Dans ce type de décharge en plasma d'acétylène comme en plasma de méthane à temps de résidence élevé, il se forme des poudres dans le volume du réacteur. Ces nanoparticules en s'incorporant dans le dépôt, lui confère des propriétés optiques, mécaniques ou biologiques interéssantes selon les conditions experimentales du dépôt. Dans ce travail, nous nous sommes interéssés plus particulièrement au mécanisme de l'érosion du dépôt a-C:H par l'hydrogène car il produit les précurseurs de la formation de poudres. Dans ce travail de thèse, l'érosion a été étudiée en post-décharge en fonction de la température et du flux d'hydrogène. Nous avons mis en évidence l'établissement d'un régime permanent précédé d'un régime transitoire qui diminu en augmentant la température ou le flux d'hydrogène. L'étude de l'érosion a également été effectuée en utilisant des outils de diagnostic du matériau tels que l'ellipsométrie spectroscopique et la spectroscopie FTIR pour caractériser de manière qualitative la modification des couches a-C:H soumises à un flux d'hydrogène. Ceci a permis de mettre en évidence une modification de la couche sur une faible épaisseur et l'hydrogénation préferentielle des liaisons sp2 de la couche. Les espèces volatiles produites par érosion des couches a-C:H ont été identifiées en utilisant la spectrométrie de masse et la méthode des potentiels d'apparition près du seuil. Les résultats ont montré que le radical méthyle est le produit principal de l'érosion avec des espèces lourdes mais pas d'acétylène. L'érosion a également été étudiée en plasma de H2 et de CH4 en utilisant la spectrométrie de masse et la sonde de Langmuir. La production de l'acétylène dans les deux cas montre que l'interaction de l'hydrogène avec le dépôt a-C:H aux parois forme des espèces qui peuvent se dissocier dans le plasma et former l'acétylène. En effet, en plasma de méthane à temps de résidence élevé, l'érosion par les atomes d'hydrogène du dépôt en cours de croissance sur les parois du réacteur produit des espèces volatiles CxHy. De retour dans la décharge, les espèces C2 peuvent être dissociées et former de l'acétylène en quantité suffisante. L'acétylène est à l'origine des ions négatifs C2H- qui subissent l'influence du champ magnétique de la source RCE. Ceci leur permet d'augmenter leur probabilité de recombinaison en volume (nucléation, aggrégation, coalescence..) conduisant à la formation de poudres carbonées.
Download or read book ETUDE DE LA CROISSANCE DE COUCHES DE CARBONE AMORPHE HYDROGENE written by JIRI.. SPOUSTA and published by . This book was released on 1994 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES TRAVAUX RAPPORTES DANS CE MEMOIRE CONCERNENT L'ETUDE DE LA CROISSANCE ET DES PROPRIETES DE FILMS MINCES DE CARBONE AMORPHE HYDROGENE, FORMES PAR DEPOT ASSISTE PAR PLASMA DANS UNE DECHARGE DE TYPE MULTIPOLAIRE. NOUS DECRIVONS D'ABORD LE SYSTEME PLASMA MULTIPOLAIRE UTILISE POUR LA CROISSANCE DES FILMS, AINSI QUE L'ENSEMBLE DES TECHNIQUES D'ANALYSE NOUS AYANT DONNE ACCES A LA COMPOSITION (MICROANALYSES NUCLEAIRES) ET AUX PROPRIETES PHYSIQUES DE CES FILMS (ABSORPTION OPTIQUE ET INFRA ROUGE, EFFET RAMAN, ELLIPSOMETRIE). LE CHAPITRE III EST CONSACRE AUX PROPRIETES DES FILMS DE CARBONE AMORPHE HYDROGENE QUE NOUS AVONS FORMES. EN PARTICULIER, NOUS NOUS SOMMES INTERESSES A LA CORRELATION ENTRE CONCENTRATION EN HYDROGENE ET PROPRIETES PHYSIQUES. LE CHAPITRE IV EST CONSACRE A L'EFFET DES IONS DURANT LA CROISSANCE. L'ENERGIE DE CES IONS A ETE LE PARAMETRE PRIVILEGIE, MAIS LA NATURE DES IONS AINSI QUE LES DIFFERENTES ETAPES DE LA CROISSANCE ONT FAIT EGALEMENT L'OBJET D'ETUDE. LES RESULTATS DE CES ETUDES ONT ETE COMPAREES AUX ESTIMATIONS DES EFFETS DES IONS DEDUITS D'UN PROGRAMME DE SIMULATION. DANS LE CHAPITRE V, NOUS AVONS ETUDIE DES TRANSFORMATIONS DES FILMS DE CARBONE AMORPHE. CE COMPOSE EST METASTABLE ET PEUT ETRE AISEMENT MODIFIE PAR UN APPORT D'ENERGIE. C'EST LE CAS LORS DE LA CROISSANCE ELLE MEME, MAIS CECI PEUT EGALEMENT ETRE ENVISAGE LORS DE TRAITEMENTS POSTERIEURS AU DEPOT. L'EFFET D'IRRADIATIONS PAR UN LASER PULSE A DONC ETE ETUDIE, ET COMPARE AU CAS PLUS CLASSIQUE DE RECUITS THERMIQUES RAPIDES.
Download or read book Contribution l tude des propri t s m caniques des m taux du groupe V A en atmosph re d hydrog ne written by Jacques Schmuck and published by . This book was released on 1970 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Poly lactic acid Science and Technology written by Alfonso Jiménez and published by Royal Society of Chemistry. This book was released on 2015 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of the synthesis, characterisation, properties and applications of poly(lactic acid) science and technology covering scientific, ecological, social and economic issues.
Download or read book A German English Dictionary for Chemists written by Austin M 1876-1956 Patterson and published by Scholar Select. This book was released on 2015-08-08 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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 Dynamic Behavior of Materials Volume 1 written by Bo Song and published by Springer. This book was released on 2015-10-23 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Behavior of Materials, Volume 1 represents the first of nine volumes of technical papers presented at the Society for Experimental Mechanics SEM 15th International Congress & Exposition on Experimental and Applied Mechanics, held at Costa Mesa, California, June 8-11, 2015. The full set of proceedings also includes volumes on: Challenges in Mechanics of Time Dependent Materials, Advancement of Optical Methods in Experimental Mechanics, Experimental and Applied Mechanics 16th International Symposium on MEMS and Nanotechnology, 5th International Symposium on the Mechanics of Biological Systems and Materials, International Symposium on the Mechanics of Composite and Multi-functional Materials, Fracture, Fatigue, Failure and Damage Evolution; and Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems.
Download or read book A Phonetic Dictionary of the English Language written by Hermann Michaelis and published by . This book was released on 1913 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Philostratus written by Philostratus (the Athenian) and published by . This book was released on 1912 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analecta Or Materials For a History of Remarkable Providences Mostly Relating to Scotch Ministers and Christians written by Robert Wodrow and published by BoD – Books on Demand. This book was released on 2024-05-25 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reprint of the original, first published in 1842.
Download or read book Cambridge Yearbook of European Legal Studies Vol 13 2010 2011 written by Catherine Barnard and published by Bloomsbury Publishing. This book was released on 2011-12-15 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cambridge Yearbook of European Legal Studies provides a forum for the scrutiny of significant issues in EU Law, the law of the European Convention on Human Rights, and Comparative Law with a 'European' dimension, and particularly those issues which have come to the fore during the year preceding publication. The contributions appearing in the collection are commissioned by the Centre for European Legal Studies (CELS) Cambridge, a research centre in the Law Faculty of the University of Cambridge specialising in European legal issues. The papers presented are at the cutting edge of the fields which they address, and reflect the views of recognised experts drawn from the University world, legal practice, and the institutions of both the EU and its Member States. Inclusion of the comparative dimension brings a fresh perspective to the study of European law, and highlights the effects of globalisation of the law more generally, and the resulting cross fertilisation of norms and ideas that has occurred among previously sovereign and separate legal orders. The Cambridge Yearbook of European Legal Studies is an invaluable resource for those wishing to keep pace with legal developments in the fast moving world of European integration. INDIVIDUAL CHAPTERS Please click on the link below to purchase individual chapters from Volume 13 through Ingenta Connect: www.ingentaconnect.com SUBSCRIPTION TO SERIES To place an annual online subscription or a print standing order through Hart Publishing please click on the link below. Please note that any customers who have a standing order for the printed volumes will now be entitled to free online access. www.hartjournals.co.uk/cyels/subs Editorial Advisory Board: Albertina Albors-Llorens, John Bell, Alan Dashwood, Simon Deakin, David Feldman, Richard Fentiman, Angus Johnston, John Spencer Founding Editors: Alan Dashwood and Angela Ward Ius Commune Prize 2012 Alexandre Saydé wrote Chapter 15 in this volume entitled: 'One Law, Two Competitions: An Enquiry into the Contradictions of Free Movement Law' and we are delighted to announce that he has been awarded the Ius Commune Prize 2012.
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 Socialism Perestroika and the Dilemmas of Soviet Economic Reform written by John E Tedstrom and published by Routledge. This book was released on 2021-12-13 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights that Soviet economic planners and politicians must come to recognize the need to make fundamental changes, not simply incremental refinements, in the failing Soviet system. It examines the dynamics of the process of perestroika and the complexity of individual economic issues.
Download or read book The Ladybird Illustrated written by D H Lawrence and published by . This book was released on 2020-11-09 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Ladybird is a long tale or novella by D. H. Lawrence. It was first drafted in 1915 as a short story entitled The Thimble. Lawrence rewrote and extended it under a new title in December 1921 and sent the final version to his English agent on 9 January 1922. It was collected with two other tales, The Captain's Doll and The Fox, and the three novellas were then published in London by Martin Secker in March 1923 under the title The Ladybird and in New York by Thomas Seltzer as The Captain's Doll in April 1923."
Download or read book Notes on the Minor Prophets written by Henry Allan Ironside and published by . This book was released on 1955 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
