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Synthese Caracterisation Et Spectroscopie De Nanoparticules De Co Et Coeur Co
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Book Synopsis Synthèse, caractérisation et spectroscopie de nanoparticules de Co et (coeur) Co by : Salvatore Costanzo
Download or read book Synthèse, caractérisation et spectroscopie de nanoparticules de Co et (coeur) Co written by Salvatore Costanzo and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'un des enjeux actuels dans le domaine de la chimie des nanomatériaux est de développer des stratégies visant à contrôler la synthèse, l'organisation et la réactivité de nanoparticules (NPs) métalliques, y compris sous forme cœur (métal)@coquille (oxyde(s)). Dans ce contexte, en revisitant la synthèse par voie micellaire, a été établi une stratégie basée sur la modification des interactions ligand-ligand contrôlées par le solvant, suivant la modélisation de la solubilité de Hansen, afin de contrôler de la taille des NPs de cobalt entre 3,8 nm et 9,1 nm (mesure MET). De l'acide dodécanoïque passive les NPs et protège de l'oxydation et de la coalescence. Des monocouches en réseau hexagonal et des supercristaux cfc ont été obtenus. En utilisant deux méthodes d'oxydation combinées à des recuits, par voie sèche et en solution, des NPs coeur/coquille [Co(ferro)@CoO(antiferromagnétique)] ont été préparées avec un cœur métallique polycristallin cfc ou monocristallin hcp. L'étude préliminaire des propriétés magnétiques (mesures SQUID) montre que l'interface Co/CoO favorise une interaction d'échange ferromagnétique/antiferromagnétique faible. La spectroscopie Raman, méthode non-invasive, sous différentes excitations laser permet d'analyser simultanément la particule métallique (contrôle de la phase et mesure des diamètres à partir des modes de Lambs), l'agent passivant et les éventuelles coquilles d'oxyde (CoO/CoOH, Co3O4) ainsi que la dynamique des chaines dodécanoates. L'analyse infrarouge indique une hydroxylation des NPs non oxydées. Les techniques vibrationnelles apparaissent bien adaptées au contrôle multi-échelle des assemblées et supracristaux de NPs.
Book Synopsis Synthèse et caractérisation des nanoparticules spinelles et coeur-coquille à base d'oxyde de fer et de cobalt by : Walid Baaziz
Download or read book Synthèse et caractérisation des nanoparticules spinelles et coeur-coquille à base d'oxyde de fer et de cobalt written by Walid Baaziz and published by . This book was released on 2011 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les objectifs de cette thèse sont de synthétiser et d’étudier les propriétés structurales et magnétiques de nanoparticules (NPs) d’oxydes de fer et de ferrite de cobalt de différentes tailles, morphologie et compositions, et notamment des structures cœur-coquille. La méthode de synthèse choisie est la décomposition thermique d’un stéarate de fer dans un solvant à haute température d’ébullition en présence de surfactants. Dans une première partie centrée sur les nanoparticules d’oxyde de fer, les conditions expérimentales de synthèse ont été optimisées pour obtenir des NPs sphériques d’oxyde de fer de taille moyenne comprise entre 5 et 28 nm. Nous avons étudié l’évolution de la composition et des propriétés magnétiques des NPs en fonction de leur taille et de la nature de l’atmosphère de synthèse. Puis, en variant d’autres paramètres de la méthode de synthèse, nous avons réussi à contrôler la morphologie et la composition des NPs : des NPs de morphologie cubique ont été obtenues avec des tailles entre 13-30 nm avec une composition homogène et une composition cœur-coquille FeO@Fe3-xO4 présentant des propriétés d’exchange-bias. Dans une seconde partie, nous nous sommes centrés sur l’élaboration de ferrite de cobalt et de structure mixte cœur-coquille, des NPs de composition homogène CoFe2O4 et de composition cœur–coquille d CoxFe1-x@CoFe2O4 et Fe3-xO4@CoO. Des interactions d’échange antiferromagnétique/ferrimagnétique ont été mises en évidence dans les deux structures cœur-coquille. Enfin, nous avons réussi à contrôler la synthèse de NPs sphériques d’oxyde de fer sur la surface ou à l’intérieur de nanotubes de carbone (NTCs) et à synthétiser des NPs à base de cobalt de morphologie cubique à l’intérieur des NTCs. Nous avons montré que le NTC joue le rôle de « nanoréacteur ».
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.
Book Synopsis Proton Conductors by : Philippe Colomban
Download or read book Proton Conductors written by Philippe Colomban and published by Cambridge University Press. This book was released on 1992-09-25 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive review of proton conductors, including theory, techniques, the materials themselves and applications.
Book Synopsis Infrared and Raman Spectroscopy of Lunar and Terrestrial Minerals by : Clarence Karr
Download or read book Infrared and Raman Spectroscopy of Lunar and Terrestrial Minerals written by Clarence Karr and published by Elsevier. This book was released on 2013-10-22 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared and Raman Spectroscopy of Lunar and Terrestrial Minerals makes available in a single reference work original descriptions and summaries of the research on infrared and Raman spectroscopy of lunar and terrestrial minerals so that this information will be readily available not only to those researchers in the continuing programs on lunar samples from the completed Apollo series and on the remote sensing of solar system objects, but, in particular, to that much larger group of researchers in government, industry, and universities involved in the many programs on terrestrial minerals and earth sciences by remote sensing. The chapters in this volume are arranged according to spectroscopic technique and/or frequency range rather than application. Thus there are chapters on visible and near-infrared, followed by those on mid-infrared, far-infrared, and Raman spectroscopy. Applications are roughly divided between lunar and terrestrial, although the broad range of interchangeability of applications is obvious in many instances. There are also chapters on remote sensing of space targets and earth sciences; on lunar mineralogy and terrestrial mineralogy and geology; and on structures of lunar minerals and structures of terrestrial minerals.
Book Synopsis Nanomagnetism and Spintronics by : Teruya Shinjo
Download or read book Nanomagnetism and Spintronics written by Teruya Shinjo and published by Elsevier. This book was released on 2013-10-07 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concise and accessible chapters of Nanomagnetism and Spintronics, Second Edition, cover the most recent research in areas of spin-current generation, spin-calorimetric effect, voltage effects on magnetic properties, spin-injection phenomena, giant magnetoresistance (GMR), and tunnel magnetoresistance (TMR). Spintronics is a cutting-edge area in the field of magnetism that studies the interplay of magnetism and transport phenomena, demonstrating how electrons not only have charge but also spin. This second edition provides the background to understand this novel physical phenomenon and focuses on the most recent developments and research relating to spintronics. This exciting new edition is an essential resource for graduate students, researchers, and professionals in industry who want to understand the concepts of spintronics, and keep up with recent research, all in one volume. Provides a concise, thorough evaluation of current research Surveys the important findings up to 2012 Examines the future of devices and the importance of spin current
Book Synopsis Metal Oxide Nanoparticles in Organic Solvents by : Markus Niederberger
Download or read book Metal Oxide Nanoparticles in Organic Solvents written by Markus Niederberger and published by Springer Science & Business Media. This book was released on 2009-09-17 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanoparticles in Organic Solvents discusses recent advances in the chemistry involved for the controlled synthesis and assembly of metal oxide nanoparticles, the characterizations required by such nanoobjects, and their size and shape depending properties. In the last few years, a valuable alternative to the well-known aqueous sol-gel processes was developed in the form of nonaqueous solution routes. Metal Oxide Nanoparticles in Organic Solvents reviews and compares surfactant- and solvent-controlled routes, as well as providing an overview of techniques for the characterization of metal oxide nanoparticles, crystallization pathways, the physical properties of metal oxide nanoparticles, their applications in diverse fields of technology, and their assembly into larger nano- and mesostructures. Researchers and postgraduates in the fields of nanomaterials and sol-gel chemistry will appreciate this book’s informative approach to chemical formation mechanisms in relation to metal oxides.
Book Synopsis Atom movements - Diffusion and mass transport in solids by : Jean-Marc Philibert
Download or read book Atom movements - Diffusion and mass transport in solids written by Jean-Marc Philibert and published by EDP Sciences. This book was released on 2012-12-03 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book is the result of diverse courses on diffusion. It is intended to give as complete an overview as possible of diffusion in solid media, while relating the process of diffusion to both their physical bases and their applications. A series of a real situations is covered in this account, from self-diffusion of radiotracers to the more complex cases of mass flow under chemical or thermal gradients or under electric fields, or diffusion in structures of lower dimensionality (surfaces and interfaces). In all these analyses, no category of materials was favored; metals, ionic crystals, oxydes, and semiconductors all had their turn. Only polymers were not specifically touched. One chapter is specifically devoted to techniques for studying diffusion, including methods of numerical simulation, and a last and long chapter gives a number of metallurgical phenomena in which diffusion plays a fundamental role.
Book Synopsis From Chemical Philosophy to Theoretical Chemistry by : Mary Jo Nye
Download or read book From Chemical Philosophy to Theoretical Chemistry written by Mary Jo Nye and published by Univ of California Press. This book was released on 1994-03-01 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: How did chemistry and physics acquire their separate identities, and are they on their way to losing them again? Mary Jo Nye has written a graceful account of the historical demarcation of chemistry from physics and subsequent reconvergences of the two, from Lavoisier and Dalton in the late eighteenth century to Robinson, Ingold, and Pauling in the mid-twentieth century. Using the notion of a disciplinary "identity" analogous to ethnic or national identity, Nye develops a theory of the nature of disciplinary structure and change. She discusses the distinctive character of chemical language and theories and the role of national styles and traditions in building a scientific discipline. Anyone interested in the history of scientific thought will enjoy pondering with her the question of whether chemists of the mid-twentieth century suspected chemical explanation had been reduced to physical laws, just as Newtonian mechanical philosophers had envisioned in the eighteenth century.
Book Synopsis Nanomaterials for Magnetic and Optical Hyperthermia Applications by : Raluca Maria Fratila
Download or read book Nanomaterials for Magnetic and Optical Hyperthermia Applications written by Raluca Maria Fratila and published by Elsevier. This book was released on 2018-11-30 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials for Magnetic and Optical Hyperthermia Applications focuses on the design, fabrication and characterization of nanomaterials (magnetic, gold and hybrid magnetic-gold nanoparticles) for in vitro and in vivo hyperthermia applications, both as standalone and adjuvant therapy in combination with chemotherapy. The book explores the potential for more effective cancer therapy solutions through the synergistic use of nanostructured materials as magnetic and optical hyperthermia agents and targeted drug delivery vehicles, while also discussing the challenges related to their toxicity, regulatory and translational aspects. In particular, the book focuses on the design, synthesis, biofunctionalization and characterization of nanomaterials employed for magnetic and optical hyperthermia. This book will be an important reference resource for scientists working in the areas of biomaterials and biomedicine seeking to learn about the potential of nanomaterials to provide hyperthermia solutions. Explores the design of efficient nanomaterials for hyperthermia applications, allowing readers to make informed materials selection decisions Discusses the biofunctionalization of a range of nanomaterials and their interaction with living systems Provides an overview of the current clinical applications of nanomaterials in hyperthermia treatment
Book Synopsis Electron Paramagnetic Resonance Spectroscopy by : Patrick Bertrand
Download or read book Electron Paramagnetic Resonance Spectroscopy written by Patrick Bertrand and published by Springer Nature. This book was released on 2020-02-03 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although originally invented and employed by physicists, electron paramagnetic resonance (EPR) spectroscopy has proven to be a very efficient technique for studying a wide range of phenomena in many fields, such as chemistry, biochemistry, geology, archaeology, medicine, biotechnology, and environmental sciences. Acknowledging that not all studies require the same level of understanding of this technique, this book thus provides a practical treatise clearly oriented toward applications, which should be useful to students and researchers of various levels and disciplines. In this book, the principles of continuous wave EPR spectroscopy are progressively, but rigorously, introduced, with emphasis on interpretation of the collected spectra. Each chapter is followed by a section highlighting important points for applications, together with exercises solved at the end of the book. A glossary defines the main terms used in the book, and particular topics, whose knowledge is not required for understanding the main text, are developed in appendices for more inquisitive readers.
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
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.
Book Synopsis Inorganic Chemical Biology by : Gilles Gasser
Download or read book Inorganic Chemical Biology written by Gilles Gasser and published by John Wiley & Sons. This book was released on 2014-06-23 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding, identifying and influencing the biological systems are the primary objectives of chemical biology. From this perspective, metal complexes have always been of great assistance to chemical biologists, for example, in structural identification and purification of essential biomolecules, for visualizing cellular organelles or to inhibit specific enzymes. This inorganic side of chemical biology, which continues to receive considerable attention, is referred to as inorganic chemical biology. Inorganic Chemical Biology: Principles, Techniques and Applications provides a comprehensive overview of the current and emerging role of metal complexes in chemical biology. Throughout all of the chapters there is a strong emphasis on fundamental theoretical chemistry and experiments that have been carried out in living cells or organisms. Outlooks for the future applications of metal complexes in chemical biology are also discussed. Topics covered include: • Metal complexes as tools for structural biology • IMAC, AAS, XRF and MS as detection techniques for metals in chemical biology • Cell and organism imaging and probing DNA using metal and metal carbonyl complexes • Detection of metal ions, anions and small molecules using metal complexes • Photo-release of metal ions in living cells • Metal complexes as enzyme inhibitors and catalysts in living cells Written by a team of international experts, Inorganic Chemical Biology: Principles, Techniques and Applications is a must-have for bioinorganic, bioorganometallic and medicinal chemists as well as chemical biologists working in both academia and industry.
Book Synopsis Sol-Gel Processing for Conventional and Alternative Energy by : Mario Aparicio
Download or read book Sol-Gel Processing for Conventional and Alternative Energy written by Mario Aparicio and published by Springer Science & Business Media. This book was released on 2012-02-04 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sol-Gel Processing for Conventional and Alternative Energy is a comprehensive source of information on the use of sol-gel processing in materials in energy systems, conversion, storage, and generation. The volume editors include numerous applications, primarily in nuclear fuel processing, electrolytes for fuel cells, and dye-sensitized solar cells (DSSC). In addition to examining contemporary processing, properties, and industrial applications, "Sol-Gel Processing for Conventional and Alternative Energy" identifies materials challenges presented by conventional and alternative energy generation that require new materials and innovative processing. Each chapter is written by an internationally respected researcher. The book provides a state-of-the-art treatment of different aspects of materials for energy production, with a focus on processing, and covers related topics such as carbon sequestration, clean energy, and biofuels.
Book Synopsis X-Ray and Neutron Reflectivity: Principles and Applications by : Jean Daillant
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.
Book Synopsis Jean-Baptiste Say and Political Economy by : Jean-Baptiste Say
Download or read book Jean-Baptiste Say and Political Economy written by Jean-Baptiste Say and published by Taylor & Francis. This book was released on 2016-11-10 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jean-Baptiste Say (1767–1832) was one of the first great economists to have laid down the foundations of economic science. Author of the famous Treatise on Political Economy in 1803, which was revised and re-edited on several occasions, he published numerous other works including a voluminous Complete Course in Practical Political Economy in 1828–9. He also taught political economy successively from 1815 until his death in three Parisian establishments: the Athénée, the Conservatory of Arts and Trades, and the Collège de France. The texts in which Say exposes his approach to political economy have not been available in the English language until now except for the fourth edition of the ‘Preliminary Discourse’ which serves as an introduction to the Treatise. This book presents a translation which renders his works accessible to the English speaking world. For the first time, English readers will be able to become directly immersed in Say’s principal texts, where he develops his conception of political economy. Jean-Baptiste Say and Political Economy proposes a translation of a selection of eleven of Say’s texts. The first three are versions of the ‘Preliminary Discourse’ from the Treatise’s editions of 1803, 1814 and 1826 with the variations of the editions of 1817, 1819 and 1841. The following four texts are the opening discourses pronounced at the Conservatory in 1820 and 1828 and the Collège de France in 1831 and 1832. The eighth text is the ‘General Considerations’ which open the Complete Course in Practical Political Economy of 1828, with the variations of the 1840 re-edition. The final three texts are those Say devotes to ‘the progress of political economy’ in what is akin to a history of economic thought. This volume is of great importance to economic historians and people studying Jean-Baptiste Say, as well as those who are interested in economic theory and philosophy and political economy.
Book Synopsis Contrast Agents for MRI by : Valérie C Pierre
Download or read book Contrast Agents for MRI written by Valérie C Pierre and published by Royal Society of Chemistry. This book was released on 2017-11-09 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a practical reference guide for designing and performing experiments, this book focuses on the five most common classes of contrast agents for MRI namely gadolinium complexes, chemical exchange saturation transfer agents, iron oxide nanoparticles, manganese complexes and fluorine contrast agents. It describes how to characterize and evaluate them and for each class, a description of the theory behind their mechanisms is discussed briefly to orient the new reader. Detailed subchapters discuss the different physical chemistry methods used to characterize them in terms of their efficacy, safety and in vivo behavior. Important consideration is also given to the different physical properties that affect the performance of the contrast agents. The editors and contributors are at the forefront of research in the field of MRI contrast agents and this unique, cutting edge book is a timely addition to the literature in this area.
