Elaboration De Fibres Optiques Nanostructurees Dopees Aux Ions De Terres Rares

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Élaboration de fibres optiques nanostructurées dopées aux ions de terres rares

Author : Valérie Mauroy
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (835 download)

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Book Synopsis Élaboration de fibres optiques nanostructurées dopées aux ions de terres rares by : Valérie Mauroy

Download or read book Élaboration de fibres optiques nanostructurées dopées aux ions de terres rares written by Valérie Mauroy and published by . This book was released on 2012 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les fibres optiques dopées aux ions erbium sont utilisées pour réaliser des amplificateurs. Dans un objectif de contrôler et de modifier les propriétés spectroscopiques de l’erbium dans ces fibres optiques à base de silice, nous étudions une voie originale consistant à encapsuler ces ions dans des nanoparticules d’oxyde obtenues in-situ directement au cours du procédé MCVD. La modification de l’environnement local de l’erbium permet de modifier les propriétés spectroscopiques. Ces nanoparticules apparaissent au cours de la fabrication grâce à l’incorporation d’un agent nucléant. Les cycles thermiques nécessaires à la fabrication de la préforme permettent alors de déclencher une séparation de phases spontanée. Cette thèse a pour but d’étudier l’influence des différents paramètres de fabrication (concentration en agent nucléant dans la solution de dopage, phases de consolidation ou de rétreint, etc.) sur les caractéristiques des nanoparticules et les propriétés spectroscopiques de l’erbium. L’étude des paramètres est regroupée dans ce manuscrit suivant deux axes : composition du matériau et cycles thermiques. Les nanoparticules ont été principalement caractérisées par Microscopie Electronique à Balayage (MEB). La spectroscopie de l’erbium a été analysée en réalisant des mesures de spectres d’émission et de temps de vie de la fluorescence à 1,5 μm. Des modifications spectroscopiques (élargissement de 40 à 60% de la largeur à mi-hauteur du spectre d’émission) ont été obtenues seulement pour les fibres présentant des diamètres moyens de particule élevés (50 nm). Les critères de transparence de pourront donc être satisfaits qu’en jouant sur la densité de particules.

Fibres optiques nanostructurées par voie sol-gel dans le système silice-zircone dopé terre rare

Author : Gurvan Brasse
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (8 download)

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Book Synopsis Fibres optiques nanostructurées par voie sol-gel dans le système silice-zircone dopé terre rare by : Gurvan Brasse

Download or read book Fibres optiques nanostructurées par voie sol-gel dans le système silice-zircone dopé terre rare written by Gurvan Brasse and published by . This book was released on 2009 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les nanomatériaux d'une part et les fibres optiques d'autre part sont au cœur de la révolution scientifique et technologique de ces dernières années. Cette thèse propose d'associer ces deux champs d'applications, afin d'élaborer un nouveau type de fibres optiques présentant un cœur solide nanostructuré par voie sol-gel dans le système silice-zircone dopé terre rare. En s'appuyant sur une étude rhéologique des sols de silice-zircone, ainsi que sur des analyses thermogravimétriques, thermodifférentielles et microstructurales des xérogels de silice-zircone, un protocole d'élaboration d'une telle fibre est mis en place. Les fibres ainsi élaborées sont alors caractérisées expérimentalement d'un point de vue microstructural (MEB, DRX) et d'un point de vue optique (transmission, profil d'indice, dispersion chromatique, pertes). Les propriétés de luminescence des différentes fibres non dopées et dopées avec des ions erbium et/ou ytterbium sont alors étudiées et les mécanismes qui en sont à l'origine sont discutés. L'ensemble de ce travail aboutit à la réalisation de fibres optiques présentant un cœur solide nanocomposite, possédant de bonnes propriétés de guidage et un faible niveau de pertes étant donné les applications visées. Des propriétés de luminescence originales ont finalement été mises en évidence au sein de ces fibres.

Elaboration de nanostructures cœur-couronne or-silice dopées par des ions lanthanides pour l’exaltation de la luminescence dans les fibres optiques de spécialité

Download Elaboration de nanostructures cœur-couronne or-silice dopées par des ions lanthanides pour l’exaltation de la luminescence dans les fibres optiques de spécialité PDF Online Free

Author : Laure Bertry
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (879 download)

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Book Synopsis Elaboration de nanostructures cœur-couronne or-silice dopées par des ions lanthanides pour l’exaltation de la luminescence dans les fibres optiques de spécialité by : Laure Bertry

Download or read book Elaboration de nanostructures cœur-couronne or-silice dopées par des ions lanthanides pour l’exaltation de la luminescence dans les fibres optiques de spécialité written by Laure Bertry and published by . This book was released on 2013 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse participe au projet ANR Fenoptic qui vise à exploiter les propriétés plasmoniques de nanoparticules métalliques incorporées dans des fibres optiques de spécialité. Actuellement, afin de limiter l’atténuation du signal à longue distance, celui-ci est ré-amplifié à intervalles réguliers par émission stimulée d’ions terres rares dispersés dans le cœur des fibres. L’objectif de ce travail de thèse est d’améliorer l’efficacité de l’amplification du signal en exaltant l’émission des ions luminescents grâce à un couplage efficace avec le cœur métallique. Des nanostructures multicouches originales consistant en une nanoparticule d’or enrobée de couronnes de silice pures ou dopées par des ions lanthanides ont été développées par chimie douce. La forme et la taille des cœurs d’or, ainsi que l’épaisseur et le taux de dopage des couronnes de diélectrique ont été finement contrôlés en solution, et des suspensions stables ont été obtenues. Des références optiques ont également été mises au point par dissolution du cœur métallique. Ces nanostructures sont insérées dans des matrices de silice sol-gel de qualité optique et caractérisées par spectroscopie d’émission et déclin de luminescence. Une forte extinction de la luminescence de l’europium (III) est observée à une distance de 2 nm de nanosphères d’or. Cette extinction diminue légèrement à mesure que la distance de couplage augmente, mais persiste jusqu’à 28 nm au moins. La possibilité d’incorporer ces nanostructures dans des cœurs silice de fibres optiques a été évaluée pour un procédé haute température détenu par Draka. Des essais préliminaires selon un procédé semi-industriel par voie sol-gel ont également été initiés.

FIBRES OPTIQUES DOPEES AUX TERRES RARES

Author : BERNARD.. DUSSARDIER
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis FIBRES OPTIQUES DOPEES AUX TERRES RARES by : BERNARD.. DUSSARDIER

Download or read book FIBRES OPTIQUES DOPEES AUX TERRES RARES written by BERNARD.. DUSSARDIER and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LES DISPOSITIFS A FIBRES OPTIQUES DOPEES AUX TERRES RARES (FODTR) VONT REVOLUTIONNER DE NOMBREUX DOMAINES TECHNIQUES TELS QUE TELECOMMUNICATIONS, METROLOGIE ET STOCKAGE DE DONNEES. LA CONCEPTION DE NOUVEAUX DISPOSITIFS NECESSITE LA COMPREHENSION DES PHENOMENES FONDAMENTAUX DANS LES FODTR ET LA MAITRISE DE LEUR FABRICATION. DANS CE BUT, CE MEMOIRE PRESENTE SUCCESSIVEMENT: 1) LA MISE EN UVRE DU DOPAGE AUX TERRES RARES DE PREFORMES POUR FIBRES OPTIQUES UNIMODALES, FABRIQUEES EN SILICE PAR MCVD (MODIFIED CHEMICAL VAPOR DEPOSITION), PAR DIFFUSION IONIQUE EN PHASE LIQUIDE, ET LA CARACTERISATION DES ETAPES DE FABRICATION; 2) L'ETUDE EXPERIMENTALE DE LA SPECTROSCOPIE ET DE L'AMPLIFICATION VERS 1,06 M DANS UNE FIBRE DOPEE AU NEODYME (FODND), PAR EXCITATION SELECTIVE DE PAQUETS SPECTRAUX D'IONS DOPANTS; 3) L'ETUDE DE L'AMPLIFICATION DE L'EMISSION SPONTANEE (OU SUPERFLUORESCENCE) VERS 1,06 M EN FONCTION DE LA TEMPERATURE ET DE LA LONGUEUR D'ONDE EXCITATRICE. CES ETUDES CONJOINTES PERMETTENT L'AMELIORATION DE NOS FODTR ET LA COMPREHENSION DES PHENOMENES DE SELECTION DE SITES DU NEODYME ET D'AMPLIFICATION SELECTIVE. EN CARACTERISANT SPECTROSCOPIQUEMENT UNE FODND PARTICULIERE, NOUS INTERPRETONS L'EVOLUTION SPECTRALE DE SA FLUORESCENCE EN ETUDIANT SON AFFINEMENT PAR EXCITATION SELECTIVE A BASSE TEMPERATURE, ET SOULIGNONS L'INFLUENCE DE LA FORTE INHOMOGENEITE DE LA DISTRIBUTION DES IONS DANS LA SILICE VITREUSE. CETTE INHOMOGENEITE PROVOQUE L'ALTERATION DU GAIN LORSQU'ON MODIFIE LES CONDITIONS D'EXCITATION, PARTICULIEREMENT LA LONGUEUR D'ONDE EXCITATRICE. NOUS ETABLISSONS L'INTERDEPENDANCE DES CARACTERISTIQUES SPECTRALES ET D'EFFICACITE D'UNE FIBRE SUPERFLUORESCENTE. EN MODELISANT LEUR COMPORTEMENT, NOUS MONTRONS QUE LA PREVISION DES CARACTERISTIQUES DE LA SUPERFLUORESCENCE EST PERMISE LORSQUE LE SPECTRE DU GAIN EST HOMOGENE, ET QUE SON EFFICACITE PEUT ETRE FORTEMENT DIMINUEE PAR L'EXISTENCE D'UNE AUTRE TRANSITION AMPLIFIEE, VERS 0,9 M. LES RESULTATS ET TECHNIQUES EXPERIMENTALES PRESENTES PERMETTENT LA CONCEPTION DE SOURCES LUMINEUSES OU D'AMPLIFICATEURS A FODTR EN TENANT COMPTE SIMULTANEMENT DES CARACTERISTIQUES DU MILIEU AMPLIFICATEUR ET DES CONDITIONS D'UTILISATION

The Role of Topology in Materials

Author : Sanju Gupta
Publisher :
ISBN 13 : 9783319765976
Total Pages : 297 pages
Book Rating : 4.7/5 (659 download)

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Book Synopsis The Role of Topology in Materials by : Sanju Gupta

Download or read book The Role of Topology in Materials written by Sanju Gupta and published by . This book was released on 2018 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most important advances in the class of topological materials and discusses the topological characterization, modeling and metrology of materials. Further, it addresses currently emerging characterization techniques such as optical and acoustic, vibrational spectroscopy (Brillouin, infrared, Raman), electronic, magnetic, fluorescence correlation imaging, laser lithography, small angle X-ray and neutron scattering and other techniques, including site-selective nanoprobes. The book analyzes the topological aspects to identify and quantify these effects in terms of topology metrics. The topological materials are ubiquitous and range from (i) de novo nanoscale allotropes of carbons in various forms such as nanotubes, nanorings, nanohorns, nanowalls, peapods, graphene, etc. to (ii) metallo-organic frameworks, (iii) helical gold nanotubes, (iv) Möbius conjugated polymers, (v) block co-polymers, (vi) supramolecular assemblies, to (vii) a variety of biological and soft-matter systems, e.g. foams and cellular materials, vesicles of different shapes and genera, biomimetic membranes, and filaments, (viii) topological insulators and topological superconductors, (ix) a variety of Dirac materials including Dirac and Weyl semimetals, as well as (x) knots and network structures. Topological databases and algorithms to model such materials have been also established in this book. In order to understand and properly characterize these important emergent materials, it is necessary to go far beyond the traditional paradigm of microscopic structure-property-function relationships to a paradigm that explicitly incorporates topological aspects from the outset to characterize and/or predict the physical properties and currently untapped functionalities of these advanced materials. Simulation and modeling tools including quantum chemistry, molecular dynamics, 3D visualization and tomography are also indispensable. These concepts have found applications in condensed matter physics, materials science and engineering, physical chemistry and biophysics, and the various topics covered in the book have potential applications in connection with novel synthesis techniques, sensing and catalysis. As such, the book offers a unique resource for graduate students and researchers alike.

Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications

Author : Ru-Shi Liu
Publisher : Springer
ISBN 13 : 9811015902
Total Pages : 522 pages
Book Rating : 4.8/5 (11 download)

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Book Synopsis Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications by : Ru-Shi Liu

Download or read book Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications written by Ru-Shi Liu and published by Springer. This book was released on 2016-09-01 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces readers to fundamental information on phosphor and quantum dots. It comprehensively reviews the latest research advances in and applications of fluoride phosphors, oxide phosphors, nitridosilicate phosphors and various quantum dot materials. Phosphors and phosphor-based quantum dot materials have recently gained considerable scientific interest due to their wide range of applications in lighting, displays, medical and telecommunication technologies. This work will be of great interest to researchers and graduate students in materials sciences and chemistry who wish to learn more about the principles, synthesis and analysis of phosphors and quantum dot materials.

Transdisciplinarity: Joint Problem Solving among Science, Technology, and Society

Author : J. Thompson Klein
Publisher : Birkhäuser
ISBN 13 : 3034884192
Total Pages : 333 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Transdisciplinarity: Joint Problem Solving among Science, Technology, and Society by : J. Thompson Klein

Download or read book Transdisciplinarity: Joint Problem Solving among Science, Technology, and Society written by J. Thompson Klein and published by Birkhäuser. This book was released on 2012-12-06 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: What kind of science do we need today and tomorrow? In a game that knows no boundaries, a game that contaminates science, democracy and the market economy, how can we distinguish true needs from simple of fashion? How can we distinguish between necessity and fancy? whims How can we differentiate conviction from opinion? What is the meaning of this all? Where is the civilizing project? Where is the universal outlook of the minds that might be capable of counteracting the global reach of the market? Where is the common ground that links each of us to the other? We need the kind of science that can live up to this need for univer sality, the kind of science that can answer these questions. We need a new kind of knowledge, a new awareness that can bring about the creative destruction of certainties. Old ideas, dogmas, and out-dated paradigms must be destroyed in order to build new knowledge of a type that is more socially robust, more scientifically reliable, stable and above all better able to express our needs, values and dreams. What is more, this new kind of knowledge, which will be challenged in turn by ideas yet to come, will prove its true worth by demonstrating its capacity to dialogue with these ideas and grow with them.

ICREEC 2019

Author : Ahmed Belasri
Publisher : Springer Nature
ISBN 13 : 9811554447
Total Pages : 659 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis ICREEC 2019 by : Ahmed Belasri

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.

Photobiology

Author : Lars Olof Björn
Publisher : Springer Science & Business Media
ISBN 13 : 9401005818
Total Pages : 452 pages
Book Rating : 4.4/5 (1 download)

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Book Synopsis Photobiology by : Lars Olof Björn

Download or read book Photobiology written by Lars Olof Björn and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photobiology - the science of light and life - begins with basic principles and the physics of light and continues with general photobiological research methods, such as generation of light, measurement of light, and action spectroscopy. In an interdisciplinary way, it then treats how organisms tune their pigments and structures to the wavelength components of light, and how light is registered by organisms. Then follow various examples of photobiological phenomena: the design of the compound eye in relation to the properties of light, phototoxicity, photobiology of the human skin and of vitamin D, photomorphogenesis, photoperiodism, the setting of the biological clock by light, and bioluminescence. A final chapter is devoted to teaching experiments and demonstrations in photobiology. This book encompasses topics from a diverse array of traditional disciplines: physics, biochemistry, medicine, zoology, botany, microbiology, etc., and makes different aspects of photobiology accessible to experts in all these areas as well as to the novice.

Biogenic Nano-Particles and their Use in Agro-ecosystems

Author : Mansour Ghorbanpour
Publisher : Springer Nature
ISBN 13 : 981152985X
Total Pages : 610 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Biogenic Nano-Particles and their Use in Agro-ecosystems by : Mansour Ghorbanpour

Download or read book Biogenic Nano-Particles and their Use in Agro-ecosystems written by Mansour Ghorbanpour and published by Springer Nature. This book was released on 2020-03-20 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several nano-scale devices have emerged that are capable of analysing plant diseases, nutrient deficiencies and any other ailments that may affect food security in agro-ecosystems. It has been envisioned that smart delivery systems can be developed and utilised for better management of agricultural ecosystems. These systems could exhibit beneficial, multi-functional characteristics, which could be used to assess and also control habitat-imposed stresses to crops. Nanoparticle-mediated smart delivery systems can control the delivery of nutrients or bioactive and/or pesticide molecules in plants. It has been suggested that nano-particles in plants might help determine their nutrient status and could also be used as cures in agro-ecosystems. Further, to enhance soil and crop productivity, nanotechnology has been used to create and deliver nano fertilizers, which can be defined as nano-particles that directly help supply nutrients for plant growth and soil productivity. Nano-particles can be absorbed onto clay networks, leading to improved soil health and more efficient nutrient use by crops. Additionally, fertilizer particles can be coated with nano-particles that facilitate slow and steady release of nutrients, reducing loss of nutrients and enhancing their efficiency in agri-crops. Although the use of nanotechnology in agro-ecosystems is still in its early stages and needs to be developed further, nano-particle-mediated delivery systems are promising solutions for the successful management of agri-ecosystems. In this context, the book offers insights into nanotechnology in agro-ecosystems with reference to biogenic nanoparticles. It highlights the: • occurrence and diversity of Biogenic Nanoparticles • mechanistic approach involved in the synthesis of biogenic nanoparticles • synthesis of nanoparticles using photo-activation, and their fate in the soil ecosystem • potential applications of nanoparticles in agricultural systems • application and biogenic synthesis of gold nanoparticles and their characterization • impact of biogenic nanoparticles on biotic stress to plants • mechanistic approaches involved in the antimicrobial effects and cytotoxicity of biogenic nanoparticles • role of biogenic nanoparticles in plant diseases management • relevance of biological synthesized nanoparticles in the longevity of agricultural crops • design and synthesis of nano-biosensors for monitoring pollutants in water, soil and plant systems • applications of nanotechnology in agriculture with special refer to soil, water and plant sciences A useful resource for postgraduate and research students in the field of plant and agricultural sciences, it is also of interest to researchers working in nano and biotechnology.

Metallomesogens

Author : Jose Luis Serrano
Publisher : John Wiley & Sons
ISBN 13 : 3527615083
Total Pages : 517 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Metallomesogens by : Jose Luis Serrano

Download or read book Metallomesogens written by Jose Luis Serrano and published by John Wiley & Sons. This book was released on 2008-09-26 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on metal-containing liquid crystals is a rapidly expanding, multidisciplinary field with new materials continually being synthesized and novel applications being developed. 'Metallomesogens' is the first comprehensive survey of the field, introducing the reader to: * materials design * synthesis * physical properties * emerging applications Carefully selected references round off this well-organized compendium. It is an indispensable guide to experienced researchers in coordination and organometallic chemistry as well as in liquid-crystal and materials science. Newcomers and graduate students will also benefit from this didactically sound introduction to the field.

Semiconductor Materials for Solar Photovoltaic Cells

Author : M. Parans Paranthaman
Publisher : Springer
ISBN 13 : 3319203312
Total Pages : 290 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Semiconductor Materials for Solar Photovoltaic Cells by : M. Parans Paranthaman

Download or read book Semiconductor Materials for Solar Photovoltaic Cells written by M. Parans Paranthaman and published by Springer. This book was released on 2015-09-16 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the current status of semiconductor materials for conversion of sunlight to electricity, and highlights advances in both basic science and manufacturing. Photovoltaic (PV) solar electric technology will be a significant contributor to world energy supplies when reliable, efficient PV power products are manufactured in large volumes at low cost. Expert chapters cover the full range of semiconductor materials for solar-to-electricity conversion, from crystalline silicon and amorphous silicon to cadmium telluride, copper indium gallium sulfide selenides, dye sensitized solar cells, organic solar cells, and environmentally friendly copper zinc tin sulfide selenides. The latest methods for synthesis and characterization of solar cell materials are described, together with techniques for measuring solar cell efficiency. Semiconductor Materials for Solar Photovoltaic Cells presents the current state of the art as well as key details about future strategies to increase the efficiency and reduce costs, with particular focus on how to reduce the gap between laboratory scale efficiency and commercial module efficiency. This book will aid materials scientists and engineers in identifying research priorities to fulfill energy needs, and will also enable researchers to understand novel semiconductor materials that are emerging in the solar market. This integrated approach also gives science and engineering students a sense of the excitement and relevance of materials science in the development of novel semiconductor materials. · Provides a comprehensive introduction to solar PV cell materials · Reviews current and future status of solar cells with respect to cost and efficiency · Covers the full range of solar cell materials, from silicon and thin films to dye sensitized and organic solar cells · Offers an in-depth account of the semiconductor material strategies and directions for further research · Features detailed tables on the world leaders in efficiency demonstrations · Edited by scientists with experience in both research and industry

Chitin

Author : Neal S. Gupta
Publisher : Springer Science & Business Media
ISBN 13 : 9048196841
Total Pages : 183 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Chitin by : Neal S. Gupta

Download or read book Chitin written by Neal S. Gupta and published by Springer Science & Business Media. This book was released on 2010-11-30 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are several books on properties of chitin and associated biomolecules and their biochemical significance. However, the present volume deals with a wide variety of biogeochemical and organic geochemical aspects of this vital macromolecule written by leading authors and experts in the field. Each chapter is carefully peer reviewed and is an updated account of recent research in isotopic, nanostructural, biochemical, microstructural, geochemical, paleontological and experimental aspects of chitin formation, distribution and preservation in the environment and earth history.

The Mie Theory

Author : Wolfram Hergert
Publisher : Springer
ISBN 13 : 3642287387
Total Pages : 268 pages
Book Rating : 4.6/5 (422 download)

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Book Synopsis The Mie Theory by : Wolfram Hergert

Download or read book The Mie Theory written by Wolfram Hergert and published by Springer. This book was released on 2012-06-30 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents in a concise way the Mie theory and its current applications. It begins with an overview of current theories, computational methods, experimental techniques, and applications of optics of small particles. There is also some biographic information on Gustav Mie, who published his famous paper on the colour of Gold colloids in 1908. The Mie solution for the light scattering of small spherical particles set the basis for more advanced scattering theories and today there are many methods to calculate light scattering and absorption for practically any shape and composition of particles. The optics of small particles is of interest in industrial, atmospheric, astronomic and other research. The book covers the latest developments in divers fields in scattering theory such as plasmon resonance, multiple scattering and optical force.

Nanobiotechnology Applications in Plant Protection

Author : Kamel A. Abd-Elsalam
Publisher : Springer Nature
ISBN 13 : 303013296X
Total Pages : 291 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Nanobiotechnology Applications in Plant Protection by : Kamel A. Abd-Elsalam

Download or read book Nanobiotechnology Applications in Plant Protection written by Kamel A. Abd-Elsalam and published by Springer Nature. This book was released on 2019-10-04 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanobiotechnology Applications in Plant Protection: Volume 2 continues the important and timely discussion of nanotechnology applications in plant protection and pathology, filling a gap in the literature for nano applications in crop protection. Nanobiopesticides and nanobioformulations are examined in detail and presented as powerful alternatives for eco-friendly management of plant pathogens and nematodes. Leading scholars discuss the applications of nanobiomaterials as antimicrobials, plant growth enhancers and plant nutrition management, as well as nanodiagnostic tools in phytopathology and magnetic and supramagnetic nanostructure applications for plant protection. This second volume includes exciting new content on the roles of biologically synthesized nanoparticles in seed germination and zinc-based nanostructures in protecting against toxigenic fungi. Also included is new research in phytotoxicity, nano-scale fertilizers and nanomaterial applications in nematology and discussions on Botyris grey mold and nanobiocontrol. This book also explores the potential effects on the environment, ecosystems and consumers and addresses the implications of intellectual property for nanobiopesticides. Further discussed are nanotoxicity effects on the plant ecosystem and nano-applications for the detection, degradation and removal of pesticides.

Molecular Beam Epitaxy

Author : John Wilfred Orton
Publisher :
ISBN 13 : 0199695822
Total Pages : 529 pages
Book Rating : 4.1/5 (996 download)

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Book Synopsis Molecular Beam Epitaxy by : John Wilfred Orton

Download or read book Molecular Beam Epitaxy written by John Wilfred Orton and published by . This book was released on 2015 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is a history of Molecular Beam Epitaxy (MBE) as applied to the growth of semiconductor thin films (note that it does not cover the subject of metal thin films). It begins by examining the origins of MBE, first of all looking at the nature of molecular beams and considering their application to fundamental physics, to the development of nuclear magnetic resonance and to the invention of the microwave MASER. It shows how molecular beams of silane (SiH4) were used to study the nucleation of silicon films on a silicon substrate and how such studies were extended to compound semiconductors such as GaAs. From such surface studies in ultra-high vacuum the technique developed into a method of growing high quality single crystal films of a wide range of semiconductors. Comparing this with earlier evaporation methods of deposition and with other epitaxial deposition methods such as liquid phase and vapour phase epitaxy (LPE and VPE). The text describes the development of MBE machines from the early 'home-made' variety to that of commercial equipment and show how MBE was gradually refined to produce high quality films with atomic dimensions. This was much aided by the use of various in-situ surface analysis techniques, such as reflection high energy electron diffraction (RHEED) and mass spectrometry, a feature unique to MBE. It looks at various modified versions of the basic MBE process, then proceed to describe their application to the growth of so-called 'low-dimensional structures' (LDS) based on ultra-thin heterostructure films with thickness of order a few molecular monolayers. Further chapters cover the growth of a wide range of different compounds and describe their application to fundamental physics and to the fabrication of electronic and opto-electronic devices. The authors study the historical development of all these aspects and emphasise both the (often unexpected) manner of their discovery and development and the unique features which MBE brings to the growth of extremely complex structures with monolayer accuracy.

Biotechnology of Biopolymers

Author : Magdy Elnashar
Publisher : BoD – Books on Demand
ISBN 13 : 9533071796
Total Pages : 380 pages
Book Rating : 4.5/5 (33 download)

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Book Synopsis Biotechnology of Biopolymers by : Magdy Elnashar

Download or read book Biotechnology of Biopolymers written by Magdy Elnashar and published by BoD – Books on Demand. This book was released on 2011-07-05 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book Biotechnology of Biopolymers omprises 17 chapters covering occurrence, synthesis, isolation and production, properties and applications, biodegradation and modification, the relevant analysis methods to reveal the structures and properties of biopolymers and a special section on the theoretical, experimental and mathematical models of biopolymers. This book will hopefully be supportive to many scientists, physicians, pharmaceutics, engineers and other experts in a wide variety of different disciplines, in academia and in industry. It may not only support research and development but may be also suitable for teaching. Publishing of this book was achieved by choosing authors of the individual chapters for their recognized expertise and for their excellent contributions to the various fields of research.