Characterization Of The Electronic Structure Of Silicon Nanoparticles Using X Ray Absorption And Emission
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Characterization Of The Electronic Structure Of Silicon Nanoparticles Using X Ray Absorption And Emission
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Author : April Susan Montoya Vaverka
language : en
Publisher:
Release Date : 2008
Characterization Of The Electronic Structure Of Silicon Nanoparticles Using X Ray Absorption And Emission written by April Susan Montoya Vaverka and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Characterization Of The Electronic Structure Of Silicon Nanoparticles Using X Ray Absorption And Emission
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Author :
language : en
Publisher:
Release Date : 2008
Characterization Of The Electronic Structure Of Silicon Nanoparticles Using X Ray Absorption And Emission written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Resolving open questions regarding transport in nanostructures can have a huge impact on a broad range of future technologies such as light harvesting for energy. Silicon has potential to be used in many of these applications. Understanding how the band edges of nanostructures move as a function of size, surface termination and assembly is of fundamental importance in understanding the transport properties of these materials. In this thesis work I have investigated the change in the electronic structure of silicon nanoparticle assemblies as the surface termination is changed. Nanoparticles are synthesized using a thermal evaporation technique and sizes are determined using atomic force microscopy (AFM). By passivating the particles with molecules containing alcohol groups we are able to modify the size dependent band edge shifts. Both the valence and conduction bands are measured using synchrotron based x-ray absorption spectroscopy (XAS) and soft x-ray fluorescence (SXF) techniques. Particles synthesized via recrystallization of amorphous silicon/SiO2 multilayers of thicknesses below 10 nm are also investigated using the synchrotron techniques. These samples also show quantum confinement effects but the electronic structure is different from those synthesized via evaporation methods. The total bandgap is determined for all samples measured. The origins of these differences in the electronic structures are discussed.
Silicon Nanomaterials Sourcebook
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Author : Klaus D. Sattler
language : en
Publisher: CRC Press
Release Date : 2017-07-28
Silicon Nanomaterials Sourcebook written by Klaus D. Sattler and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-07-28 with Science categories.
This comprehensive tutorial guide to silicon nanomaterials spans from fundamental properties, growth mechanisms, and processing of nanosilicon to electronic device, energy conversion and storage, biomedical, and environmental applications. It also presents core knowledge with basic mathematical equations, tables, and graphs in order to provide the reader with the tools necessary to understand the latest technology developments. From low-dimensional structures, quantum dots, and nanowires to hybrid materials, arrays, networks, and biomedical applications, this Sourcebook is a complete resource for anyone working with this materials: Covers fundamental concepts, properties, methods, and practical applications. Focuses on one important type of silicon nanomaterial in every chapter. Discusses formation, properties, and applications for each material. Written in a tutorial style with basic equations and fundamentals included in an extended introduction. Highlights materials that show exceptional properties as well as strong prospects for future applications. Klaus D. Sattler is professor physics at the University of Hawaii, Honolulu, having earned his PhD at the Swiss Federal Institute of Technology (ETH) in Zurich. He was honored with the Walter Schottky Prize from the German Physical Society, and is the editor of the sister work also published by Taylor & Francis, Carbon Nanomaterials Sourcebook, as well as the acclaimed multi-volume Handbook of Nanophysics.
Principles Of Materials Characterization And Metrology
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Author : Kannan M. Krishnan
language : en
Publisher: Oxford University Press
Release Date : 2021-05-07
Principles Of Materials Characterization And Metrology written by Kannan M. Krishnan and has been published by Oxford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-07 with Science categories.
Characterization enables a microscopic understanding of the fundamental properties of materials (Science) to predict their macroscopic behaviour (Engineering). With this focus, Principles of Materials Characterization and Metrology presents a comprehensive discussion of the principles of materials characterization and metrology. Characterization techniques are introduced through elementary concepts of bonding, electronic structure of molecules and solids, and the arrangement of atoms in crystals. Then, the range of electrons, photons, ions, neutrons and scanning probes, used in characterization, including their generation and related beam-solid interactions that determine or limit their use, is presented. This is followed by ion-scattering methods, optics, optical diffraction, microscopy, and ellipsometry. Generalization of Fraunhofer diffraction to scattering by a three-dimensional arrangement of atoms in crystals leads to X-ray, electron, and neutron diffraction methods, both from surfaces and the bulk. Discussion of transmission and analytical electron microscopy, including recent developments, is followed by chapters on scanning electron microscopy and scanning probe microscopies. The book concludes with elaborate tables to provide a convenient and easily accessible way of summarizing the key points, features, and inter-relatedness of the different spectroscopy, diffraction, and imaging techniques presented throughout. Principles of Materials Characterization and Metrology uniquely combines a discussion of the physical principles and practical application of these characterization techniques to explain and illustrate the fundamental properties of a wide range of materials in a tool-based approach. Based on forty years of teaching and research, this book incorporates worked examples, to test the reader's knowledge with extensive questions and exercises.
Synchrotron Radiation In Materials Science
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Author : Chunhai Fan
language : en
Publisher: John Wiley & Sons
Release Date : 2018-02-12
Synchrotron Radiation In Materials Science written by Chunhai Fan and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-12 with Technology & Engineering categories.
Endlich ein Fachbuch mit detaillierten Informationen zu einer der fortschrittlichsten Methoden zur Materialcharakterisierung. Ein herausragendes Team aus Herausgebern und Autoren von renommierten Einrichtungen und Institutionen beschäftigt sich mit Synchrotron-Verfahren, die sich in der Materialforschung bewährt haben. Nach einer Einführung in die Synchrotronstrahlung und ihrer Quellen werden die verschiedenen Techniken beschrieben, die von diesem besonders hellen Licht profitieren, u. a. Röntgenabsorption, Diffraktion, Streuung, Bildgebung und Lithographie. Zum Schluss folgt ein Überblick über die Anwendungen der Synchrotronstrahlung in den Materialwissenschaften. Dieses einzigartige, unabdingbare Referenzwerk für akademische Forscher und Forscher aus der Industrie verbindet Spezialisten aus der Synchrotronforschung und Materialwissenschaftler.
Nanocrystals
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Author : Sudheer Neralla
language : en
Publisher: BoD – Books on Demand
Release Date : 2012-08-29
Nanocrystals written by Sudheer Neralla and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-08-29 with Science categories.
Nanocrystals research has been an area of significant interest lately, due to the wide variety of potential applications in semiconductor, optical and biomedical fields. This book consists of a collection of research work on nanocrystals processing and characterization of their structural, optical, electronic, magnetic and mechanical properties. Various methods for nanocrystals synthesis are discussed in the book. Size-dependent properties such as quantum confinement, superparamagnetism have been observed in semiconductor and magnetic nanoparticles. Nanocrystals incorporated into different material systems have proven to possess improved properties. A review of the exciting outcomes nanoparticles study has provided indicates further accomplishments in the near future.
Nanodust In The Solar System Discoveries And Interpretations
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Author : Ingrid Mann
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-05-30
Nanodust In The Solar System Discoveries And Interpretations written by Ingrid Mann and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-30 with Science categories.
Nanodust and nanometer-sized structures are important components of many objects in space. Nanodust is observed in evolved stars, young stellar objects, protoplanetary disks, and dust debris disks. Within the solar system, nanodust is observed with in-situ experiments from spacecraft. Nanometer-sized substructures are found in the collected cometary and interplanetary dust particles and in meteorites. Understanding the growth and destruction of dust, its internal evolution, as well as the optical properties and the detection of nanoparticles is of fundamental importance for astrophysical research. This book provides a focused description of the current state of research and experimental results concerning nanodust in the solar system. It addresses three major questions: What is nanodust? How was it discovered in the solar system? And how do we interpret the observations? The book serves as a self-contained reference work for space researchers and provides solid information on nanodust in cosmic environments for researchers working in astrophysics or in other fields of physics.
Characterization Of Nanoparticles
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Author : Vasile-Dan Hodoroaba
language : en
Publisher: Elsevier
Release Date : 2019-09-24
Characterization Of Nanoparticles written by Vasile-Dan Hodoroaba and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-24 with Science categories.
Characterization of Nanoparticles: Measurement Processes for Nanoparticles surveys this fast growing field, including established methods for the physical and chemical characterization of nanoparticles. The book focuses on sample preparation issues (including potential pitfalls), with measurement procedures described in detail. In addition, the book explores data reduction, including the quantitative evaluation of the final result and its uncertainty of measurement. The results of published inter-laboratory comparisons are referred to, along with the availability of reference materials necessary for instrument calibration and method validation. The application of these methods are illustrated with practical examples on what is routine and what remains a challenge. In addition, this book summarizes promising methods still under development and analyzes the need for complementary methods to enhance the quality of nanoparticle characterization with solutions already in operation.
Nanosilicon
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Author : Anatoly A. Ischenko
language : en
Publisher: CRC Press
Release Date : 2014-07-23
Nanosilicon written by Anatoly A. Ischenko and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-23 with Science categories.
Nanosilicon: Properties, Synthesis, Applications, Methods of Analysis and Control examines the latest developments on the physics and chemistry of nanosilicon. The book focuses on methods for producing nanosilicon, its electronic and optical properties, research methods to characterize its spectral and structural properties, and its possible applic
Synchrotron Based Techniques In Soils And Sediments
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Author : Balwant Singh
language : en
Publisher: Elsevier Science
Release Date : 2010
Synchrotron Based Techniques In Soils And Sediments written by Balwant Singh and has been published by Elsevier Science this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Science categories.
Over the past 20 years, synchrotron-based research applications have provided important insight into the geochemical cycling of ions and the chemical and crystallographic properties of minerals in soils and sediments. Of particular significance is the understanding of local coordination environments with the use of X-ray absorption spectroscopy. The high flux and brightness of the X-ray beams have allowed researchers to work at environmentally relevant concentrations. The use of focusing mirrors and apertures which allow for mapping and trace particle surfaces, microbes, roots, channels and elements at the micron and at a nano-meter scale in 2 and 3D have also been a great enhancement to science. This book provides the most up-to-date information on synchrotron-based research applications in the field of soil, sediment and earth sciences. Invited authors provide chapters on a wide range of research topics including multiphase flow and transport processes (physical aspects), rhizosphere and microbial life (biological aspects), and dynamics of C, N, S, P and heavy metals and metalloids (chemical aspects). In addition, perspectives on the impact of synchrotron based applications, particularly X-ray absorption spectroscopy, and the role of synchrotron applications in remediation, regulatory, and decision making processes are considered. Up-to-date, with the latest research results and techniques in synchrotron-based techniques Information on specific techniques, elements and minerals, regulatory and remediation decision making, contaminants and the impact of X-ray absorption spectroscopy on soil science Internationally recognized leaders in their fields of expertise from Europe, North America, Asia and Australia