Описание: The thesis presents experimental and theoretical results about the surface dynamics and the surface Dirac fermion (DF) spectral function of the strong topological insulators Bi2Te3 and Bi2Se3. The experimental results reveal the presence of a strong Kohn anomaly in the measured surface phonon dispersion of a low-lying optical mode, and the absence of surface Rayleigh acoustic phonons. Fitting the experimental data to theoretical models employing phonon Matsubara functions allowed the extraction of the matrix elements of the coupling Hamiltonian and the modifications to the surface phonon propagator that are encoded in the phonon self-energy. This allowed, for the first time, calculation of phonon mode-specific DF coupling ??(q) from experimental data, with average coupling significantly higher than typical values for metals, underscoring the strong coupling between optical surface phonons and surface DFs in topological insulators. Finally, to connect to experimental results obtained from photoemission spectroscopies, an electronic (DF) Matsubara function was constructed using the determined electron-phonon matrix elements and the optical phonon dispersion. This allowed calculation of the DF spectral function and density of states, allowing for comparison with photoemission and scanning tunneling spectroscopies. The results set the necessary energy resolution and extraction methodology for calculating ? from the DF perspective.
Автор: Wang, Zhi Yuan Название: Near-Infrared Organic Materials and Emerging Applications ISBN: 0367380072 ISBN-13(EAN): 9780367380076 Издательство: Taylor&Francis Рейтинг: Цена: 9798.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
To physicists and chemists, color means light--emission, absorption, spectrum, and coloration. Near-Infrared Organic Materials and Emerging Applications presents knowledge and applications of invisible colored organic materials. Near-infrared (NIR) materials are defined as substances that interact with NIR light, namely, absorption and reflection, and emit NIR light upon stimulation, for example, photoexcitation, electric field, and chemical reaction. This book offers up-to-date information on low band-gap organic materials with unique near-infrared absorbing, fluorescent, and photovoltaic properties for various emerging applications.
The author emphasizes the chemistry of materials, in particular the structure-property relationship of near-infrared organic compounds and polymers. The text discusses the molecular design aspect of NIR materials, including effects of conjugation length and donor-acceptor charge transfer. Chapters also cover information on the structures and key properties of NIR organic compounds, such as those containing rylene, polymethine, and metal-complex chromophores, as well as polymers, including nonconjugated NIR-absorbing, conjugated dye-containing, and donor-acceptor conjugated polymers. The final chapter describes emerging applications of NIR organic materials based on absorbing, chromogenic, photosensitizing, photovoltaic, and fluorescent properties, as well as applications of low band-gap compounds and polymers in ambipolar organic transistors. Presenting useful data and thought-provoking ideas, this book provides a practical reference on optical properties and structures of NIR organic materials and their design principles and applications.
Описание: The thesis presents experimental and theoretical results about the surface dynamics and the surface Dirac fermion (DF) spectral function of the strong topological insulators Bi2Te3 and Bi2Se3.
Описание: Biochar and its implementation as a renewable-based material is one of the topics on which the research community has focused the greatest energy in the last twenty years. This book provides readers with a scientific and technological overview of biochar, including new technologies for biochar production, new environmental and agronomic applications (e.g. biochar as growing media component or biochar application for mine land reclamation) and some emerging biochar applications in different fields (e.g.
energy storage and catalysis). A special emphasis is placed on analyzing the links between the different stages of the value chain, underpinning the economic viability of biochar systems.Biochar as a Renewable-Based Material: With Applications in Agriculture, the Environment and Energy is designed as a textbook for graduate and postgraduate courses as well as a handbook for early-stage scientists, policy makers and potential technology customers. The book is written by internationally recognized scientists with a variety of complementary backgrounds.
Название: Diatom Nanotechnology: Progress and Emerging Applications ISBN: 1782629327 ISBN-13(EAN): 9781782629320 Издательство: Royal Society of Chemistry Рейтинг: Цена: 33581.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: A comprehensive overview of the unique porous silica structure of diatoms, their mechanism of formation, properties and applications.
Описание: This book aims at identifying novel advanced materials of extreme wetting properties (MEWP) for practical, industrial applications. This book also discusses a large variety of other potential applications of MEWP, thus providing new ideas to scientists and engineers for further exploitation of these novel materials.
Описание: This book aims at identifying novel advanced materials of extreme wetting properties (MEWP) for practical, industrial applications. This book also discusses a large variety of other potential applications of MEWP, thus providing new ideas to scientists and engineers for further exploitation of these novel materials.
Описание: Nickel-Titanium Smart Hybrid Materials: From Micro- to Nano-structured Alloys for Emerging Applications describes advanced properties that can be adapted in NiTi-alloys. Nickel-Titanium (NiTi) systems are receiving wide demand in growing industries due to their smart, high-temperature or biocompatible behavior. These influenced behaviors are carefully described in the micro-scale and nanoscale range, with NiTi smart materials described on the basis of their shape memory effect (SME) and super-elastic (SE) properties for sensor and actuator application. This book discusses novel properties of nickel-titanium systems, helping materials scientists and engineers produce smart technologies and systems for the aeronautical, automobile, mechanical, healthcare and electronics industries.
Описание: Nanocomposite materials are multiphase materials where the interactions between the different components are enhanced by their intimate contact. Indeed, this emerging class of innovative materials guarantees excellent macroscopic properties by taking advantage of the peculiar characteristics that nanometer-sized fillers give to a suitable matrix compared to those obtainable with the same fillers at micrometric dimensions. These innovative materials improve and extend the range of desirable properties.
Diverse Applications of Organic-Inorganic Nanocomposites: Emerging Research and Opportunities is a pivotal reference source that provides vital research on the application of organic-inorganic nanocomposite materials within various professional disciplines and in different human activities. While highlighting topics such as photocatalysis, atomistic modeling, and membrane separation, this publication explores the strengths and weaknesses of nanocomposites as well as future concepts and devices. This book is ideally designed for chemists, biologists, engineers, researchers, government professionals, academicians, and postgraduate students.
Описание: Nanocomposite materials are multiphase materials where the interactions between the different components are enhanced by their intimate contact. Indeed, this emerging class of innovative materials guarantees excellent macroscopic properties by taking advantage of the peculiar characteristics that nanometer-sized fillers give to a suitable matrix compared to those obtainable with the same fillers at micrometric dimensions. These innovative materials improve and extend the range of desirable properties. Diverse Applications of Organic-Inorganic Nanocomposites: Emerging Research and Opportunities is a pivotal reference source that provides vital research on the application of organic-inorganic nanocomposite materials within various professional disciplines and in different human activities. While highlighting topics such as photocatalysis, atomistic modeling, and membrane separation, this publication explores the strengths and weaknesses of nanocomposites as well as future concepts and devices. This book is ideally designed for chemists, biologists, engineers, researchers, government professionals, academicians, and postgraduate students.
Low-Grade Thermal Energy Harvesting: Advances in Thermoelectrics, Materials, and Emerging Applications provides readers with fundamental and key concepts surrounding low-grade thermal energy conversion while also reviewing the latest research directions. The book covers the most promising and emerging technologies for low-grade heat recovery, harvesting and conversion, including wearable thermoelectrics and organic thermoelectrics. Each chapter includes key materials, principles, design and fabrication strategies for low-grade heat recovery. Special attention on emerging materials such as organic composites, 2D materials and nanomaterials are also included. The book emphasizes materials and device structures that enable the powering of wearable electronics and consumer electronics.
The book is suitable for materials scientists and engineers in academia and R&D in manufacturing, industry, energy and electronics.
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