Elektronisk udstyr og materialer

What are the physical mechanisms that underlie the efficient generation and transfer of energy at the nanoscale? Nature seems to know the answer to this question, having optimised the process of photosynthesis in plants over millions of years of evolution. It is conceivable that humans could mimic this process using synthetic materials, and organic semiconductors have attracted a lot of attention in this respect.Once an organic semiconductor absorbs light, bound pairs of electrons with positively charged holes, termed `excitons¿, are formed. Excitons behave as fundamental energy carriers, hence understanding the physics behind their efficient generation and transfer is critical to realising the potential of organic semiconductors for light-harvesting and other applications, such as LEDs and transistors. However, this problem is extremely challenging since excitons can interact very strongly with photons. Moreover, simultaneously with the exciton motion, organic molecules canvibrate in hundreds of possible ways, having a very strong effect on energy transfer.The description of these complex phenomena is often beyond the reach of standard quantum mechanical methods which rely on the assumption of weak interactions between excitons, photons and vibrations. In this thesis, Antonios Alvertis addresses this problem through the development and application of a variety of different theoretical methods to the description of these strong interactions, providing pedagogical explanations of the underlying physics. A comprehensive introduction to organic semiconductors is followed by a review of the background theory that is employed to approach the relevant research questions, and the theoretical results are presented in close connection with experiment, yielding valuable insights for experimentalists and theoreticians alike.

Bionanocatalysis: From Design to Applications discusses recent advances in nano-biocatalysis, fundamental design concepts and their applications in a variety of industry sectors. Strategies for immobilizing enzymes onto nanocarriers, made from polymers, silicas, carbons, and metals, by physical adsorption, covalent binding, cross-linking, or specific ligand spacers are also discussed as are the advantages, problems and solutions derived from the use of non-porous nanomaterials for enzyme immobilization. This is an important reference source for materials scientists and chemical engineers who would like to learn more about how nanobiocatalysts are designed and used. Biocatalysis has emerged as a sustainable technique to synthesize valuable commodity chemicals with wide applications in various industrial domains, such as in agriculture, cosmetics, pharmaceuticals, biofuels, biosensors, biofuel cells, biochemicals, and foods. The synergistic integration of bio-catalysis engineering with nanostructured materials, as unique multifunctional carrier matrices, has emerged as a new interface of nano-biocatalysis (NBC).

Nanomaterials from Renewable Resources for Emerging Applications details developments in nanomaterials produced from renewable materials and their usage in food and packaging, energy conservation, and environmental applications.¿ Introduces fundamentals of nanomaterials from renewable resources, including processing and characterization.¿ Covers nanomaterials for applications in food and packaging, including nanocellulose, lignin- and chitosan-based nanomaterials, and nanostarch.¿ Discusses applications in energy conservation, such as supercapacitors, electrolyte membranes, energy storage devices, and insulation.¿ Describes environmental uses such as water remediation and purification and oil spill clean-ups.¿ Highlights advantages and challenges in commercialization of green nanoparticle-based materials.Equally beneficial to researchers and professionals, this book is aimed at readers across materials science and engineering, chemical engineering, chemistry, and related fields interested in sustainable engineering.

This comprehensive book covers the design of function circuits with the help of 555 timer integrated circuits in a single volume. It further discusses how derived function circuits are implemented with integrator, comparator, low pass filter, peak detector, and sample and hold circuits.

The primary goal of this book is to promote research and developmental activities in measurement, disaster prevention and mitigation; and another goal is to promote scientific information interchange between scholars from the top universities, business associations, research centers and high-tech enterprises working all around the world.

This thesis provides the first atomic length-scale observation of the structural transformation (referred to as lattice reconstruction) that occurs in moire superlattices of twisted bilayer transition metal dichalcogenides (TMDs) at low (I < 2Es) twist angles. Such information is essential for the fundamental understanding of how manipulating the rotational twist-angle between two adjacent 2-dimensional crystals subsequently affects their optical and electrical properties.Studies using Scanning transmission electron microscopy (STEM), a powerful tool for atomic-scale imaging, were limited due to the complexity of the (atomically-thin) sample fabrication requirements. This work developed a unique way to selectively cut and re-stack monolayers of TMDs with a controlled rotational twist angle which could then be easily suspended on a TEM grid to meet the needs of the atomically thin sample requirements. The fabrication technique enabled the study of the two common stacking-polytypes including 3R and 2H (using MoS2 and WS2 as the example) as well as their structural evolution with decreasing twist-angle.Atomic-scale studies were followed by a comprehensive investigation of their electronic properties using scanning probe microscopy and electrical transport measurements of the artificially-engineered structures. The electronic structure of two common stacking-polytypes (3R and 2H) were strikingly different, as revealed by conductive atomic force microscopy. Further studies focused on the 3R-stacking polytype to reveal room-temperature out-of-plane ferroelectricity using tools such as kelvin probe force microscopy, scanning electron microscopy and electrical transport measurements. This work highlights that the unique intrinsic properties of TMDs (i.e. semiconductors with strongly light-matter interaction) combined with the additional twisted degree-of-freedom has great potential to create atomically thin transistors/LEDs with built-in memory storage functions and will further aid in the development of the next generation of optoelectronics.

"This book is for readers who have mastered the basics of Arduino programming and want to take their skills to the next level. There are 70 projects with step-by-step instructions to teach new techniques and topics related to the Arduino microcontroller platform"--

Additive manufacturing classification is one of the biggest issues faced by AM community. The book provides a comprehensive classification of AM, which can be useful to anyone working in any area of manufacturing. As the classification depends on the interrelation of various AM processes, the book provides concise and critical information of those processes, which can be helpful to anyone looking for a concise book on AM. The book provides original information unavailable in research papers.

This book shows the steps from data sheets of sensors to the extraction of model parameters for the program PSPICE in order to realize circuit analyses. Physical ENTITIES as temperature, humidity, light, pressure and sound are included by equations. The simulation concerns temperature displays, characteristics of humidity-sensors, light-to-voltage Converters, strain gauges, reed relays and Piezol-electric-sounders US-Converters and SAW Components

This book comprises a detailed overview on the role of photocatalysts for environmental remediation, hydrogen production and carbon dioxide reduction. Effective ways to enhance the photocatalytic activity of the material via doping, hybrid material, laser light and nanocomposites have been discussed in this book. The book also further elaborates the role of metal nanoparticles, rare earth doping, sensitizers, surface oxygen vacancy, interface engineering and band gap engineering for enhancing the photocatalytic activity. An approach to recover the photocatalytic material via immobilization is also presented. This book brings to light much of the recent research in the development of such semiconductor photocatalytic systems. The book will thus be of relevance to researchers in the field of: material science, environmental science & technology, photocatalytic applications, newer methods of energy generation & conversion and industrial applications. 

This book systematically analyzes the applicability of big data analytics and Industry 4.0 from the perspective of semiconductor manufacturing management. It reports in real examples and presents case studies as supporting evidence. In recent years, technologies of big data analytics and Industry 4.0 have been frequently applied to the management of semiconductor manufacturing. However, related research results are mostly scattered in various journal issues or conference proceedings, and there is an urgent need for a systematic integration of these results. In addition, many related discussions have placed too much emphasis on the theoretical framework of information systems rather than on the needs of semiconductor manufacturing management. This book addresses these issues.

This book describes the basic physical principles of techniques to generate and ultrashort pulse lasers and applications to ultrafast spectroscopy of various materials covering chemical molecular compounds, solid-state materials, exotic novel materials including topological materials, biological molecules and bio- and synthetic polymers. It introduces non-linear optics which provides the basics of generation and measurement of pulses and application examples of ultrafast spectroscopy to solid state physics. Also it provide not only material properties but also material processing procedures. The book describes also details of the world shortest visible laser and DUV lasers developed by the author's group. It is composed of the following 12 Sections: The special features of this book is that it is written by a single author with a few collaborators in a systematic way. Hence it provides a comprehensive and systematic description of the research field of ultrashort pulse lasers and ultrafast spectroscopy.Generation of ultrashort pulses in deep ultraviolet to near infraredGeneration of ultrashort pulses in terahertzCarrier envelope phase (CEP)Simple NLO processes with a few colorsMulti-color involved NLO processesMulti-color ultrashort pulse generationNLO materialsNLO processes in time-resolved spectroscopyLow dimension materialsConductors and superconductorsChemical reactions and material processingPhotobiological reactions

This book highlights the fabrication of orientation-controlled colloidal quantum well (nanoplatelet) thin films using liquid interface self-assembly. The book details methods for orientation-controlled deposition of CdSe core nanoplatelets for characterization of directional energy transfer in nanoplatelets and layer-by-layer construction of CdSe/CdZnS core/shell nanoplatelets to create optically active waveguides with precisely tunable thickness and excellent uniformity across device scale. It also provides a future outlook for construction of large-scale two- and three-dimensional nanoplatelet superstructures and their incorporation into device fabrication.

The autobiography of the designer of the World's First Microprocessor, the device that started the digital revolution. A military project, it was a secret until 1998.A story of opportunity and excellence.2nd Version, 2022. All rights reserved.

This book describes in detail the construction and working principle of a variety of commercially available hysteresis machines. The last part of the book is devoted to a comprehensive study of an experimental hysteresis machine.

This reference text presents a thorough discussion of the interface between quantum mechanics and real-world device simulation with an emphasis on the use of particles in the simulation.

The book describes the origin, principle of operation, development, advantages and disadvantages, applications, and frontiers of research for new-technology flowmeters: Coriolis, magnetic, ultrasonic, vortex, and thermal. It focuses on the newer, faster growing flowmeter markets, while placing them in the context of more traditional meters.

Polymer Electrolytes and their Composites for Energy Storage/Conversion Devices presents a state-of-the-art overview of the research and development in the use of polymers as electrolyte materials for various applications. It covers types of polymer electrolytes, ion dynamics, and the role of dielectric parameters and a review of applications. Divided into two parts, the first part of the book focuses on the types of polymer electrolytes, ion dynamics, and the role of dielectric parameters, while the second part provides a critical review of applications based on polymer electrolytes and their composites. This book:Presents the fundamentals of polymer composites for energy storage/conversion devicesExplores the ion dynamics and dielectric properties role in polymer electrolytesProvides detailed preparation methods and important characterization techniques to evaluate the electrolyte potentialReviews analysis of current updates in polymer electrolytesIncludes various applications in supercapacitor, battery, fuel cell, and electrochromic windowsThe book is aimed at researchers and graduate students in physics, materials science, chemistry, materials engineering, energy storage, engineering physics, and industry.

Driven by continuing pursuits in device miniaturization and performance improvement, emergent micro- and nanomaterials hold the keys to enabling next-generation technologies in optical, infrared, and terahertz applications, owing to their unique properties and strong responses in these frequency bands. Development of these fascinating materials has triggered a number of opportunities in the applied sciences, and some have even made their impact in the market. Emergent Micro- and Nanomaterials for Optical, Infrared, and Terahertz Applications reviews state-of-the-art developments in various emergent materials and their implementation in applications such as sensors, waveplates, communications, and light sources, among others. The book discusses the similarities, advantages, and limitations and offers a comparative of each material. This volume:Covers all emergent materials (natural and artificial) that are promising for optical, infrared, and terahertz applicationsComparatively analyzes these materials, elucidating their unique advantages, limitations, and application scopesProvides an up-to-date record on achievements and progress in cutting-edge optical, infrared, and terahertz applicationsOffers a comprehensive overview to connect multidisciplinary fields, such as materials, physics, and optics, to serve as a basis for future progressThis book is a valuable reference for engineers, researchers, and students in the areas of materials and optics, as well as physics, and will benefit both junior- and senior-level researchers.

With millions of new users and several new models, the Raspberry Pi ecosystem continues to expandalong with a lot of new questions about the Pis capabilities. The second edition of this popular cookbook provides more than 240 hands-on recipes for running this tiny low-cost computer with Linux, programming it with Python, and hooking up sensors, motors, and other hardwareincluding Arduino and the Internet of Things.Prolific hacker and author Simon Monk also teaches basic principles to help you use new technologies with Raspberry Pi as its ecosystem continues to develop. This cookbook is ideal for programmers and hobbyists familiar with the Pi through resources, including Getting Started with Raspberry Pi (OReilly). Python and other code examples from the book are available on GitHub.Set up your Raspberry Pi and connect to a networkWork with its Linux-based operating systemProgram Raspberry Pi with PythonGive your Pi "e;eyes"e; with computer visionControl hardware through the GPIO connectorUse Raspberry Pi to run different types of motorsWork with switches, keypads, and other digital inputsUse sensors to measure temperature, light, and distanceConnect to IoT devices in various waysCreate dynamic projects with Arduino

This research and reference text provides up-to-date coverage of the latest research on hot carriers in semiconductors, with a focus on the background, theoretical approaches, measurements and physical understanding required to engage with the field. Pitched at an introductory level, it equips researchers transitioning from optics to fully understand the role of hot carriers in semiconductors, and is a core text for graduate courses in hot carrier phenomena.

Microelectronics is a challenging course to many undergraduate students and is often described as very messy. Before taking this course, all the students have learned circuit analysis, where basically all the problems can be solved by applying Kirchhoff's

This book outlines the principles of thermoelectric generation and refrigeration from the discovery of the Seebeck and Peltier effects in the nineteenth century through the introduction of semiconductor thermoelements in the mid-twentieth century to the more recent development of nanostructured materials. It is shown that the efficiency of a thermoelectric generator and the coefficient of performance of a thermoelectric refrigerator can be related to a quantity known as the figure of merit. The figure of merit depends on the Seebeck coefficient and the ratio of the electrical to thermal conductivity. It is shown that expressions for these parameters can be derived from the band theory of solids. The conditions for favourable electronic properties are discussed. The methods for selecting materials with a low lattice thermal conductivity are outlined and the ways in which the scattering of phonons can be enhanced are described. The application of these principles is demonstrated for specific materials including the bismuth telluride alloys, bismuth antimony, alloys based on lead telluride, silicon-germanium and materials described as phonon-glass electron-crystals. It is shown that there can be advantages in using the less familiar transverse thermoelectric effects and the transverse thermomagnetic effects. Finally, practical aspects of thermoelectric generation and refrigeration are discussed. The book is aimed at readers who do not have a specialised knowledge of solid state physics.