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Engineering Interfacial Effects And Layered Behavior In 2d Materials
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Book Synopsis Engineering Interfacial Effects and Layered Behavior in 2D Materials by : Nathan P. Wilson
Download or read book Engineering Interfacial Effects and Layered Behavior in 2D Materials written by Nathan P. Wilson and published by . This book was released on 2020 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rise of two-dimensional (2D) materials over the last one-and-a-half decades can be attributed to two separate reasons. The first is the discovery of new materials with unique properties that derive partially, if not entirely from their low dimensionality, as is the case for 2D Chern insulators. The second is the ability to combine 2D materials together arbitrarily through van der Waals stacking to form custom layered structures with engineered properties. But more than just offering a new knob for controlling materials, van der Waals heterostructures have produced to breakthrough discoveries in basic science, helping us create new electronic phases and explore topology in new ways. Central to producing these effects are the different types of interactions between layers, from the most trivial effects like dielectric screening to more complex interactions like interlayer charge transfer and exchange interactions. Consequently, learning how to control interlayer interactions and predict the physical outcomes they produce has become a key scientific challenge in the 2D materials community. In this dissertation, several approaches to engineering, controlling, and harnessing the power of interlayer and interfacial effects in various 2D material systems are explored. First, we introduce a new, powerful spectroscopic tool for understanding the effects of quantum confinement on excitons, optically excited and bound electron-hole pairs, in 2D semiconductors, and use it to explore the intricacies of the Hamiltonian of these 2D excitons. We then discuss the novel properties of heterobilayers of 2D semiconductors which host interlayer excitons in which the electron and hole reside in opposite layers, and present a simple approach to enhancing the beneficial properties of these interlayer excitons for studying their many-body physics by modifying the interlayer interaction with a tunneling barrier. Finally, we use various optical and spectroscopic probes to investigate a new type of behavior found in layered magnetic van der Waals materials, layered magnetism, which results from the fundamental anisotropy of the materials. We analyze a simple approach to engineering the interlayer magnetic coupling in such materials, and uncover a deep, underlying connection between the layered magnetic order and the optical excitations in a newly discovered 2D magnetic semiconductor.
Book Synopsis Layered Two-Dimensional Heterostructures and Their Tunneling Characteristics by : Sergio C. de la Barrera
Download or read book Layered Two-Dimensional Heterostructures and Their Tunneling Characteristics written by Sergio C. de la Barrera and published by Springer. This book was released on 2017-11-21 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis demonstrates that layered heterostructures of two-dimensional crystals graphene, hexagonal boron nitride, and transition metal dichalcogenides provide new and interesting interlayer transport phenomena. Low-energy electron microscopy is employed to study the surface of atomically thin WSe2 prepared by metal-organic chemical vapor deposition on epitaxial graphene substrates, and a method for unambiguously measuring the number of atomic layers is presented. Using very low-energy electrons to probe the surface of similar heterostructures, a relationship between extracted work function differences from the layers and the nature of the electrical contact between them is revealed. An extension of this analysis is applied to surface studies of MoSe2 prepared by molecular beam epitaxy on epitaxial graphene. A large work function difference is measured between the MoSe2 and graphene, and a model is provided which suggests that this observation results from an exceptional defect density in the MoSe2 film. The thesis expounds a theory for computing tunneling currents between two-dimensional crystals separated by a thin insulating barrier; a few situations resulting in resonant tunneling and negative differential resistance are illustrated by computed examples, as well as observed characteristics, for monolayer and bilayer graphene tunneling junctions and transistors.
Book Synopsis Characterization and Modification of Graphene-Based Interfacial Mechanical Behavior by : Guorui Wang
Download or read book Characterization and Modification of Graphene-Based Interfacial Mechanical Behavior written by Guorui Wang and published by Springer Nature. This book was released on 2020-08-21 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis shares new findings on the interfacial mechanics of graphene-based materials interacting with rigid/soft substrate and with one another. It presents an experimental platform including various loading modes that allow nanoscale deformation of atomically thin films, and a combination of atomic force microscopy (AFM) and Raman spectroscopy that allows both displacement and strain to be precisely measured at microscale. The thesis argues that the rich interfacial behaviors of graphene are dominated by weak van der Waals force, which can be effectively modulated using chemical strategies. The continuum theories are demonstrated to be applicable to nano-mechanics and can be used to predict key parameters such as shear/friction and adhesion. Addressing key interfacial mechanics issues, the findings in thesis not only offer quantitative insights in the novel features of friction and adhesion to be found only at nanoscale, but will also facilitate the deterministic design of high-performance graphene-based nanodevices and nanocomposites.
Book Synopsis Understanding and Engineering Molecular Interactions and Electronic Transport at 2D Materials Interfaces by : Chih-Jen Shih (Ph. D.)
Download or read book Understanding and Engineering Molecular Interactions and Electronic Transport at 2D Materials Interfaces written by Chih-Jen Shih (Ph. D.) and published by . This book was released on 2014 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2D materials are defined as solids with strong in-plane chemical bonds but weak out-of-plane, van der Waals (vdW) interactions. In order to realize potential applications of 2D materials in the areas of optoelectronics, surface modification, and complex materials, there are many engineering challenges associated with understanding and engineering molecular interactions at 2D materials interfaces, which requires understanding and engineering multiscale physical phenomena. With this in mind, the goal of this thesis has been to combine continuum modeling, molecular dynamics (MD) simulations, chemical synthesis, and device fabrication to understand and engineer molecular interactions at 2D materials interfaces at different length scales. The three main topics considered include: (i) wetting behavior of graphene (micrometer scale), (ii) solution processing of graphene and graphene oxide (nanometer scale), and (iii) electronic modification in graphene and molybdenum disulfide (atomic scale). The first part of my thesis investigates the wetting behavior of graphene-coated surfaces. Based on the classical theory of van der Waals interactions, monolayer graphene acts like a "nonlinear translucent" barrier, transmitting about 30% of the original water-substrate interactions through it. The contact angle on a graphene-coated substrate is determined by both liquid-graphene and liquid- substrate interactions. This, in turn, results in different degrees of "wetting transparency". By combining theoretical analysis, MD simulations, and contact angle measurements, I show that monolayer graphene becomes more "transparent" to wetting on hydrophilic substrates and more "opaque" to wetting on hydrophobic substrates. The second part of my thesis develops a fundamental understanding and engineering strategies to disperse graphene and graphene oxide in a liquid phase. The mechanism of stabilization of liquid-phase exfoliated graphene sheets in polar solvents is investigated using potential of mean force (PMF) calculations and MD simulations. Along with a kinetic theory of colloid aggregation, the graphene sheets are predicted to aggregate based on thermodynamic arguments. Because of the different affinities of various solvents for the surface of graphene, efficient solvents can enhance the stability of the graphene sheets by: (i) reducing the depth of the vdW well, and (ii) increasing the energy barrier. Using the calculated PMF curves associated with different solvents, with only one adjustable parameter, the kinetic theory is able to predict the lifetimes of graphene sheets, including ranking the five solvents considered in terms of their ability to stabilize graphene. In addition, I present an advanced concept for the layer-controlled production of pristine large graphene dispersions. The use of ionic graphite intercalation compounds to produce Stage-2 and Stage-3 graphite intercalation compounds (GICs) are shown to be excellent precursors for the production of bilayer and tri-layer graphene dispersions. When combined with an on-chip separation method, a population of large area graphene flakes is produced, such that conventional photolithography is enabled for top-gate device fabrication. My present approach enables the only viable route at this time to produce AB stacked bi- and tri-layer graphene on arbitrary substrates on a large scale. Moreover, a comparative study that combines experiments and MD simulations is carried out to understand the effects of pH on the colloidal stability and surface activity of graphene oxide (GO) aqueous solutions. The reported pH-dependent behavior originates from the degree of deprotonation of the carboxyl groups at the edge of GO sheets. At low pH, the carboxyl groups are protonated, such that the GO sheets become less hydrophilic and form suspended GO aggregates. The GO aggregates formed at lower pH are found to be surface active and do not exhibit the salient critical-micelle-concentration (CMC) feature associated with the formation of surfactant micelles. At higher pH, the carboxyl groups are deprotonated and the strong hydrophilicity of the edge carboxyl groups pulls the GO sheets into bulk water, making GO behave like a regular salt dissolved in water. A series of surface tension measurements further suggests that GO does not behave like a conventional surfactant in both pH 1 and pH 14 aqueous solutions. The third part of my thesis develops engineering strategies to modify electronic characteristics of graphene using molecular adsorption, covalent functionalization, and a molybdenum disulfide (MoS2) - graphene heterojunction. I investigate the effects of surfactant adsorbates on transport characteristics in graphene transistors. The surfactant adsorbates are found to: (i) transfer electrons to graphene, (ii) scatter carrier transport, and (iii) induce more electron-hole puddles on the SiO2 substrate. The mechanism behind the unusually observed behaviors can be rationalized using a new theoretical model based on the self-consistent transport theory. I find that the change in transport characteristics is surfactant-dependent, and results from the interactions between the surfactant adsorbates, graphene, and the underlying SiO2 . In addition, I demonstrate an efficient method to covalently functionalize monolayer and bilayer graphene (MLG and BLG) in a precise and controllable manner using electrochemical aryl diazonium chemistry. Using this method, for the first time, I study the transport characteristics of bottom-gated MLG and dual-gated BLG field effect transistor (FET) devices as a function of the degree of functionalization, which provides insight on the electronic transport in functionalized graphene. I show that the electronic transport in functionalized graphene is limited by the formation of electron-hole puddles and mid-gap states due to chemical functionalization. A more significant transport band gap can be created in functionalized BLG at a highly positive transverse electric displacement field. Moreover, I investigate charge transfer, photoluminescence, and gate-controlled electronic transport in the junction between two 2D materials - MoS2 and graphene. Without applying any transverse electric fields, there is a significant number of electrons transferred from MoS2 to graphene due to their work function difference. The charge transfer also results in the formation of a Schottky barrier at the interface, increasing interlayer impedance between the two materials. Despite the interlayer impedance, the quantum yield for MoS2 in the heterostructure is still considerably quenched, since the hot carriers generated in MoS2 during photoexcitation can overcome the barrier readily, subsequently being collected by the adjacent graphene layer. I fabricate FET devices comprised of the MoS2 - graphene heterostructure, and show that the interlayer impedance can be further manipulated by the gate and drain voltages, demonstrating a new type of FET device, which enables a controllable transition from NMOS digital to bipolar characteristics. I show that an on/off current ratio ~100 can be achieved without sacrificing the field-effect electron mobilities in graphene. This thesis advances our understanding on how to engineer molecular interactions at 2D materials interfaces. Specifically, I demonstrate that by combining continuum theory, MD simulations, chemical synthesis, and device fabrication, one can elucidate the multiscale physics underlying these interactions, and further propose new engineering approaches to overcome the associated challenges. There is ample opportunity and need for the combined theoretical and experimental studies in this emerging field to understand and design these nanoscale materials for various electronic, energy, and environmental applications. As reflected in this thesis, it is hoped that the interactive connections between theories and experiments, as well as the engineering innovations driven by multiscale understanding, will significantly facilitate the development of 2D materials commercialization.
Book Synopsis Preparation and Properties of 2D Materials by : Byungjin Cho
Download or read book Preparation and Properties of 2D Materials written by Byungjin Cho and published by MDPI. This book was released on 2020-12-10 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the great success of graphene, atomically thin-layered nanomaterials, called two dimensional (2D) materials, have attracted tremendous attention due to their extraordinary physical properties. Specifically, van der Waals heterostructured architectures based on a few 2D materials, named atomic-scale Lego, have been proposed as unprecedented platforms for the implementation of versatile devices with a completely novel function or extremely high-performance, shifting the research paradigm in materials science and engineering. Thus, diverse 2D materials beyond existing bulk materials have been widely studied for promising electronic, optoelectronic, mechanical, and thermoelectric applications. Especially, this Special Issue included the recent advances in the unique preparation methods such as exfoliation-based synthesis and vacuum-based deposition of diverse 2D materials and also their device applications based on interesting physical properties. Specifically, this Editorial consists of the following two parts: Preparation methods of 2D materials and Properties of 2D materials
Book Synopsis Fundamentals of Interfacial Engineering by : Robert J. Stokes
Download or read book Fundamentals of Interfacial Engineering written by Robert J. Stokes and published by John Wiley & Sons. This book was released on 1996-12-27 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eine in sich geschlossene, umfassende Einführung in die Grundlagen der Grenzflächenphänomene und ihrer Anwendung auf Prozesse und Produktdesign - geschrieben für Ingenieure aus Chemie, Elektronik und Biomedizin. Zwischenmolekulare Wechselwirkungen an der Grenzfläche werden ausführlich behandelt; Eigenschaften, Verarbeitung und Verhalten fluider Grenzflächen werden ebenso diskutiert wie Ober- und Grenzflächenmerkmale fester Stoffe. Dieses Buch ist relevant für den Praktiker in der Industrie, stellt aber gleichzeitig eine wertvolle Hilfe für Lehrkräfte ingenieurwissenschaftlicher Fachrichtungen bei der Ausbildungsplanung dar.
Book Synopsis Dynamic Behavior of Materials, Volume 1 by : Bo Song
Download or read book Dynamic Behavior of Materials, Volume 1 written by Bo Song and published by Springer. This book was released on 2014-08-08 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Behavior of Materials, Volume 1: Proceedings of the 2014 Annual Conference on Experimental and Applied Mechanics, the first volume of eight from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Experimental Mechanics, including papers on: · General Dynamic Materials Response · Novel Dynamic Testing Techniques · Dynamic Fracture and Failure · Dynamic Behavior of Geo-materials · Dynamic Behavior of Composites and Multifunctional materials · Dynamic Behavior of Low-Impedance materials · Dynamic Modeling and Simulation of Dynamic Behavior of Materials · Quantitative Visualization of Dynamic Behavior of Materials · Shock/Blast Loading of Materials · Interface and Structural Dynamics · Material Response
Book Synopsis Interface Engineering in Organic Field-Effect Transistors by : Xuefeng Guo
Download or read book Interface Engineering in Organic Field-Effect Transistors written by Xuefeng Guo and published by John Wiley & Sons. This book was released on 2023-09-25 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Systematic summary of advances in developing effective methodologies of interface engineering in organic field-effect transistors, from models to experimental techniques Interface Engineering in Organic Field-Effect Transistors covers the state of the art in organic field-effect transistors and reviews charge transport at the interfaces, device design concepts, and device fabrication processes, and gives an outlook on the development of future optoelectronic devices. This book starts with an overview of the commonly adopted methods to obtain various semiconductor/semiconductor interfaces and charge transport mechanisms at these heterogeneous interfaces. Then, it covers the modification at the semiconductor/electrode interfaces, through which to tune the work function of electrodes as well as reveal charge injection mechanisms at the interfaces. Charge transport physics at the semiconductor/dielectric interface are discussed in detail. The book describes the remarkable effect of SAM modification on the semiconductor film morphology and thus the electrical performance. In particular, valuable analysis of charge trapping/detrapping engineering at the interface to realize new functions are summarized. Finally, the sensing mechanisms that occur at the semiconductor/environment interfaces of OFETs and the unique detection methods capable of interfacing organic electronics with biology are discussed. Specific sample topics covered in Interface Engineering in Organic Field-Effect Transistors include: Noncovalent modification methods, charge insertion layer at the electrode surface, dielectric surface passivation methods, and covalent modification methods Charge transport mechanism in bulk semiconductors, influence of additives on materials’ nucleation and morphology, solvent additives, and nucleation agents Nanoconfinement effect, enhancing the performance through semiconductor heterojunctions, planar bilayer heterostructure, ambipolar charge-transfer complex, and supramolecular arrangement of heterojunctions Dielectric effect in OFETs, dielectric modification to tune semiconductor morphology, surface energy control, microstructure design, solution shearing, eliminating interfacial traps, and SAM/SiO2 dielectrics A timely resource providing the latest developments in the field and emphasizing new insights for building reliable organic electronic devices, Interface Engineering in Organic Field-Effect Transistors is essential for researchers, scientists, and other interface-related professionals in the fields of organic electronics, nanoelectronics, surface science, solar cells, and sensors.
Book Synopsis 2D Monoelemental Materials (Xenes) and Related Technologies by : Zongyu Huang
Download or read book 2D Monoelemental Materials (Xenes) and Related Technologies written by Zongyu Huang and published by CRC Press. This book was released on 2022-04-19 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monoelemental 2D materials called Xenes have a graphene-like structure, intra-layer covalent bond, and weak van der Waals forces between layers. Materials composed of different groups of elements have different structures and rich properties, making Xenes materials a potential candidate for the next generation of 2D materials. 2D Monoelemental Materials (Xenes) and Related Technologies: Beyond Graphene describes the structure, properties, and applications of Xenes by classification and section. The first section covers the structure and classification of single-element 2D materials, according to the different main groups of monoelemental materials of different components and includes the properties and applications with detailed description. The second section discusses the structure, properties, and applications of advanced 2D Xenes materials, which are composed of heterogeneous structures, produced by defects, and regulated by the field. Features include: Systematically detailed single element materials according to the main groups of the constituent elements Classification of the most effective and widely studied 2D Xenes materials Expounding upon changes in properties and improvements in applications by different regulation mechanisms Discussion of the significance of 2D single-element materials where structural characteristics are closely combined with different preparation methods and the relevant theoretical properties complement each other with practical applications Aimed at researchers and advanced students in materials science and engineering, this book offers a broad view of current knowledge in the emerging and promising field of 2D monoelemental materials.
Book Synopsis Understanding and Engineering Electronic and Optoelectronic Properties of 2D Materials and Their Interfaces by : Youngwoo Son (Ph. D.)
Download or read book Understanding and Engineering Electronic and Optoelectronic Properties of 2D Materials and Their Interfaces written by Youngwoo Son (Ph. D.) and published by . This book was released on 2016 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the pursuit of further miniaturization beyond Moore's law, tremendous effort has been dedicated to exploring the potential of two-dimensional (2D) materials for nanoscale electronic devices. 2D materials are a group of solid state materials that possess strong in-plane covalent bonds while individual atomic layers are held together by weak van der Waals (vdW) interactions. Hence, their bulk crystals can be exfoliated into few-layer or even atomically thin single-layers via micro-mechanical exfoliation techniques. These materials possess unique and exotic properties due to quantum confinement of importance to future electronics. However, many technical problems need to be solved to realize this goal. For example, as 2D material based devices become smaller down to the nanometer scale, the electrical contacts must also be reduced in scale which creates different characteristics from those of macroscopic counterparts. In addition, there are issues of reliability and stability with devices comprised of such materials. There is a need to understand the electronic and chemical properties of several interfaces that arise in such materials: metal-2D and 2D-2D junctions, for example. To this end, this thesis focuses on understanding nanoscale metal-2D semiconductor (SC) and 2D SC-2D SC junctions exploring: (1) electronic and optoelectronic behavior at the nanoscale junction of metal-MoS2 and dependence on the layer number (thickness), (2) realization of voltage selectable photodiodes based on a lateral in-plane MoS2-WSe2 heterojunctions, and (3) interfacial properties and (opto)electronic characteristics of a phosphorene-MoS2 vertical vdW p-n junction. The first part of this thesis explores the layer number dependent electrical characteristics of the MoS2-metal nanoscale junction using current imaging of MoS2 nanosheets consisting of regions of varying different thicknesses using conductive and photoconductive spectral atomic force microscopy (C- and PCS-AFM). The layer number dependence of the effective barrier was measured, by obtaining consecutive current images while changing bias voltages, showing it to be linear. At the same time, spatially resolved two-dimensional (2D) maps of local electrical properties are generated from simultaneously recorded local current-voltage (IV) data. Furthermore, the layer number dependent spectral photoresponse of MoS2 is investigated, which shows the highest response in single layer (1L) region. The photoresponse decreases for increasing layer number, but increases again between 4L and 1 OL due to increased light absorption. The photoresponse is also strongly dependent on the wavelength of the incident light, showing much higher currents for photon energies that are above the optical bandgap. The photoresponse in forward and reverse biases shows barrier symmetry for 1 L but asymmetry for 2, 3, and 4L, which further indicates a dominant role of the barrier on carrier transport at the junction. The second part of this thesis investigates the spatially resolved transverse electrical properties of the monolayer WSe2 -MoS2 lateral p-n heterostructures at their nanoscale junctions with metals both in the dark and under laser illumination. As in the first part of the thesis, C- and PCS-AFM, versatile tools to conveniently and efficiently interrogate layer-dependent electronic and optoelectronic characteristics in a MoS2 crystal containing regions of different thicknesses, which enables direct characterization and comparison of the different layer regions without the complexities associated with fabricating and testing of different individual field-effect transistor devices, are used for measurements. By performing current imaging using a PtIr-coated conductive tip on an ultrathin nanosheet that includes homogeneous crystals of WSe2 and MoS2 and a lateral junction region in between, many thousands of WSe2/MoS2/the junction-metal contact points form during imaging and directly compare their local properties at the same time under identical experimental conditions with the nanoscale spatial resolution. The third part of this thesis explores a new type of 2D vertical heterostructures that simultaneously possess desirable properties of constituent materials, paving the path for overcoming intrinsic shortcomings of each component material to be used as an active material in nanoelectronic devices. As a first example, a MoS 2-graphene vertical heterostructure is constructed and its charge transfer and photoluminescence (PL) at the interface are investigated. C-AFM and Raman spectroscopy show that there is a significant charge transfer between the two component materials. The PL intensity of monolayer MoS2 is noticeably quenched when in contact with a single layered graphene in comparison to that of a bare monolayer MoS2 crystal. Then, with the acquired understanding of the underlying physics at the 2D vdW heterointerfaces, the possibility of a black phosphorus (BP)-MoS2 vertical heterostructure as an ultrathin channel material for high-performance 2D (opto)electronic devices is studied. CVD-synthesized MoS2 and micromechanically exfoliated BP crystals are stacked together to form a vertical p-n heterostructure. Optical microscopy, AFM images, and Raman spectroscopy data show that the MoS2 thin films can be used as a passivation layer, protecting BP from deteriorating in ambient conditions for extended period of time or under an elevated temperature in an Ar environment. The IV characteristics of FET devices based on the vertical heterostuctures exhibit that the MoS2 layer has limited impact on superior carrier transport properties of the BP in the dark. Upon light illumination, photoconductivity of the BP-MoS2 heterostructure region increased compared to that of the bare BP region of the same flake, mainly due to the fact that a built-in electric field formed at the BP-MoS2 interface facilitates the dissociation of electron-hole pairs generated by light absorption.
Book Synopsis Integration of 2D Materials for Electronics Applications by : Filippo Giannazzo
Download or read book Integration of 2D Materials for Electronics Applications written by Filippo Giannazzo and published by MDPI. This book was released on 2019-02-13 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Integration of 2D Materials for Electronics Applications" that was published in Crystals
Book Synopsis Valleytronics In 2d Materials by : Kuan Eng Johnson Goh
Download or read book Valleytronics In 2d Materials written by Kuan Eng Johnson Goh and published by World Scientific. This book was released on 2023-06-26 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven by the advent of two-dimensional materials, valleytronics is emerging as the next hot field of research in materials science. While the use of charge or spin degrees of freedom in electronic materials as information carriers is familiar and well-appreciated, employment of the valley degree of freedom as an information carrier has remained elusive for many decades. Shortly following the discovery of isolated graphene, 2D semiconductors such as transition metal dichalcogenides were also isolated and investigated. We now understand that these materials can have separately addressable valleys because each valley can be uniquely coupled to a spin state. This imparts the ability to address different valleys (like pseudospins) with electric field, magnetic field, or light, and there is now a real possibility to engineer practical devices based on using valley as the information carrier.Valleytronics in 2D Materials is the first book in the world on the topic of valleytronics. The reader is introduced to the concept via a brief history emphasizing the challenges that impeded its development for so long. We then dive into the valley physics of 2D semiconductors to explain the recent excitement in 2D valleytronics, the scientific investigations to confirm the addressable valleys, and the attempts to engineer valley devices for practical purposes. The text takes on a decidedly practical approach towards the subject, seeking to bring the reader quickly into the field by presenting the minimum theoretical basis for understanding the use of the valley degree of freedom in devices. A selection of key works establishing the scientific underpinnings of valley addressability and control are described to help the reader grasp the current stage of understanding, the technical foundations established, and the open questions. The renewal in valleytronics is yet unfinished, but with more than a decade of research and engineering efforts devoted in recent times, this book seeks to provide a timely reference for students, scientists and engineers to join this exciting journey and perhaps help to create the next disruption in information technology.
Book Synopsis Defects in Two-Dimensional Materials by : Rafik Addou
Download or read book Defects in Two-Dimensional Materials written by Rafik Addou and published by Elsevier. This book was released on 2022-02-14 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Defects in Two-Dimensional Materials addresses the fundamental physics and chemistry of defects in 2D materials and their effects on physical, electrical and optical properties. The book explores 2D materials such as graphene, hexagonal boron nitride (h-BN) and transition metal dichalcogenides (TMD). This knowledge will enable scientists and engineers to tune 2D materials properties to meet specific application requirements. The book reviews the techniques to characterize 2D material defects and compares the defects present in the various 2D materials (e.g. graphene, h-BN, TMDs, phosphorene, silicene, etc.). As two-dimensional materials research and development is a fast-growing field that could lead to many industrial applications, the primary objective of this book is to review, discuss and present opportunities in controlling defects in these materials to improve device performance in general or use the defects in a controlled way for novel applications. Presents the theory, physics and chemistry of 2D materials Catalogues defects of 2D materials and their impacts on materials properties and performance Reviews methods to characterize, control and engineer defects in 2D materials
Book Synopsis Semiconductors, Dielectrics, and Metals for Nanoelectronics 13 by : S. Kar
Download or read book Semiconductors, Dielectrics, and Metals for Nanoelectronics 13 written by S. Kar and published by The Electrochemical Society. This book was released on 2015 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Engineering Materials III by : Jing Long Bu
Download or read book Advanced Engineering Materials III written by Jing Long Bu and published by Trans Tech Publications Ltd. This book was released on 2013-08-30 with total page 2500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected, peer reviewed papers from the 3rd International Conference on Advanced Engineering Materials and Technology (AEMT 2013), May 11-12, 2013, Zhangjiajie, China
Book Synopsis Ambipolar Materials and Devices by : Ye Zhou
Download or read book Ambipolar Materials and Devices written by Ye Zhou and published by Royal Society of Chemistry. This book was released on 2020-09-15 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent development of ambipolar materials involving materials design, fundamental principles, interface modifications, device structures, characteristics and promising applications.
Download or read book Non-layered 2D Materials written by and published by Elsevier. This book was released on 2023-11-20 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductors and Semimetals series, highlights new advances in the field, with this new volume presenting interesting chapters. Each chapter is written by an international board of authors. The existence of this book is a testament to the dedication and expertise of our esteemed authors and contributors from across the globe, all of whom are at the forefront of this rapidly evolving field Serves as your gateway to a comprehensive exploration of non-layered 2D materials Not only teaches you something new but also sparks your creativity and curiosity
