Download or read book Electrical Transport and Thermal Expansion in Van Der Waals Materials written by Lei Jing and published by . This book was released on 2013 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Novel two-dimensional materials with weak interlayer Van der Waals interaction are fantastic platforms to study novel physical phenomena. This thesis describes our investigation on two different Van der Waals materials: graphene and bismuth selenide with calcium doping (Ca [subscript x] Bi [subscript 2-x] Se[subscript 3] , x as the doping level) in the topological insulator family. Firstly, we characterize the electrical transport behaviors of high-quality substrate-supported bilayer graphene devices with suspended metal gates. The device exhibits a transport gap induced by external electric field with an on/off ratio of 20,000, which could be explained by variable range hoping between localized states or disordered charge puddles. At large magnetic field, the device presents quantum Hall plateau at fractional values of conductance quantum, which arises from the equilibration of edge states between differentially doped regions. Secondly, we present our study on the electronic transport of Ca[subscript x] Bi [subscript 2-x] Se [subscript 3] thin films, which are three-dimensional topological insulators and coupled with superconducting leads. In these novel Josephson transistors, we observe different characteristic features by energy dispersion spectrum (EDS) and Raman spectroscopy, and the weak suppression in the critical current I [subscript c]. Thirdly, we explore the thermal expansion of suspended graphene. By in-situ scanning electron microscope (SEM), we measure the thickness-dependence of graphene's negative thermal expansion coefficient (TEC). We propose that there is a competitive relation between the intrinsic TEC and the friction from the substrate and the graphene. Lastly, in collaboration with Dr. Nikolai Kalugin from New Mexico Tech., we explore the graphene's application as a quantum Hall effect infrared photodetector. This graphene-based detector can be operated at higher temperature (liquid nitrogen) and wider frequency than the previous implementations of quantum Hall detector.
Download or read book Understanding Heat Transport at Interfaces for Thermal Management of Electronics written by Lenan Zhang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery and development of two-dimensional (2D) materials offer new opportunities for high-performance nanoscale electronics. However, new material systems involve new device architectures, which leads to new challenges on both the electronic and thermal design. While significant progress has been made to understand and engineer the electrical properties of 2D devices, the thermal problems remain relatively poorly understood. Since many 2D electronics can reach very high-power density (>104 W/cm2 ), the dense vertical integration of multilayers within a few nanometers leads to a significant temperature rise (>150 °C), which becomes the bottleneck of device performance. These thermal challenges are associated with two critical thermophysical properties of 2D materials, i.e., the thermal expansion and the interfacial thermal transport. In addition, to address the thermal management of 2D electronics, novel cooling approaches with insights gained from 2D thermal interfaces are in high demands. This thesis performed a systematic study on the thermal expansion and thermal transport of the van der Waals (vdW) bonded 2D interfaces, and developed highly efficient thermal management solutions based on two-phase cooling. First, we developed for the first time a pure experimental approach to accurately measure the thermal expansion coefficients(TECs) of various 2D materials. Our measurements confirmed the correct physical range of 2D monolayer TECs and hence addressed the more than two orders of magnitude discrepancies in literature. Second, we investigated the thermal transport across various 2D interfaces. In particular, we elucidated the role of vdW interaction in the anisotropic thermal transport of substrate-supported 2D monolayers and identified an optimal vdW interaction toward the maximum total heat transfer. On the other hand, we explored the twist-angle dependence of 2D interfacial thermal transport. We observed that depending on different material systems, the thermal transport of 2D materials can exhibit both strong and weak twist-angle dependences, which creates a new degree of freedom to manipulate heat at the atomic level. Lastly, with fundamental understanding of 2D thermal interfaces, we designed and optimized a liquid-vapor thin film evaporator based on microstructured surfaces, enabling high-performance thermal management of 2D electronics. This thesis provides a holistic understanding for the fundamental thermal properties of 2D materials and interfaces, which are critical to address the thermal crisis of 2D electronics. We believe the simulation, experimental, and design approaches developed in this thesis can serve as a guideline for the next-generation 2D electronics with unprecedented reliability and performance.
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1969 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Thermoelectricity written by H. Julian Goldsmid and published by Springer Science & Business Media. This book was released on 2009-10-03 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Thermoelectricity is the latest work by Professor Julian Goldsmid drawing on his 55 years experience in the field. The theory of the thermoelectric and related phenomena is presented in sufficient detail to enable researchers to understand their observations and develop improved thermoelectric materials. The methods for the selection of materials and their improvement are discussed. Thermoelectric materials for use in refrigeration and electrical generation are reviewed. Experimental techniques for the measurement of properties and for the production of thermoelements are described. Special emphasis is placed on nanotechnology which promises to yield great improvements in the efficiency of thermoelectric devices. Chapters are also devoted to transverse thermoelectric effects and thermionic energy conversion, both techniques offering the promise of important applications in the future.
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1970 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Engineering written by Susan Trolier-McKinstry and published by Cambridge University Press. This book was released on 2018 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: An easy-to-read textbook linking together bond strength and the arrangement of atoms in space with the properties that they control.
Download or read book Publications of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 2D Materials written by Phaedon Avouris and published by Cambridge University Press. This book was released on 2017-06-29 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn about the most recent advances in 2D materials with this comprehensive and accessible text. Providing all the necessary materials science and physics background, leading experts discuss the fundamental properties of a wide range of 2D materials, and their potential applications in electronic, optoelectronic and photonic devices. Several important classes of materials are covered, from more established ones such as graphene, hexagonal boron nitride, and transition metal dichalcogenides, to new and emerging materials such as black phosphorus, silicene, and germanene. Readers will gain an in-depth understanding of the electronic structure and optical, thermal, mechanical, vibrational, spin and plasmonic properties of each material, as well as the different techniques that can be used for their synthesis. Presenting a unified perspective on 2D materials, this is an excellent resource for graduate students, researchers and practitioners working in nanotechnology, nanoelectronics, nanophotonics, condensed matter physics, and chemistry.
Download or read book Publications of the National Bureau of Standards Catalog written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Bureau of Standards 1968 1969 written by Betty L. Oberholtzer and published by . This book was released on 1970 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 1128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics of Matter written by George C. King and published by John Wiley & Sons. This book was released on 2023-08-09 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physics of Matter First year core course introductory textbook on the nature of matter that puts the physics before mathematical description Physics of Matter is an introductory textbook on the nature of matter, based on a description of gases, liquids, liquid crystals and solids in terms of the forces that bind atoms and molecules together and their thermal motion, that discusses the relationship of these phases of matter to heat and the basic principles of thermodynamics. Physics of Matter is unique in its coverage of material and includes topics that have become important in recent times such as graphene and liquid crystals. Material in the book is reinforced by numerous worked examples in the text and problems and solutions at the end of each chapter, the latter ranging in difficulty from simple exercises to challenging problems. The emphasis is on clarity of exposition and explanation, putting the physics before the mathematical with general physical principles that can be more widely applied being stressed. Published in the Manchester Physics Series, which has the reputation of providing insight, depth, and often details on a subject not found in other textbooks, sample topics covered in Physics of Matter include: Characteristics of atoms (sizes and masses) and Avogadro’s number, the forces that bind atoms and molecules together, and the Lennard-Jones potential Thermal energy, temperature, and the Boltzmann law, covering equations of state, the ideal gas equation, and equipartition of energy Kinetic theory and transport properties of gases, covering molecular collisions, pressure of an ideal gas, the mean free path and diffusion Real gases, including Van der Waals equation of state, virial expansion, critical constants, and heat capacities Reversible processes, entropy, the Carnot cycle, the thermodynamic fundamental relationship, and Gibbs free energy Solids, including crystal structure, elastic moduli and Einstein’s model of heat capacity Liquids, including liquid flow and Bernoulli’s equation, and liquid crystals Physics of Matter is a valuable learning resource for first- and second-year students in physics, chemistry, and engineering, as well as those in adjacent science courses including environmental and biological sciences. The book is written for the subject traditionally called “Properties of Matter.”
Download or read book The Physics of Solids written by J. B. Ketterson and published by Oxford University Press. This book was released on 2016-10-28 with total page 1053 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive text covers the basic physics of the solid state starting at an elementary level suitable for undergraduates but then advancing, in stages, to a graduate and advanced graduate level. In addition to treating the fundamental elastic, electrical, thermal, magnetic, structural, electronic, transport, optical, mechanical and compositional properties, we also discuss topics like superfluidity and superconductivity along with special topics such as strongly correlated systems, high-temperature superconductors, the quantum Hall effects, and graphene. Particular emphasis is given to so-called first principles calculations utilizing modern density functional theory which for many systems now allow accurate calculations of the electronic, magnetic, and thermal properties.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993-08 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermoelectric Energy Conversion written by Ryoji Funahashi and published by Woodhead Publishing. This book was released on 2021-01-19 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoelectric Energy Conversion: Theories and Mechanisms, Materials, Devices, and Applications provides readers with foundational knowledge on key aspects of thermoelectric conversion and reviews future prospects. Sections cover the basic theories and mechanisms of thermoelectric physics, the chemical and physical aspects of classical to brand-new materials, measurement techniques of thermoelectric conversion properties from the materials to modules and current research, including the physics, crystallography and chemistry aspects of processing to produce thermoelectric devices. Finally, the book discusses thermoelectric conversion applications, including cooling, generation, energy harvesting, space, sensor and other emerging areas of applications. - Reviews key applications of thermoelectric energy conversion, including cooling, power generation, energy harvesting, and applications for space and sensing - Discusses a wide range of materials, including skutterudites, heusler materials, chalcogenides, oxides, low dimensional materials, and organic materials - Provides the fundamentals of thermoelectric energy conversion, including the physics, phonon conduction, electronic correlation, magneto-seebeck theories, topological insulators and thermionics
Download or read book Recent Advances in Manufacturing Processes and Systems written by Harshit K. Dave and published by Springer Nature. This book was released on 2022-03-03 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents select proceedings of 2nd International Conference on Recent Advances in Manufacturing (RAM 2021). The book provides insights into the current research trends and development in manufacturing processes. The topics covered include conventional and nonconventional manufacturing processes, micro and nano manufacturing processes, chemical and biochemical manufacturing, additive manufacturing, smart manufacturing, and sustainable and energy-efficient manufacturing. The contributions presented here are intended to stimulate new research directions in the manufacturing domain. This book will be useful for the beginners, researchers and professionals working in the area of industrial and production engineering and allied fields.
Download or read book Catalog of National Bureau of Standards Publications 1966 1976 Key word index written by United States. National Bureau of Standards. Technical Information and Publications Division and published by . This book was released on 1978 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
