Download or read book Thermal Phenomena in Nanostructured Materials and Devices written by Amy Marie Marconnet and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructuring leads to unique material properties and combinations of properties not naturally available in bulk materials. The study of these properties is critical to improving the device performance and reliability for a range of applications including electronics, thermoelectrics, and nanophotonics. This work focuses on efforts to push the thermal conductivity of nanostructured materials to the extremes: the thermal conductivity of carbon nanotubes (CNT) and nanotube-based materials can exceed that of metals, while the introduction of nanoscale boundaries (e.g. nanoscale pores in silicon nanowires) yields extremely low thermal conductivity materials. Furthermore, this nanostructuring also leads to unique combinations of properties. Porous silicon nanowires are a step towards the desired electron-crystal, phonon-glass combination ideal for thermoelectric applications, while thermally-conductive, mechanically-compliant carbon nanotube films for promising for electronics packaging. This work first explores how the high axial thermal conductivity of carbon nanotubes can be leveraged effectively in thin film and composites through detailed understanding of the phonon transport and measurements of CNT-based films. This work then investigates how nanostructuring silicon significantly reduces the thermal conductivity through enhanced boundary scattering and the possibility of phononic crystal effects. Specifically, measurements of individual, porous silicon nanowires and arrays of silicon nanowires show significant reduction in the thermal conductivity compared to bulk silicon. A detailed model for reduced thermal conductivity due to phonon boundary scattering is developed in conjunction with measurements. Finally, this work also examines how the composition and annealing conditions impact both thermal transport and photoluminescence in silicon-rich silicon nitride films.

Download or read book Thermal Conduction Phenomena in Nanostructured Semiconductor Devices and Materials written by Mr. Zijian Li and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal phenomena have become very important in a variety of nanostructured semiconductor devices and materials. The reduced dimensions and large interface densities lead to complex thermal phenomena which do not occur in bulk materials and larger devices. Successful designs of high-performance semiconductor devices, including phase change memory (PCM) and high electron mobility transistors (HEMT), rely on the accurate thermal characterization of thin film materials and improved understanding of nanoscale energy transport physics. This thesis addresses nanoscale thermal transport problems relevant for three promising electronics technologies. The first part of this work investigates thermal conduction phenomena in phase change memory. A combination of frequency-domain electrical thermometry and suspended microstructure design are used to measure the in- and out-of-plane thermal conductivities of thin-film Ge2Sb2Te5 in the amorphous and crystalline phases. The preferential grain orientation and mixed phase distribution lead to a reduced in-plane thermal conductivity that is 60% -- 80% of the out-of-plane value. Anisotropic heat conduction benefits PCM devices by reducing the programming current and mitigating the thermal disturbance to adjacent cells. A fully coupled electrothermal simulation unveils the detailed transient phase distribution during a programming operation, enabling more efficient structural designs for multilevel memory operation. This research extends the thermal characterization and modeling techniques to diamond-based high electron mobility transistors. The high thermal conductivity of the diamond provides superior thermal performance and allows for up to 10x higher power density. Nanoheaters down to 50 nm wide are patterned by electron-beam lithography in order to measure the thermal resistance experienced by the single transistor channel, the multi-gate configuration, and the device package. The thermal resistance data reveals the critical role of thermal interface between the GaN device layer and the diamond substrate. This work established a criterion for the diamond technology to be viable in HEMT applications. Specifically, the thermal interface resistance needs to be less than 30 m2K/GW. The lengthscales of thermal conduction studied in this research are further scaled down to a few nanometers in the final portion of this work. This work measures the thermal properties of the mirror material for extreme ultra-violet (EUV) lithography as the next-generation semiconductor manufacturing technology. The thermal transport across the interfaces of drastically different materials, such as the Mo/Si multilayers (2.8 nm / 4.1 nm), is important in the performance and reliability of the EUV mirrors. This work demonstrates strong anisotropy in the thermal conductivities of the multilayers, where the in-plane conductivity is 13 times higher than the out-of-plane value, owing to the high density of metal-semiconductor interfaces. This research reveals that thermal conduction in such periodic multilayer composites is largely determined by the nonequilibrium electron-phonon physics. A new model indicates that two additional mechanisms -- quasi-ballistic phonon transport normal to the metal film and inelastic electron-interface scattering -- can also impact conduction in metal-dielectric multilayers with period below 10 nm, the critical length scale for the EUV mirrors.

Download or read book Transport Phenomena in Micro and Nanoscale Functional Materials and Devices written by Joao B. Sousa and published by William Andrew. This book was released on 2021-03-23 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport Phenomena in Micro- and Nanoscale Functional Materials and Devices offers a pragmatic view on transport phenomena for micro- and nanoscale materials and devices, both as a research tool and as a means to implant new functions in materials. Chapters emphasize transport properties (TP) as a research tool at the micro/nano level and give an experimental view on underlying techniques. The relevance of TP is highlighted through the interplay between a micro/nanocarrier’s characteristics and media characteristics: long/short-range order and disorder excitations, couplings, and in energy conversions. Later sections contain case studies on the role of transport properties in functional nanomaterials. This includes transport in thin films and nanostructures, from nanogranular films, to graphene and 2D semiconductors and spintronics, and from read heads, MRAMs and sensors, to nano-oscillators and energy conversion, from figures of merit, micro-coolers and micro-heaters, to spincaloritronics. Presents a pragmatic description of electrical transport phenomena in micro- and nanoscale materials and devices from an experimental viewpoint Provides an in-depth overview of the experimental techniques available to measure transport phenomena in micro- and nanoscale materials Features case studies to illustrate how each technique works Highlights emerging areas of interest in micro- and nanomaterial transport phenomena, including spintronics

Download or read book Nanostructured Semiconductors written by Konstantinos Termentzidis and published by CRC Press. This book was released on 2017-09-01 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is devoted to nanostructures and nanostructured materials containing both amorphous and crystalline phases with a particular focus on their thermal properties. It is the first time that theoreticians and experimentalists from different domains gathered to treat this subject. It contains two distinct parts; the first combines theory and simulations methods with specific examples, while the second part discusses methods to fabricate nanomaterials with crystalline and amorphous phases and experimental techniques to measure the thermal conductivity of such materials. Physical insights are given in the first part of the book, related with the existing theoretical models and the state of art simulations methods (molecular dynamics, ab-initio simulations, kinetic theory of gases). In the second part, engineering advances in the nanofabrication of crystalline/amorphous heterostructures (heavy ion irradiation, electrochemical etching, aging/recrystallization, ball milling, PVD, laser crystallization and magnetron sputtering) and adequate experimental measurement methods are analyzed (Scanning Thermal Microscopy, Raman, thermal wave methods and x-rays neutrons spectroscopy).

Download or read book Nanoscale Phenomena written by Horst Hahn and published by Springer Science & Business Media. This book was released on 2009-09-18 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main intention of the editors of the book is the demonstration of the intrinsic correlation and mutual influence of three important components of nanoscience: new phenomena – nanomaterials – nanodevices. This is the organizing concept of the book. To discover new phenomena it is necessary to develop novel nanotechnological processes for fabrication of nanomaterials. Nanostructures and new phenomena serve as the base for the development of novel nanoelectronic devices and systems. The articles selected for the book illustrate this interrelation.

Download or read book Nanoscale Phenomena written by Zikang Tang and published by Springer Science & Business Media. This book was released on 2007-11-22 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects selected lectures from the Third Workshop of the Croucher Advanced Study Institute on Nano Science and Technology, and showcases contributions from world-renowned researchers. The book presents in-depth articles on the latest developments in nanomaterials and nanotechnology, and provides a cross-disciplinary perspective covering physics and biophysics, chemistry, materials science, and engineering.

Download or read book Thermal Nanosystems and Nanomaterials written by Sebastian Volz and published by Springer Science & Business Media. This book was released on 2009-12-24 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat transfer laws for conduction, radiation and convection change when the dimensions of the systems in question shrink. The altered behaviours can be used efficiently in energy conversion, respectively bio- and high-performance materials to control microelectronic devices. To understand and model those thermal mechanisms, specific metrologies have to be established. This book provides an overview of actual devices and materials involving micro-nanoscale heat transfer mechanisms. These are clearly explained and exemplified by a large spectrum of relevant physical models, while the most advanced nanoscale thermal metrologies are presented.

Download or read book Thermal Phenomena in Nanomaterials and Nanoscale Material Processing written by Zhen Huang and published by . This book was released on 2006 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nanoscale Thermoelectrics written by Xiaodong Wang and published by Springer Science & Business Media. This book was released on 2013-11-18 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the efficient utilization of energy resources and the minimization of environmental damage, thermoelectric materials can play an important role by converting waste heat into electricity directly. Nanostructured thermoelectric materials have received much attention recently due to the potential for enhanced properties associated with size effects and quantum confinement. Nanoscale Thermoelectrics describes the theory underlying these phenomena, as well as various thermoelectric materials and nanostructures such as carbon nanotubes, SiGe nanowires, and graphene nanoribbons. Chapters written by leading scientists throughout the world are intended to create a fundamental bridge between thermoelectrics and nanotechnology, and to stimulate readers' interest in developing new types of thermoelectric materials and devices for power generation and other applications. Nanoscale Thermoelectrics is both a comprehensive introduction to the field and a guide to further research, and can be recommended for Physics, Electrical Engineering, and Materials Science departments.

Download or read book Nano Science and Technology written by Ping Sheng and published by CRC Press. This book was released on 2003-03-06 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoscience and technology is a rapidly developing area of research in physics, chemistry, and materials. This volume comsists of papers presented at the Advanced Study Institute in Hong Kong that explore developments in novel structures in phenomena of nanostructured materials. The topics include: two-dimensional nanoclusters on met

Download or read book Transport Phenomena in Thermoelectric and Ferromagnetic Nanostructures written by Johannes Kimling and published by Cuvillier Verlag. This book was released on 2013-09-23 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on transport phenomena in a variety of materials has played a decisive role in the development of solidstate physics and has led to important applications of functional materials, e.g. for the conversion and storage of energy or in the fi eld of storage and processing of data. This thesis deals with transport phenomena in nanoscale systems. The Seebeck effect is explored in Bi2Te3 nanowires, the anisotropic magnetothermal resistance effect in Ni nanowires, and the giant magnetothermal resistance effect in Co/Cu multilayers.

Download or read book Nanostructured Materials for Engineering Applications written by Carlos P. Bergmann and published by Springer Science & Business Media. This book was released on 2011-08-28 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an introduction to nanostructured materials and guides the reader through their different engineering applications. It addresses the special phenomena and potentials involved in the applications without going into too much scientific detail of the physics and chemistry involved, which makes the reading interesting for beginners in the field. Materials for different applications in engineering are described, such as those used in opto-electronics, energy, tribology, bio-applications, catalysis, reinforcement and many more. In each application chapter, the reader will learn about the phenomena involved in the application, the nanostructured materials used in the field and their processing, besides finding some practical examples of their use in laboratories and in industry.The clear language and the application-oriented perspective of the book makes it suitable for both engineers and students who want to learn about applications of nanostructured materials in Engineering.

Download or read book Thermal Conductivity 30 written by Daniela S. Gaal and published by DEStech Publications, Inc. This book was released on 2010 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nano Microscale Heat Transfer written by Zhuomin M. Zhang and published by Springer Nature. This book was released on 2020-06-23 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt: This substantially updated and augmented second edition adds over 200 pages of text covering and an array of newer developments in nanoscale thermal transport. In Nano/Microscale Heat Transfer, 2nd edition, Dr. Zhang expands his classroom-proven text to incorporate thermal conductivity spectroscopy, time-domain and frequency-domain thermoreflectance techniques, quantum size effect on specific heat, coherent phonon, minimum thermal conductivity, interface thermal conductance, thermal interface materials, 2D sheet materials and their unique thermal properties, soft materials, first-principles simulation, hyperbolic metamaterials, magnetic polaritons, and new near-field radiation experiments and numerical simulations. Informed by over 12 years use, the author’s research experience, and feedback from teaching faculty, the book has been reorganized in many sections and enriched with more examples and homework problems. Solutions for selected problems are also available to qualified faculty via a password-protected website.• Substantially updates and augments the widely adopted original edition, adding over 200 pages and many new illustrations;• Incorporates student and faculty feedback from a decade of classroom use;• Elucidates concepts explained with many examples and illustrations;• Supports student application of theory with 300 homework problems;• Maximizes reader understanding of micro/nanoscale thermophysical properties and processes and how to apply them to thermal science and engineering;• Features MATLAB codes for working with size and temperature effects on thermal conductivity, specific heat of nanostructures, thin-film optics, RCWA, and near-field radiation.

Download or read book Thermoelectricity and Heat Transport in Graphene and Other 2D Nanomaterials written by Serhii Shafraniuk and published by Elsevier. This book was released on 2017-07-15 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoelectricity and Heat Transport in Graphene and Other 2D Nanomaterials describes thermoelectric phenomena and thermal transport in graphene and other 2-dimentional nanomaterials and devices. Graphene, which is an example of an atomic monolayered material, has become the most important growth area in materials science research, stimulating an interest in other atomic monolayeric materials. The book analyses flow management, measurement of the local temperature at the nanoscale level and thermoelectric transducers, with reference to both graphene and other 2D nanomaterials. The book covers in detail the mechanisms of thermoelectricity, thermal transport, interface phenomena, quantum dots, non-equilibrium states, scattering and dissipation, as well as coherent transport in low-dimensional junctions in graphene and its allotropes, transition metal dichalcogenides and boron nitride. This book aims to show readers how to improve thermoelectric transducer efficiency in graphene and other nanomaterials. The book describes basic ingredients of such activity, allowing readers to gain a greater understanding of fundamental issues related to the heat transport and the thermoelectric phenomena of nanomaterials. It contains a thorough analysis and comparison between theory and experiments, complemented with a variety of practical examples. Shows readers how to improve the efficiency of heat transfer in graphene and other nanomaterials with analysis of different methodologies Includes fundamental information on the thermoelectric properties of graphene and other atomic monolayers, providing a valuable reference source for materials scientists and engineers Covers the important models of thermoelectric phenomena and thermal transport in the 2D nanomaterials and nanodevices, allowing readers to gain a greater understanding of the factors behind the efficiency of heat transport in a variety of nanomaterials

Download or read book Nanostructured Materials Thin Films and Hard Coatings for Advanced Applications written by Lilyana Kolakieva and published by Trans Tech Publications Ltd. This book was released on 2010-01-26 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This special collection of peer-reviewed papers focuses on the technology, characterization and equipment required for handling nanocomposite films and hard and superhard coatings. It also covers subjects related to the development, properties and methods for the characterization of nanostructured materials for: solid-state electronics and energy technologies; nanocomposite films, hard and superhard coatings, tribological / corrosion-resistant coatings; surfaces and interfaces; nano-sensors, nanodevices and nanosystems, Equipment for deposition and characterization of nanocomposite films and industrial application of hard and superhard coatings.

Download or read book Low Dimensional and Nanostructured Materials and Devices written by Hilmi Ünlü and published by Springer. This book was released on 2015-12-01 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the fundamental phenomena at nanoscale. It covers synthesis, properties, characterization and computer modelling of nanomaterials, nanotechnologies, bionanotechnology, involving nanodevices. Further topics are imaging, measuring, modeling and manipulating of low dimensional matter at nanoscale. The topics covered in the book are of vital importance in a wide range of modern and emerging technologies employed or to be employed in most industries, communication, healthcare, energy, conservation , biology, medical science, food, environment, and education, and consequently have great impact on our society.