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Measurement of Quasi-ballistic Heat Transport Across Nanoscale Interfaces Using Ultrafast Coherent Soft X-ray Beams

2009
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Release : 2009
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Kind : eBook
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Book Synopsis Measurement of Quasi-ballistic Heat Transport Across Nanoscale Interfaces Using Ultrafast Coherent Soft X-ray Beams by :

Download or read book Measurement of Quasi-ballistic Heat Transport Across Nanoscale Interfaces Using Ultrafast Coherent Soft X-ray Beams written by . This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt: Understanding heat transport on nanoscale dimensions is important for fundamental advances in nanoscience, as well as for practical applications such as thermal management in nano-electronics, thermoelectric devices, photovoltaics, nanomanufacturing, as well as nanoparticle thermal therapy. Here we report the first time-resolved measurements of heat transport across nanostructured interfaces. We observe the transition from a diffusive to a ballistic thermal transport regime, with a corresponding increase in the interface resistivity for line widths smaller than the phonon mean free path in the substrate. Resistivities more than three times higher than the bulk value are measured for the smallest line widths of 65 nm. Our findings are relevant to the modeling and design of heat transport in nanoscale engineered systems, including nanoelectronics, photovoltaics and thermoelectric devices.

Nano/Microscale Heat Transfer

2020-06-23 Science
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Release : 2020-06-23
Genre : Science
Kind : eBook
Book Rating : 392/5 ( reviews)

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Book Synopsis Nano/Microscale Heat Transfer by : Zhuomin M. Zhang

Download or read book Nano/Microscale Heat Transfer written by Zhuomin M. Zhang. This book was released on 2020-06-23. 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.

Thermal Transport in Semiconductors

2018-06-28 Technology & Engineering
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Release : 2018-06-28
Genre : Technology & Engineering
Kind : eBook
Book Rating : 837/5 ( reviews)

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Book Synopsis Thermal Transport in Semiconductors by : Pol Torres Alvarez

Download or read book Thermal Transport in Semiconductors written by Pol Torres Alvarez. This book was released on 2018-06-28. Available in PDF, EPUB and Kindle. Book excerpt: Starting from a broad overview of heat transport based on the Boltzmann Transport Equation, this book presents a comprehensive analysis of heat transport in bulk and nanomaterials based on a kinetic-collective model (KCM). This has become key to understanding the field of thermal transport in semiconductors, and represents an important stride. The book describes how heat transport becomes hydrodynamic at the nanoscale, propagating very much like a viscous fluid and manifesting vorticity and friction-like behavior. It introduces a generalization of Fourier’s law including a hydrodynamic term based on collective behavior in the phonon ensemble. This approach makes it possible to describe in a unifying way recent experiments that had to resort to unphysical assumptions in order to uphold the validity of Fourier’s law, demonstrating that hydrodynamic heat transport is a pervasive type of behavior in semiconductors at reduced scales.

21st Century Nanoscience – A Handbook

2019-11-21 Science
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Release : 2019-11-21
Genre : Science
Kind : eBook
Book Rating : 429/5 ( reviews)

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Book Synopsis 21st Century Nanoscience – A Handbook by : Klaus D. Sattler

Download or read book 21st Century Nanoscience – A Handbook written by Klaus D. Sattler. This book was released on 2019-11-21. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date reference is the most comprehensive summary of the field of nanoscience and its applications. It begins with fundamental properties at the nanoscale and then goes well beyond into the practical aspects of the design, synthesis, and use of nanomaterials in various industries. It emphasizes the vast strides made in the field over the past decade – the chapters focus on new, promising directions as well as emerging theoretical and experimental methods. The contents incorporate experimental data and graphs where appropriate, as well as supporting tables and figures with a tutorial approach.

Thermal Energy

2018-01-12 Technology & Engineering
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Release : 2018-01-12
Genre : Technology & Engineering
Kind : eBook
Book Rating : 941/5 ( reviews)

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Book Synopsis Thermal Energy by : Yatish T. Shah

Download or read book Thermal Energy written by Yatish T. Shah. This book was released on 2018-01-12. Available in PDF, EPUB and Kindle. Book excerpt: The book details sources of thermal energy, methods of capture, and applications. It describes the basics of thermal energy, including measuring thermal energy, laws of thermodynamics that govern its use and transformation, modes of thermal energy, conventional processes, devices and materials, and the methods by which it is transferred. It covers 8 sources of thermal energy: combustion, fusion (solar) fission (nuclear), geothermal, microwave, plasma, waste heat, and thermal energy storage. In each case, the methods of production and capture and its uses are described in detail. It also discusses novel processes and devices used to improve transfer and transformation processes.

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