Heat Transfer in Low Dimensional Materials Characterized by Micro/Nanoscae Thermometry - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Heat Transfer in Low Dimensional Materials Characterized by Micro/Nanoscae Thermometry write by Jae Young Jeong. This book was released on 2018. Heat Transfer in Low Dimensional Materials Characterized by Micro/Nanoscae Thermometry available in PDF, EPUB and Kindle. In this study, the thermal properties of low dimensional materials such as graphene and boron nitride nanotube were investigated. As one of important heat transfer characteristics, interfacial thermal resistance (ITR) between graphene and Cu film was estimated by both experiment and simulation. In order to characterize ITR, the micropipette sensing technique was utilized to measure the temperature profile of suspended and supported graphene on Cu substrate that is subjected to continuous wave laser as a point source heating. By measuring the temperature of suspended graphene, the intrinsic thermal conductivity of suspended graphene was measured and it was used for estimating interfacial thermal resistance between graphene and Cu film. For simulation, a finite element method and a multiparameter fitting technique were employed to find the best fitting parameters. A temperature profile on a supported graphene on Cu was extracted by a finite element method using COMSOL Multiphysics. Then, a multiparameter fitting method using MATLAB software was used to find the best fitting parameters and ITR by comparing experimentally measured temperature profile with simulation one. In order to understand thermal transport between graphene and Cu substrate with different interface distances, the phonon density of states at the interface between graphene and Cu substrate was calculated by MD simulation.As another low dimensional material for thermal management applications, the thermal conductivity of BNNT was measured by nanoscale thermometry. For this work, a noble technique combining a focused ion beam (FIB) and nanomanipulator was employed to pick and to place a single BNNT on the desired location. The FIB technology was used to make nanoheater patterns (so called nanothermometer) on a prefabricated microelectrode device by conventional photolithography processes. With this noble technique and the nanoheater thermometry, the thermal conductivity of BNNT was successfully characterized by temperature gradient and heat flow measurements through BNNT.
Micro and Nano Thermal Transport
Micro and Nano Thermal Transport - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Micro and Nano Thermal Transport write by Lin Qiu. This book was released on 2022-02-09. Micro and Nano Thermal Transport available in PDF, EPUB and Kindle. Micro and Nano Thermal Transport Research: Characterization, Measurement and Mechanism is a complete and reliable reference on thermal measurement methods and mechanisms of micro and nanoscale materials. The book has a strong focus on applications and simulation, providing clear guidance on how to measure thermal properties in a systematic way. Sections cover the fundamentals of thermal properties before introducing tools to help readers identify and analyze thermal characteristics of these materials. The thermal transport properties are then further explored by means of simulation which reflect the internal mechanisms used to generate such thermal properties. Readers will gain a clear understanding of thermophysical measurement methods and the representative thermal transport characteristics of micro/nanoscale materials with different structures and are guided through a decision-making process to choose the most effective method to master thermal analysis. The book is particularly suitable for those engaged in the design and development of thermal property measurement instruments, as well as researchers of thermal transport at the micro and nanoscale. Includes a variety of measurement methods and thermal transport characteristics of micro and nanoscale materials under different structures Guides the reader through the decision-making process to ensure the best thermal analysis method is selected for their setting Contains experiments and simulations throughout that help apply understanding to practice
Characterization of Heat Transfer Coefficient at Micro/nano Scale and the Effect of Heated Zone Size
Characterization of Heat Transfer Coefficient at Micro/nano Scale and the Effect of Heated Zone Size - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Characterization of Heat Transfer Coefficient at Micro/nano Scale and the Effect of Heated Zone Size write by Raghu Pulavarthy. This book was released on 2015. Characterization of Heat Transfer Coefficient at Micro/nano Scale and the Effect of Heated Zone Size available in PDF, EPUB and Kindle. Heat transfer mechanism from hot solids to surrounding air is crucial in thermal systems. Thermal management of devices at micro/nano length scales is very important for their reliability as they continue to shrink in size. It is agreed widely that the heat transfer coefficient increases at smaller length scales. This work presents an experimental technique to characterize the heat transfer from micro and nano scale structures using infrared microscopy. The heat transfer coefficient is found to be two orders of magnitude higher than the value at bulk length scales. It also shows an inverse relationship with temperature of the solid which suggests that the solid to air conduction is the dominating mechanism of heat dissipation at small length scales. An empirical relationship is also presented that depends on ratio of surface area to cross-sectional area, temperature differential in the heated solid and its surroundings. The heat transfer coefficient in conjunction with the temperature map from the infrared microscope can be used to measure the thermal conductivity of specimen using a heat transfer model based on micro fin geometry. It is assumed that this size effect on the heat transfer coefficient is due to the size of specimen. An experiment is presented to show the effect of the predominance of the heater size on the heat transfer coefficient. For micro-heaters, the heat transfer coefficient is measured to about 3200 W/m2 K. This value drops to about 110 W/m2 K for a millimeter scale heater and to 10 W/m2 K for a macroscopic heater; all for a nanoscale thin film specimen.
21st Century Nanoscience
21st Century Nanoscience - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook 21st Century Nanoscience write by Klaus D. Sattler. This book was released on 2022-01-18. 21st Century Nanoscience available in PDF, EPUB and Kindle. This 21st Century Nanoscience Handbook will be the most comprehensive, up-to-date large reference work for the field of nanoscience. Handbook of Nanophysics, by the same editor, published in the fall of 2010, was embraced as the first comprehensive reference to consider both fundamental and applied aspects of nanophysics. This follow-up project has been conceived as a necessary expansion and full update that considers the significant advances made in the field since 2010. It goes well beyond the physics as warranted by recent developments in the field. Key Features: Provides the most comprehensive, up-to-date large reference work for the field. Chapters written by international experts in the field. Emphasises presentation and real results and applications. This handbook distinguishes itself from other works by its breadth of coverage, readability and timely topics. The intended readership is very broad, from students and instructors to engineers, physicists, chemists, biologists, biomedical researchers, industry professionals, governmental scientists, and others whose work is impacted by nanotechnology. It will be an indispensable resource in academic, government, and industry libraries worldwide. The fields impacted by nanoscience extend from materials science and engineering to biotechnology, biomedical engineering, medicine, electrical engineering, pharmaceutical science, computer technology, aerospace engineering, mechanical engineering, food science, and beyond.
Microscale and Nanoscale Heat Transfer
Microscale and Nanoscale Heat Transfer - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Microscale and Nanoscale Heat Transfer write by C.B. Sobhan. This book was released on 2008-06-12. Microscale and Nanoscale Heat Transfer available in PDF, EPUB and Kindle. Through analyses, experimental results, and worked-out numerical examples, Microscale and Nanoscale Heat Transfer: Fundamentals and Engineering Applications explores the methods and observations of thermophysical phenomena in size-affected domains. Compiling the most relevant findings from the literature, along with results from their own re
