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Author: Laurent J. Majerus Publisher: ISBN: Category : Carbon fibers Languages : en Pages : 100
Book Description
Developments in modern electronics are hindered by smaller devices creating more heat without better cooling methods. Better heat dissipating materials are sought to lower operating temperatures, and an increasing number of micro and nanostructures are being developed for such use. Testing these one dimensional structures is difficult due to their microscopic scale, so a new method is developed for measuring the thermal properties of high thermal diffusivity micro and nanofibers. This method builds upon previous techniques to remove inaccuracies and unnecessary complications. The result is the thermal flash technique used here to measure the thermal properties of a variety of carbon based structures, focusing on a fiber composed of polyimide and coal tar pitch developed at the University of Akron. An investigation into the thermal properties of these fibers as a function of pitch is presented, and the results compare within +/- 5% to reported values in the literature.
Author: Laurent J. Majerus Publisher: ISBN: Category : Carbon fibers Languages : en Pages : 100
Book Description
Developments in modern electronics are hindered by smaller devices creating more heat without better cooling methods. Better heat dissipating materials are sought to lower operating temperatures, and an increasing number of micro and nanostructures are being developed for such use. Testing these one dimensional structures is difficult due to their microscopic scale, so a new method is developed for measuring the thermal properties of high thermal diffusivity micro and nanofibers. This method builds upon previous techniques to remove inaccuracies and unnecessary complications. The result is the thermal flash technique used here to measure the thermal properties of a variety of carbon based structures, focusing on a fiber composed of polyimide and coal tar pitch developed at the University of Akron. An investigation into the thermal properties of these fibers as a function of pitch is presented, and the results compare within +/- 5% to reported values in the literature.
Author: Lin Qiu Publisher: Academic Press ISBN: 012823623X Category : Science Languages : en Pages : 358
Book Description
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
Author: Management Association, Information Resources Publisher: IGI Global ISBN: 1799887367 Category : Technology & Engineering Languages : en Pages : 1917
Book Description
The use of nanotechnologies continues to grow, as nanomaterials have proven their versatility and use in many different fields and industries within the scientific profession. Using nanotechnology, materials can be made lighter, more durable, more reactive, and more efficient leading nanoscale materials to enhance many everyday products and processes. With many different sizes, shapes, and internal structures, the applications are endless. These uses range from pharmaceutics to materials such as cement or cloth, electronics, environmental sustainability, and more. Therefore, there has been a recent surge of research focused on the synthesis and characterizations of these nanomaterials to better understand how they can be used, their applications, and the many different types. The Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials seeks to address not only how nanomaterials are created, used, or characterized, but also to apply this knowledge to the multidimensional industries, fields, and applications of nanomaterials and nanoscience. This includes topics such as both natural and manmade nanomaterials; the size, shape, reactivity, and other essential characteristics of nanomaterials; challenges and potential effects of using nanomaterials; and the advantages of nanomaterials with multidisciplinary uses. This book is ideally designed for researchers, engineers, practitioners, industrialists, educators, strategists, policymakers, scientists, and students working in fields that include materials engineering, engineering science, nanotechnology, biotechnology, microbiology, drug design and delivery, medicine, and more.
Author: Vivek Kumar Goyal Publisher: ISBN: Category : Graphene Languages : en Pages : 170
Book Description
Continuous downscaling of Si complementary metal-oxide semiconductor (CMOS) technology and progress in high-power electronics demand more efficient heat removal techniques to handle the increasing power density and rising temperature of hot spots. For this reason, it is important to investigate thermal properties of materials at nanometer scale and identify materials with the extremely large or extremely low thermal conductivity for applications as heat spreaders or heat insulators in the next generation of integrated circuits. The thin films used in microelectronic and photonic devices need to have high thermal conductivity in order to transfer the dissipated power to heat sinks more effectively. On the other hand, thermoelectric devices call for materials or structures with low thermal conductivity because the performance of thermoelectric devices is determined by the figure of merit Z=S 2 [sigma]/ K, where S is the Seebeck coefficient, K and [sigma] are the thermal and electrical conductivity, respectively. Nanostructured superlattices can have drastically reduced thermal conductivity as compared to their bulk counterparts making them promising candidates for high-efficiency thermoelectric materials. Other applications calling for thin films with low thermal conductivity value are high-temperature coatings for engines. Thus, materials with both high thermal conductivity and low thermal conductivity are technologically important. The increasing temperature of the hot spots in state-of-the-art chips stimulates the search for innovative methods for heat removal. One promising approach is to incorporate materials, which have high thermal conductivity into the chip design. Two suitable candidates for such applications are diamond and graphene. Another approach is to integrate the high-efficiency thermoelectric elements for on-spot cooling. In addition, there is strong motivation for improved thermal interface materials (TIMs) for heat transfer from the heat-generating chip to heat-sinking units. This dissertation presents results of the experimental investigation and theoretical interpretation of thermal transport in the advanced engineered materials, which include thin films for thermal management of nanoscale devices, nanostructured superlattices as promising candidates for high-efficiency thermoelectric materials, and improved TIMs with graphene and metal particles as fillers providing enhanced thermal conductivity. The advanced engineered materials studied include chemical vapor deposition (CVD) grown ultrananocrystalline diamond (UNCD) and microcrystalline diamond (MCD) films on Si substrates, directly integrated nanocrystalline diamond (NCD) films on GaN, free-standing polycrystalline graphene (PCG) films, graphene oxide (GOx) films, and "pseudo-superlattices" of the mechanically exfoliated Bi 2 Te 3 topological insulator films, and thermal interface materials (TIMs) with graphene fillers.
Author: Khalid Muzaffar Publisher: ISBN: 9783668976047 Category : Languages : en Pages : 136
Book Description
Document from the year 2014 in the subject Engineering - General, Basics, grade: A, Indian Institute of Technology, Delhi, language: English, abstract: This book documents the efforts towards thermal characterization of templated nanostructures using an infrared (IR) thermography based non-contact technique. One dimensional bismuth telluride Bi2Te3 nanostructures were grown using anodic alumina (AAO) template assisted electrodeposition technique. An infrared thermography based technique was then developed for the in-plane thermal diffusivity measurements of these templated nanocomposites. The thermal diffusivity of the nanowires alone was estimated through comparing the experimental results with the predictions made by a first order lower bound model (FOLBM). A mathematical background of the proposed technique with simulation studies is also reported. Infrared thermography techniques are widely used for non destructive testing (NDT) and evaluation. The application areas are greatly varied: from water entrapment and moisture evaluation of buildings, degradation of EPROM (erasable programmable read only memory) chips and printed circuit boards, defect detection and characterization in turbine blades, medical and veterinary applications such as thermal coronary angiography, humane breast tumors, neuromuscular disorders, public services as forest fire detection and monitoring of traffic roads, to name a few.
Author: Michelle Yuen-ting Wu Publisher: ISBN: Category : Languages : en Pages : 35
Book Description
Nanoscale ionic materials (NIMS) are a hybrid organic-inorganic liquid-like material consisting of a hard inorganic nanocore and an organic canopy. The high nanoparticle content, zero vapor pressure and inexpensive mass production capabilities give NIMS the ability to develop into sustainable metamaterials that outperform traditional nanofluids in cost and efficiency. Current heat transfer materials are limited by nanoparticle saturation. NIMS, with their superior nanoparticle concentration and stability, may be a more effective and environmentally friendly substitution for these products. Investigation of this requires a reliable method of determining the thermal diffusivity of NIMS. The laser flash analysis (LFA) method of experimentally determining the thermal properties of nanofluids was applied to NIMS of varying compositions at room temperature. Despite promising preliminary results, LFA is not yet a reliable method of characterizing the thermal properties of NIMS. In spite of obstacles in experimental measurement, LFA still appears to be the most viable method for thermal measurement of NIMS. Further improvements to experimental techniques may lead to standardization of thermal diffusivity of NIMS.
Author: Siqi Ding Publisher: Springer Nature ISBN: 9819923069 Category : Technology & Engineering Languages : en Pages : 311
Book Description
The subject of this book is civil engineering material and nanotechnology. Recent advances in nano-synthetic technologies and nanocomposite technologies as well as nano-surface modification technologies are driving the progressive exploitation of advanced nanomaterials. In view of their unique structures and mutual synergy, these advanced nanomaterials are expected to alleviate the dispersion issue of traditional nanomaterials in cement-based composites, improve their nanocomposite effectiveness and efficiency as well as impart new properties and functionalities to cement-based composites, thus boosting the development of new-generation cement-based nanocomposites. Based on the authors’ latest research accumulations and achievements, this book presents the fundamentals, fabrications, characterizations, performances and applications of the new-generation cement-based nanocomposites. It features numerous illustrations and data graphs as well as summary tables to visually describe the topics. This book is dedicated to students, researchers, scientists and engineers in the field of civil engineering materials and nanotechnology. The readers can find information on progress of civil engineering materials and nanotechnologies, cutting-edge research ideas and findings and practical guidance for developing sustainable and multifunctional cement-based nanocomposites.
Author: John C Bischof Publisher: World Scientific ISBN: 9814733202 Category : Technology & Engineering Languages : en Pages : 389
Book Description
The use of micro / nanotechnology in cell and tissue engineering, and especially for cell and tissue preservation, is at the peak of its activity now, with scientific output expected to continue growing in the coming years.Micro and nanotechnologies have induced paradigm shifts in many scientific fields, and as featured in this edited volume, they are having important impact in the field of cryomedicine. The book gives an overview of the recent progress in implementing multiscale (micro and nanoscale) technologies to improve the outcome of various cryomedical applications including cryosurgery, cryopreservation, lyopreservation and to understand the fundamental engineering and science underpinning the applications.This is the first book that will provide both an introductory and in-depth account of applying the multiscale technologies in cryomedicine.
Author: Laurent J. Majerus
Author: Laurent J. Majerus
Author: Lin Qiu
Author: Management Association, Information Resources
Author: Vivek Kumar Goyal
Author: Khalid Muzaffar
Author: Manuela Musella
Author: Michelle Yuen-ting Wu
Author: 
Author: Siqi Ding
Author: John C Bischof