The Experts below are selected from a list of 288837 Experts worldwide ranked by ideXlab platform
Alexander A Balandin - One of the best experts on this subject based on the ideXlab platform.
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Thermal properties of graphene and nanostructured Carbon Materials
Nature Materials, 2011Co-Authors: Alexander A BalandinAbstract:Recent years have seen a rapid growth of interest by the scientific and engineering communities in the thermal properties of Materials. Heat removal has become a crucial issue for continuing progress in the electronic industry, and thermal conduction in low-dimensional structures has revealed truly intriguing features. Carbon allotropes and their derivatives occupy a unique place in terms of their ability to conduct heat. The room-temperature thermal conductivity of Carbon Materials span an extraordinary large range — of over five orders of magnitude — from the lowest in amorphous Carbons to the highest in graphene and Carbon nanotubes. Here, I review the thermal properties of Carbon Materials focusing on recent results for graphene, Carbon nanotubes and nanostructured Carbon Materials with different degrees of disorder. Special attention is given to the unusual size dependence of heat conduction in two-dimensional crystals and, specifically, in graphene. I also describe the prospects of applications of graphene and Carbon Materials for thermal management of electronics. The thermal properties of nanostructures have become a fundamental topic owing to the necessity of heat removal in increasingly smaller electronic devices. Carbon allotropes present a range of intriguing thermal features, with the thermal conductivity spanning five orders of magnitude at room temperature. The topic is reviewed here with particular emphasis on graphene, which exhibits the highest thermal conductivity observed.
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thermal properties of graphene Carbon nanotubes and nanostructured Carbon Materials
arXiv: Materials Science, 2011Co-Authors: Alexander A BalandinAbstract:Recent years witnessed a rapid growth of interest of scientific and engineering communities to thermal properties of Materials. Carbon allotropes and derivatives occupy a unique place in terms of their ability to conduct heat. The room-temperature thermal conductivity of Carbon Materials span an extraordinary large range – of over five orders of magnitude – from the lowest in amorphous Carbons to the highest in graphene and Carbon nanotubes. I review thermal and thermoelectric properties of Carbon Materials focusing on recent results for graphene, Carbon nanotubes and nanostructured Carbon Materials with different degrees of disorder. A special attention is given to the unusual size dependence of heat conduction in two-dimensional crystals and, specifically, in graphene. I also describe prospects of applications of graphene and Carbon Materials for thermal management of electronics.
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Thermal properties of graphene and nanostructured Carbon Materials.
Nat. Mater., 2011Co-Authors: Alexander A BalandinAbstract:Recent years have seen a rapid growth of interest by the scientific and engineering communities in the thermal properties of Materials. Heat removal has become a crucial issue for continuing progress in the electronic industry, and thermal conduction in low-dimensional structures has revealed truly intriguing features. Carbon allotropes and their derivatives occupy a unique place in terms of their ability to conduct heat. The room-temperature thermal conductivity of Carbon Materials span an extraordinary large range - of over five orders of magnitude - from the lowest in amorphous Carbons to the highest in graphene and Carbon nanotubes. Here, I review the thermal properties of Carbon Materials focusing on recent results for graphene, Carbon nanotubes and nanostructured Carbon Materials with different degrees of disorder. Special attention is given to the unusual size dependence of heat conduction in two-dimensional crystals and, specifically, in graphene. I also describe the prospects of applications of graphene and Carbon Materials for thermal management of electronics.
Taeghwan Hyeon - One of the best experts on this subject based on the ideXlab platform.
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recent progress in the synthesis of porous Carbon Materials
Advanced Materials, 2006Co-Authors: Taeghwan HyeonAbstract:In this review, the progress made in the last ten years concerning the synthesis of porous Carbon Materials is summarized. Porous Carbon Materials with various pore sizes and pore structures have been synthesized using several different routes. Microporous activated Carbons have been synthesized through the activation process. Ordered microporous Carbon Materials have been synthesized using zeolites as templates. Mesoporous Carbons with a disordered pore structure have been synthesized using various methods, including catalytic activation using metal species, Carbonization of polymer/polymer blends, Carbonization of organic aerogels, and template synthesis using silica nanoparticles. Ordered mesoporous Carbons with various pore structures have been synthesized using mesoporous silica Materials such as MCM-48, HMS, SBA-15, MCF, and MSU-X as templates. Ordered mesoporous Carbons with graphitic pore walls have been synthesized using soft-Carbon sources that can be converted to highly ordered graphite at high temperature. Hierarchically ordered mesoporous Carbon Materials have been synthesized using various designed silica templates. Some of these mesoporous Carbon Materials have successfully been used as adsorbents for bulky pollutants, as electrodes for supercapacitors and fuel cells, and as hosts for enzyme immobilization. Ordered macroporous Carbon Materials have been synthesized using colloidal crystals as templates. One-dimensional Carbon nanostructured Materials have been fabricated using anodic aluminum oxide (AAO) as a template.
Nejat T Veziroglu - One of the best experts on this subject based on the ideXlab platform.
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storage of hydrogen in nanostructured Carbon Materials
International Journal of Hydrogen Energy, 2009Co-Authors: Yuda Yurum, Alpay Taralp, Nejat T VezirogluAbstract:Abstract Recent developments focusing on novel hydrogen storage media have helped to benchmark nanostructured Carbon Materials as one of the ongoing strategic research areas in science and technology. In particular, certain microporous Carbon powders, Carbon nanoMaterials, and specifically Carbon nanotubes stand to deliver unparalleled performance as the next generation of base Materials for storing hydrogen. Accordingly, the main goal of this report is to overview the challenges, distinguishing traits, and apparent contradictions of Carbon-based hydrogen storage technologies and to emphasize recently developed nanostructured Carbon Materials that show potential to store hydrogen by physisorption and/or chemisorption mechanisms. Specifically touched upon are newer material preparation methods as well as experimental and theoretical attempts to elucidate, improve or predict hydrogen storage capacities, sorption–desorption kinetics, microscopic uptake mechanisms and temperature–pressure–loading interrelations in nanostructured Carbons, particularly microporous powders and Carbon nanotubes.
Yuda Yurum - One of the best experts on this subject based on the ideXlab platform.
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storage of hydrogen in nanostructured Carbon Materials
International Journal of Hydrogen Energy, 2009Co-Authors: Yuda Yurum, Alpay Taralp, Nejat T VezirogluAbstract:Abstract Recent developments focusing on novel hydrogen storage media have helped to benchmark nanostructured Carbon Materials as one of the ongoing strategic research areas in science and technology. In particular, certain microporous Carbon powders, Carbon nanoMaterials, and specifically Carbon nanotubes stand to deliver unparalleled performance as the next generation of base Materials for storing hydrogen. Accordingly, the main goal of this report is to overview the challenges, distinguishing traits, and apparent contradictions of Carbon-based hydrogen storage technologies and to emphasize recently developed nanostructured Carbon Materials that show potential to store hydrogen by physisorption and/or chemisorption mechanisms. Specifically touched upon are newer material preparation methods as well as experimental and theoretical attempts to elucidate, improve or predict hydrogen storage capacities, sorption–desorption kinetics, microscopic uptake mechanisms and temperature–pressure–loading interrelations in nanostructured Carbons, particularly microporous powders and Carbon nanotubes.
Yusheng Yang - One of the best experts on this subject based on the ideXlab platform.
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lithium storage in nitrogen rich mesoporous Carbon Materials
Energy and Environmental Science, 2012Co-Authors: Ya Mao, Hui Duan, Lin Zhang, Changchun Zhao, Zhaoxiang Wang, Liquan Chen, Yusheng YangAbstract:Nitrogen-rich mesoporous Carbon Materials were obtained by pyrolyzing gelatin between 700 and 900 °C with a nano-CaCO3 template. The mesoporous structure and the high nitrogen content endowed these Materials with reversible capacities up to ca. 1200 mA h g−1. The high specific surface area and the nitrogen doping are responsible for the capacity loss in the initial cycle. FTIR and XPS studies indicate that the nitrogen in the material exists in the form of pyridinic, pyrrolic/pyridonic and graphitic nitrogen. The Raman spectroscopic analysis indicates that the structure of the mesoporous Carbon becomes more disordered during discharge and is restored during recharge, a behavior similar to that in nitrogen-free hard Carbon Materials. The reversible structural variation of these Carbon Materials ensures their high cyclic reversibility.