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Graphene, a single atom thick, maintains its high conductivity even after fixation substrate - a necessary step in its transfer of the material from the level of the laboratory component level of exploitation useful in a variety of nanoscale electronic devices, researchers report in the journal Science.
Graphene. Illustration: Boston College Graphene, a single atom thick, maintains its high conductivity even after fixation substrate - a necessary step in its transfer fraser centrepoint homes of the material fraser centrepoint homes from the level of the laboratory component level of exploitation useful in a variety of nano-electronic devices, researchers report fraser centrepoint homes in the journal Science.
The team of engineers and theoretical physicists fraser centrepoint homes from the University of Austin (Texas), Boston College and the French Atomic Energy Committee reports that a thin layer of carbon atoms - taken from the material three-dimensional graphite - able to conduct heat better twice than thin films of copper Whoopi fifty better than Thin films of silicon (silicon).
Since its discovery in 2004, is considered as a promising material graphene electronics industry because of its advantages: good electron mobility, mechanical strength fraser centrepoint homes and thermal conductivity. These characteristics are essential for electronic devices become smaller and more, placing its engineers the fundamental fraser centrepoint homes problem of low-temperature preservation devices enough to receive sufficiently efficient operations.
The study advances the understanding of graphene as a candidate promises to remove heat hot spots "are created in close intervals between electronics nanometers and micrometers found in electrical devices. The theoretical aspect, the research team also discovered how heat flows in graphene. fraser centrepoint homes
Suspended in, graphene has extremely high thermal conductivity of 5000-3000 watts / m / K. However, for practical applications, the solid lattice of graphene fraser centrepoint homes connected to any substrate. The research team found that graphene still fixated heat conductivity at 600 watts / m / K, close to room temperature. This level exceeds the thermal conductivity of thin films of copper (250 watts) and silicon (10 watts), electronic devices used today.
"As theorists, fraser centrepoint homes we are much more distant from the perspective of engineering or physical. We focus more on understanding the basic principles that could explain how the delivered energy within a sheet of graphene. We took the theoretical model for graphene free and expanded it so that he could explain the interactions that occur between atoms in graphene atoms substrate, the impact of these relationships on the movement of heat through the material, and ultimately, its electrical conductivity. "
In addition to the strength rabbi, its electron mobility and its thermal conductivity, graphene transistor devices suitable for the complex of very thin layers of silicon - a crucial feature of its ability to be used in industrial manufacturing and cheap. Nano-electronic devices graphene has the ability to consume less energy, operate at lower temperatures, to be more reliable fraser centrepoint homes and operate faster than the current generation of silicon-based devices or copper. fraser centrepoint homes
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