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With support, graphene still a superior thermal conductor
Date:4/8/2010

raction with the substrate, which interferes with the vibrational waves of graphene atoms as they bump against the adjacent substrate, according to co-author David Broido, a Boston College Professor of Physics.

The conclusion was drawn with the help of earlier theoretical models about heat transfer within suspended graphene, Broido said. Working with former BC graduate student Lucas Lindsay, now an instructor at Christopher Newport University, and Natalio Mingo of France's Commission for Atomic Energy, Broido re-examined the theoretical model devised to explain the performance of suspended graphene.

"As theorists, we're much more detached from the device or the engineering side. We're more focused on the fundamentals that explain how energy flows through a sheet graphene. We took our existing model for suspended graphene and expanded the theoretical model to describe this interaction that takes place between graphene and the substrate and the influence on the movement of heat through the material and, ultimately, it's thermal conductivity."

In addition to its superior strength, electron mobility and thermal conductivity, graphene is compatible with thin film silicon transistor devices, a crucial characteristic if the material is to be used in low-cost, mass production. Graphene nano-electronic devices have the potential to consume less energy, run cooler and more reliably, and operate faster than the current generation of silicon and copper devices.


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Contact: Ed Hayward
ed.hayward@bc.edu
617-552-4826
Boston College
Source:Eurekalert  

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