US invests in graphene heatsink
The University of California, Riverside have received a three-year, $360,000 grant from the US National Science Foundation to further study the thermal properties of graphene, which is expected to lead to new approaches for the removal of heat from advanced electronic and optoelectronic devices, said the University.
Professors Alexander Balandin, Roger Lake, and Ashok Mulchandani will co-operate on the project called: “Two-dimensional performance with three-dimensional capacity: Engineering the thermal properties of graphene.”
Graphene has amazing properties as a single atomic layer, some of which diminish steeply as more layers are added.
The researchers hope to retain high performance with many layers by twisting the stacking angles.
They will study the possibility of suppressing phonon coupling in twisted graphene layers, allowing for the transfer of large heat fluxes. The phonons are quanta of crystal lattice vibrations that carry heat in graphene.”
“In recent years, the attention of the research community was focused on the properties of twisted bilayer graphene – a form of graphene bilayers where atomic planes are rotated against each other by some angle,” said the University. “The objective of this grant is to investigate the effect of rotation angle on the thermal conductivity of twisted bilayer graphene.”Tags: ashok, bilayer, heat fluxes, lattice vibrations