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    American Institute of Physics (AIP)
    Publication Date: 2014-02-08
    Description: Due to the high intrinsic thermal conductivity, carbon nanotubes are very promising to serve as effective thermal interface materials for microelectronics or other cooling applications. However, the performance of carbon nanotube based thermal interface material is strongly limited by the small effective contact area and weak bonding at carbon nanotube and material interface. Here, we propose a junction structure that the carbon nanotube is bonded with a monolayer graphene, which could potentially enhance the interface thermal conductance. Molecular dynamics simulations show that the interface thermal conductance can be enhanced by at least 40% compared to direct carbon nanotube and silicon interface with strong covalent bonding, while for weak van der Waals bonding the conductance can be enhanced by almost one order of magnitude. The enhancement of thermal conductance is attributed to the efficient thermal transport between carbon nanotube and graphene, as well as the good contact between graphene and silicon surface.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
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