Thermal conductance of the junction between single-walled carbon nanotubes

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  • Lin Hu
    Carnegie Mellon University Department of Mechanical Engineering, , Pittsburgh, Pennsylvania 15213, USA
  • Alan J. H. McGaughey
    Carnegie Mellon University Department of Mechanical Engineering, , Pittsburgh, Pennsylvania 15213, USA

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<jats:p>The thermal conductances of the carbon nanotube (CNT) junctions that would be found in a CNT aerogel are predicted using molecular dynamics simulations. At a temperature of 300 K, the thermal conductance of a perpendicular junction converges to 40 pW/K as the CNT lengths approach 100 nm. The key geometric parameter affecting the thermal conductance is the angle formed by the two CNTs. At pressures above 1 bar, the presence of a surrounding gas leads to an effective increase in the junction thermal conductance by providing a parallel path for energy flow.</jats:p>

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