Thermal rectifier from deformed carbon nanohorns

Details Thermal rectifier from deformed carbon nanohorns Thermal rectifier from deformed carbon nanohorns

2008-05-02

arxiv.org/abs/0805.0322v1

J. Phys.: Condens. Matter 20 (2008) 175211

Physics

Condensed Matter

Materials Science

3 figures

Scientific paper

10.1088/0953-8984/20/17/175211

We study thermal rectification in single-walled carbon nanohorns (SWNHs) by using non-equilibrium molecular dynamics (MD) method. It is found that the horns with the bigger top angles show larger asymmetric heat transport due to the larger structural gradient distribution. This kind of gradient behavior can be further adjusted by applying external strain on the SWNHs. After being carefully elongated along the axial direction, the thermal rectification in the elongated SWNHs can become more obvious than that in undeformed ones. The maximum rectification efficiency of SWNHs is much bigger than that of carbon nanotube intramolecular junctions.

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