Thermal rectifiers from deformed carbon nanohorns
Thermal rectifiers from deformed carbon nanohorns
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DOI：
10.1088/0953-8984/20/17/175211
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发表时间：
2008-04
期刊：
影响因子：
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通讯作者：
Gangshan Wu;Baowen Li
中科院分区：
文献类型：
--
作者：
Gangshan Wu;Baowen Li
利用非平衡态分子动力学方法研究了单壁碳纳米角（SWNHs）的热整流行为。结果表明，顶角越大的喇叭，由于结构梯度分布越大，其非对称传热越明显。这种梯度行为可以通过在SWNH上施加外部应变来进一步调节。在沿轴向沿着仔细拉伸后，拉伸的SWNH中的热整流可以变得比未变形的SWNH中的热整流更明显。单壁碳纳米管的最大整流效率远大于碳纳米管分子内结。
We study thermal rectification in single-walled carbon nanohorns (SWNHs) by using a 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, thermal rectification in the elongated SWNHs can become more obvious than that in undeformed SWNHs. The maximum rectification efficiency of SWNHs is much bigger than that of carbon nanotube intramolecular junctions.