Development of nanoscale thermal exchanging devices is critical to thermal management in nanoscale. The spontaneous migration of polyethylene molecule sheathed inside single-walled carbon nanotube (SWCNT) are observed. And the multi-factor analysis of spontaneous migration about temperature, mass and potential barrier shows new features about motion mechanisms, and enriches the existing mass transport theory greatly. Here, based on this finding, we report a nano-heat pipe (NHP) composing of a SWCNT and a polyethylene molecule. Using molecular dynamics simulations, the heat exchanging coefficient can reach 450 WK−1 cm−2 at 500 K by NHP arrays with a quantity density of 7 × 1013 cm−2. This study will benefit the designs of NHP and other nanoscale mass transport devices.
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机译：纳米级热交换设备的开发对于纳米级热管理至关重要。观察到包覆在单壁碳纳米管（SWCNT）内的聚乙烯分子的自发迁移。关于温度，质量和势垒的自发迁移的多因素分析显示了运动机理的新特征，极大地丰富了现有的传质理论。在此，基于此发现，我们报告了由SWCNT和聚乙烯分子组成的纳米热管（NHP）。利用分子动力学模拟，通过密度为7×10 13的NHP阵列，在500 atK时热交换系数可以达到450 WK -1 cm −2 cm −2 。这项研究将有益于NHP和其他纳米级大规模运输设备的设计。
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