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Thermal conductivity of carbon nanotubes

机译:碳纳米管的导热系数

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摘要

As the sizes of electronic and mechanical devicesare decreased to the micron and nanometre level, it becomesparticularly important to predict the thermal transport propertiesof the components. Using molecular level theories, suchpredictions are particularly important for modelling nano-electronic devices where scaling laws may change substantiallyhit it is most difficult to accurately measure the properties.Hence, using the empirical bond order dependent force field, wehave studied here the thermal conductivity of nanotubes'dependence on structure, defects and vacancies. The anisotropiccharacter of the thermal conductivity of the graphite crystal isnaturally reflected in the carbon nanotubes. We found that thecarbon nanotubes have very high thermal conductivitycomparable to diamond crystal and in-plane graphite sheet. Inaddition, nanotube bundles show very similar properties aswhite crystal in which dramatic difference in thermalconductivities along different crystal axis.
机译:随着电子和机械设备的尺寸减小到微米和纳米水平,预测部件的热传递特性变得尤为重要。使用分子水平理论,这种预测对于缩放比例定律可能会发生重大变化的纳米电子器件建模尤为重要,因此最难准确测量其性能。因此,本文使用经验键序依赖性力场研究了纳米管的热导率'取决于结构,缺陷和空缺。石墨晶体的导热性的各向异性特征自然地反映在碳纳米管中。我们发现,碳纳米管具有与金刚石晶体和面内石墨片相当的高导热率。另外,纳米管束显示出与白色晶体非常相似的特性,其中沿着不同晶轴的热导率显着不同。

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