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Fabrication of thermally-conductive carbon nanotubes-copper oxide heterostructures

机译：导热碳纳米管 - 氧化铜异质结构的制备

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A complete dry processing route is developed for the fabrication of thermally-conductive carbon nanotube (CNT)-copper oxide (CuO_x) heterostructures. This was achieved by the deposition of copper (Cu) onto CNTs and subsequent annealing in Ar and air environment to convert the coated Cu into CuO_x nanoparticles. The survivability and diameters of CNTs were studied to ensure their integrity after the multiple processing steps and annealing temperatures (400 °C). The as-produced CNTs, air/Ar-annealed CNTs, Cu-coated CNTs, and CNT-CuO_x heterostructures were characterized to study their structure, phase, and morphology using microscopy, elemental analysis, X-ray diffraction, and sheet resistance. It was observed that CNTs could survive the processing conditions and became coated with CuO_x nanoparticles. The sheet resistance of CNTs coated with CuO_x nanoparticles was ～4 times greater than the as-produced CNTs. The Raman spectroscopy-based estimation of thermal conductivity of CNTs and CNT-CuO_x heterostructures showed 2-7 times enhancement for the latter as compared to pure CuO_x. In conclusion, such hybrid CNT-based heterostructures are promising for applications in thermal management.
机译：一个完整的干燥处理路由是导热碳纳米管的制造（CNT） - 铜氧化物（CuO_x）异质结构的发展。这是由铜（Cu）的碳纳米管上沉积和随后的退火中Ar和空气环境到涂覆的铜转化为纳米颗粒CuO_x实现。 CNT的生存能力和直径进行了研究，以确保后的多个处理步骤和退火温度（400℃）其完整性。如此生产的CNT，空气/氩退火的CNT，铜涂覆的CNT，和CNT-CuO_x异质结构进行了表征，研究它们的结构，相位，并使用显微镜，元素分析，X射线衍射，和薄层电阻的形态。据观察，碳纳米管能够生存的加工条件并成为涂覆有CuO_x纳米颗粒。涂覆有纳米颗粒CuO_x CNT的薄层电阻比现制备的CNT更大〜4倍。 CNT和CNT-CuO_x异质结构的热导率的拉曼基于光谱的估计显示2-7倍的增强，后者相比于纯CuO_x。总之，基于CNT的这种混合异质结构是有希望的热管理应用。

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