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首页> 外文会议>Nanoscale thermoelectric materials: Thermal and electrical transport, and applications to solid-state cooling and power generation >Fabrication of thermally-conductive carbon nanotubes-copper oxide heterostructures
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Fabrication of thermally-conductive carbon nanotubes-copper oxide heterostructures

机译：导热碳纳米管-铜氧化物异质结构的制备

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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 CuC_x nanoparticles. The survivability and diameters of CNTs were studied to ensure their integrity after the multiple processing steps and annealing temperatures (400 ℃). 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：开发了用于制造导热碳纳米管（CNT）-铜氧化物（CuO_x）异质结构的完整干燥工艺路线。这是通过将铜（Cu）沉积到CNT上，然后在Ar和空气环境中进行退火以将涂覆的Cu转化为CuC_x纳米颗粒来实现的。研究了碳纳米管的生存能力和直径，以确保在多个加工步骤和退火温度（400℃）后它们的完整性。使用显微镜，元素分析，X射线衍射和薄层电阻对制成的CNT，空气/ Ar退火CNT，镀Cu的CNT和CNT-CuO_x异质结构进行表征，以研究其结构，相和形态。观察到CNT可以在加工条件下幸存并被CuO_x纳米颗粒覆盖。包覆有CuO_x纳米粒子的CNT的薄膜电阻约为所生产CNT的约4倍。基于拉曼光谱的碳纳米管和碳纳米管-CuO_x异质结构热导率估算显示，与纯CuO_x相比，后者的热导率提高了2-7倍。总之，这种基于CNT的杂化结构在热管理中很有应用前景。

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