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首页> 外文期刊>Nanotechnology >Thermal conductivity of a single Bi_(0.5)Sb_(1.5)Te_3 single-crystalline nanowire
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Thermal conductivity of a single Bi_(0.5)Sb_(1.5)Te_3 single-crystalline nanowire

机译：Bi_（0.5）Sb_（1.5）Te_3单晶纳米线的热导率

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摘要

Single-crystalline Bi0.5Sb1.5Te3 nanowires were fabricated by a template-assisted pulsed electrodeposition technique; the thermal conductivity of a single Bi_(0.5)Sb_(1.5)Te_3 nanowire of different diameters was characterized through a self-heating 3 ω method. The temperaturedependent resistance measurements prove the semiconductor behavior of the nanowires. The extremely low thermal conductivity of the nanowires was found compared with the corresponding bulk, and the Umklapp peaks shift to a higher temperature as the decreasing nanowire's diameter decreases, which qualitatively agrees with the theoretical calculations based on the Callaway model. The boundary scattering plays an important role in the reduction of the thermal conductivity and in the shift of the Umklapp peak of the Bi_(0.5)Sb_(1.5)Te_3 nanowires.
机译：采用模板辅助脉冲电沉积技术制备了单晶Bi0.5Sb1.5Te3纳米线。通过自加热3ω法表征了不同直径的Bi_（0.5）Sb_（1.5）Te_3纳米线的热导率。温度相关的电阻测量证明了纳米线的半导体性能。与相应的本体相比，发现纳米线的导热率极低，随着纳米线直径的减小，Umklapp峰移至更高的温度，这在质量上与基于Callaway模型的理论计算相符。边界散射在Bi_（0.5）Sb_（1.5）Te_3纳米线的热导率的降低和Umklapp峰的移动中起着重要作用。

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