Thermal conductivity of a single Bi sub(0.5)Sb sub(1.5)Te sub(3) single-crystalline nanowire

Single-crystalline Bi sub(0.5)Sb sub(1.5)Te sub(3) nanowires were fabricated by a template-assisted pulsed electrodeposition technique; the thermal conductivity of a single Bi sub(0.5)Sb sub(1.5)Te sub(3) nanowire of different diameters was characterized through a self-heating 3 omega method. The te...

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Published inNanotechnology Vol. 25; no. 41; pp. 1 - 7
Main Authors Li, Liang, Jin, Chiming, Xu, Sichao, Yang, Jiyong, Du, Haifeng, Li, Guanghai
Format Journal Article
LanguageEnglish
Published 17.10.2014
Subjects
Boundaries
Electrodeposition
Heat transfer
Nanotechnology
Nanowires
Semiconductors
Single crystals
Thermal conductivity
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Summary:Single-crystalline Bi sub(0.5)Sb sub(1.5)Te sub(3) nanowires were fabricated by a template-assisted pulsed electrodeposition technique; the thermal conductivity of a single Bi sub(0.5)Sb sub(1.5)Te sub(3) nanowire of different diameters was characterized through a self-heating 3 omega method. The temperature-dependent 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 sub(0.5)Sb sub(1.5)Te sub(3) nanowires.
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ISSN:0957-4484
1361-6528