期刊
THIN SOLID FILMS
卷 654, 期 -, 页码 23-29出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2018.03.073
关键词
Freestanding film; Te nanowire; Seebeck coefficient; Hydrothermal method
类别
资金
- National Natural Science Foundation of China [51762018, 51572117, 51463008, 11564015]
- Innovation Driven 5511 Project of Jiangxi Province [20165BCB18016]
- Jiangxi Science and Technology Normal University Innovation Fund of Postgraduates [YC2017-X35]
Low-dimensional tellurium-based nanowires (NWs) have gained much attention as ideal thermoelectric materials. The preparation of high quality NWs remains a challenge in the field of nanotechnology. Owing to the superior performance, tellurium (Te) NWs are attractive materials for many applications. In this work, the Te NWs were synthesized by a hydrothermal route. We acquired the ultra-fine Te NWs through optimization, and the diameter is 10-35 nm. The optimized Te nanofilm was freestanding and the Te/polyvinylidene fluoride film can be rolled up by a pencil which showed the flexibility of the membrane. The as-prepared Te NWs films have been investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. Although the ultra-fine Te NWs film shows the acceptable electrical conductivity, its Seebeck coefficient is as high as 551 mu VK-1 and the thermal conductivity is as low as 0.16 W m(-1) K-1. To achieve a higher thermoelectric performance, the effort will be devoted into the improvement of electrical conductivity in next work.
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