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Electrochemical Assembly of Thermoelectric Bi2Te3/Bi2Se3 Nano-spring Materials
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Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University

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    Abstract:

    Bi2Te3/Bi2Se3 multi-layered nanowire arrays with the spring morphology were firstly fabricated by pulsed current electrodeposition. Also, the deposition course was monitored by electrochemical workstation connecting with a computer. In addition, the phase structure and morphology were characterized by XRD, FE-SEM and TEM, inspectively. The results showed that the pulsed current electrodeposition method could be used to prepare multi-layered nanowire arrays. According to investigation, the whole resistance of the three-electrode electrochemical system gradually increased. But the increasing degree of the resistance became smaller and smaller. Besides, the results of XRD analysis showed that the as-deposited multi-layed nanowire arrays were Bi2Te3/Bi2Se3 nanowires. Meanwhile, there were some “satellite peaks” appeared in the XRD pattern. This also conformed the as-fabricated materials were multi-layered nanowires. What’s more, the morphology of the as-prepared materials was spring-like morphology. The two phases could be distinguished by their own color. In order to investigate the effect of pulsed time on the length of each periodical segment, we change the pulsed time and prepared another sample. According to the results of TEM, the length of each segment could be tuned.

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[Li Xiaolong, Zhou Chunsheng, Di Youying, Hou Xiaojie, Li Yanyi, Chen Fengying, Yuan Chunmei, Huang Na, Wei Wei. Electrochemical Assembly of Thermoelectric Bi2Te3/Bi2Se3 Nano-spring Materials[J]. Rare Metal Materials and Engineering,2021,50(12):4486~4492.]
DOI:10.12442/j. issn.1002-185X.20200946

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History
  • Received:December 09,2020
  • Revised:January 28,2021
  • Adopted:March 08,2021
  • Online: January 09,2022
  • Published: December 24,2021