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Synthesis and characterization of Sb2Te3 nanostructures

Luo Jun Liang Jing-Kui Rao Guang-Hui Zhang Fan Zhu Hang-Tian Liu Quan-Lin

Synthesis and characterization of Sb2Te3 nanostructures

Luo Jun, Liang Jing-Kui, Rao Guang-Hui, Zhang Fan, Zhu Hang-Tian, Liu Quan-Lin
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  • Abstract views:  2884
  • PDF Downloads:  768
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  • Received Date:  11 January 2010
  • Accepted Date:  03 February 2010
  • Published Online:  15 October 2010

Synthesis and characterization of Sb2Te3 nanostructures

  • 1. (1)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (2)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; (3)School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Abstract: Single-crystalline Sb2Te3 nanostructures, of which the bulk is one of the best thermoelectric materials at room temperature, are synthesized by chemical vapor deposition. The composition, crystal structure, and growth mechanism of the sample are investigated. According to our experimental results, Sb2Te3 normally grows into hexagonal nanoplates without using catalyst, but single-crystalline nanowires can be fabricated with Au nanoparticles as the catalyst. The growth mechanism of Sb2Te3 nanostructures is closely related to its anisotropic crystal structure. Sb2Te3 has a rhombohedral structure, which exhibits a layered anisotropy with the Te and Sb atom layers arranged along the c-axis. Moreover, there are two adjacent Te layers connected by van der Waals bonds. Therefore, Sb2Te3 prefers to grow into hexagonal plates in the ab-plane. When Au nanoparticles are used as the catalyst, the growth direction of the precipitated Sb2Te3 is restricted, leading to the formation of Sb2Te3 nanowires.

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