Journal of Inorganic Materials ›› 2014, Vol. 29 ›› Issue (11): 1199-1203.DOI: 10.15541/jim20140087

• Orginal Article • Previous Articles     Next Articles

Synthesis of Jumbo-size Single Crystalline Bi2Se3 Nanoplates and Nanoribbons by Vapor Transportation

LI Xiao-Shuai1, WANG Zeng-Mei1, 2, ZHU Ming-Fang3, WANG Shan-Peng2, TAO Xu-Tang2, LU Jun1, CHEN Xing-Tao1, XU Jia-Le1   

  1. (1. Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China; 2. State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China; 3. Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, China)
  • Received:2014-02-27 Revised:2014-04-13 Published:2014-11-20 Online:2014-10-24
  • About author:LI Xiao-Shuai. E-mail: lixsseu@163.com
  • Supported by:
    Natural Science Foundation of China(51002029);Opening project for State Key Laboratory of Crystal Materials, Shandong University, China(KF1107)

Abstract:

Low-dimensional Bi2Se3 nanomaterials were discovered to be new three-dimensional (3D) topological insulators (TIs) recently, which have broad application prospect in the field of microelectronic devices and sensors. Single crystalline Bi2Se3 nanoplates (NPs) and nanoribbons (NRs) with jumbo size were synthesized in the vacuum quartz tube via vapor transportation. The crystal structure, composition and morphology of the as-prepared Bi2Se3 NPs and NRs were analyzed by XRD, EDS, Raman and SEM. It is found that both of the two specimens are well-crystallized in the direction of {001} with a high purity. Bi2Se3 NPs have a large lateral size of 15-180 μm, while Bi2Se3 NRs have a large length of 860 μm and a width of about 5 μm. Besides, the probable growth mechanism is proposed based on the analysis of the SEM images of Bi2Se3 NPs and NRs prepared at different temperatures and the binding energy difference along different directions. Bi2Se3 has a quicker growth speed along <001> and directions in relatively high temperature to form single crystalline NPs with large lateral size, while it grows faster along direction in lower temperature to get single crystalline NRs with large length. All these results not only improve the preparation process of Bi2Se3 nanomaterials with jumbo size, but also promote the commercial use in the field of microelectronic devices.

Key words: vapor transportation, Bi2Se3 nanoplates, Bi2Se3 nanoribbons

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