Volume 53, Issue 25 pp. 6425-6429
Communication

Screw-Dislocation-Driven Bidirectional Spiral Growth of Bi2Se3 Nanoplates

Awei Zhuang

Awei Zhuang

Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://zengnano.ustc.edu.cn/

Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China)

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Jia-Jun Li

Jia-Jun Li

Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://zengnano.ustc.edu.cn/

Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China)

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You-Cheng Wang

You-Cheng Wang

Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://zengnano.ustc.edu.cn/

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Xin Wen

Xin Wen

Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://zengnano.ustc.edu.cn/

Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China)

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Yue Lin

Yue Lin

Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://zengnano.ustc.edu.cn/

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Prof. Bin Xiang

Prof. Bin Xiang

Center of Advanced Nanocatalysis (CAN-USTC) and School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China)

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Prof. Xiaoping Wang

Prof. Xiaoping Wang

Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://zengnano.ustc.edu.cn/

Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China)

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Prof. Jie Zeng

Corresponding Author

Prof. Jie Zeng

Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://zengnano.ustc.edu.cn/

Center of Advanced Nanocatalysis (CAN-USTC) and School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China)

Hefei National Laboratory for Physical Sciences at the Microscale and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China) http://zengnano.ustc.edu.cn/Search for more papers by this author
First published: 14 May 2014
Citations: 101

This research was supported by MOST of China (2014CB932700 and 2011CB921403), the NSFC (Grant Nos. 21203173, 51371164, and J1030412), Strategic Priority Research Program B of the CAS (Grant No. XDB01020000), and Fundamental Research Funds for the Central Universities (WK2340000050 and WK2060190025).

Graphical Abstract

Interesting faces with chiseled features: No longer limited to nanoribbons and smooth nanoplates, Bi2Se3 nanostructures in the form of spiral-type nanoplates with a bipyramid-like shape characterized by two sets of centrosymmetric helical fringes on the top and bottom faces were formed by a bidirectional growth process. Other evidence for the unique structure and growth mode include herringbone contours, spiral arms, and hollow cores (see picture).

Abstract

Bi2Se3 attracts intensive attention as a typical thermoelectric material and a promising topological insulator material. However, previously reported Bi2Se3 nanostructures are limited to nanoribbons and smooth nanoplates. Herein, we report the synthesis of spiral Bi2Se3 nanoplates and their screw-dislocation-driven (SDD) bidirectional growth process. Typical products showed a bipyramid-like shape with two sets of centrosymmetric helical fringes on the top and bottom faces. Other evidence for the unique structure and growth mode include herringbone contours, spiral arms, and hollow cores. Through the manipulation of kinetic factors, including the precursor concentration, the pH value, and the amount of reductant, we were able to tune the supersaturation in the regime of SDD to layer-by-layer growth. Nanoplates with preliminary dislocations were discovered in samples with an appropriate supersaturation value and employed for investigation of the SDD growth process.

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