Research Article


2016, 9(9): 2707–2714


Ethylenediaminetetraacetic acid-assisted synthesis of Bi2Se3 nanostructures with unique edge sites

Xianli Liu, Zhicheng Fang, Qi Zhang, Ruijie Huang, Lin Lin, Chunmiao Ye, Chao Ma (*), and Jie Zeng (*)

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Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China

Keywords: Bi2Se3,edge sites,ethylenediaminetetraaceticacid (EDTA),dislocation source,supersaturation
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Nanomaterials with unique edge sites have received increasing attention dueto their superior performance in various applications. Herein, we employed aneffective ethylenediaminetetraacetic acid (EDTA)-assisted method to synthesizea series of exotic Bi2Se3 nanostructures with distinct edge sites. It was foundthat the products changed from smooth nanoplates to half-plate-containingand crown-like nanoplates upon increasing the molar ratio of EDTA to Bi3+.Mechanistic studies indicated that, when a dislocation source and relativelyhigh supersaturation exist, the step edges in the initially formed seeds canserve as supporting sites for the growth of epilayers, leading to the formationof half-plate-containing nanoplates. In contrast, when the dislocation sourceand a suitably low supersaturation are simultaneously present in the system,the dislocation-driven growth mode dominates the process, in which the stepedges form at the later stage of the growth responsible for the formation ofcrown-like nanoplates.
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Ethylenediaminetetraacetic acid-assisted synthesis of Bi2Se3 nanostructures with unique edge sites. Nano Res. 2016, 9(9): 2707–2714

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