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
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.