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Nano Research

Article Title

Controlling the lateral and vertical dimensions of Bi2Se3 nanoplates via seeded growth

Authors

Awei Zhuang, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technologyof China, Hefei Anhui 230026, P. R. China
Yuzhou Zhao, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technologyof China, Hefei Anhui 230026, P. R. China
Xianli Liu, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technologyof China, Hefei Anhui 230026, P. R. China
Mingrui Xu, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technologyof China, Hefei Anhui 230026, P. R. China
Youcheng Wang, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technologyof China, Hefei Anhui 230026, P. R. China
Unyong Jeong, Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seoul, Korea
Xiaoping Wang, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technologyof China, Hefei Anhui 230026, P. R. China
Jie Zeng, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technologyof China, Hefei Anhui 230026, P. R. China

Keywords

bismuth selenide, nanoplates, seeded growth, kinetic control

Abstract

Modulation of the morphology of nanostructures is often a rewarding but challenging task. We have employed the seeded growth method and induced kinetic control to synthesize Bi2Se3 nanoplates with modifiable morphology. By manipulating the rate at which precursor solutions were injected into seeds solution with syringe pumps, two distinctive growth modes could berealized. With a fast injection, the thickness of Bi2Se3 nanoplates slightly increased from ~7.5 nm (seeds) to ~9.5 nm while the edge length grew up from ~160 nm (seeds) to ~12 μm, after 6 successive rounds of seeded growth. With a slow injection, the thickness and edge length increased simultaneously to ~35 nm and ~6 μm after 6 rounds of growth, respectively. These two modes could be viewed as a competition between atomic deposition and surface migration. The products showed interesting, thickness-dependent Raman properties. In addition, NIR transparent, highly conductive and flexible Bi2Se3 thin films with different thicknesses were constructed by the assembly of the as-synthesized Bi2Se3 nanoplates. This approach based on seeded growth and kinetic control can significantly promote the development of versatile nanostructures with diverse morphology.

Graphical Abstract

Publisher

Tsinghua University Press

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