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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 be realized. 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.

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Publication history

Received: 14 September 2014
Revised: 26 November 2014
Accepted: 27 November 2014
Published: 20 December 2014
Issue date: January 2015

Copyright

© Tsinghua University Press and Springer‐Verlag Berlin Heidelberg 2014

Acknowledgements

Acknowledgements

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

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Reprints and Permission requests may be sought directly from editorial office.
Email: nanores@tup.tsinghua.edu.cn

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