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Nano Research

, Volume 12, Issue 11, pp 2718–2722 | Cite as

Au-catalysed free-standing wurtzite structured InAs nanosheets grown by molecular beam epitaxy

  • Qiang Sun
  • Han Gao
  • Xiaomei Yao
  • Kun Zheng
  • Pingping Chen
  • Wei Lu
  • Jin ZouEmail author
Research Article

Abstract

In this study, we report the growth of free-standing InAs nanosheets using Au catalysts in molecular beam epitaxy. Detailed structural characterizations suggest that wurtzite structured InAs nanosheets, with features of extensive \(\{11\overline{2}0\}\) surfaces, grown along the \(<1\overline{1}0\overline{2}>\) direction and adopted {0001} nanosheet/catalyst interfaces, are initiated from wurtzite structured \([000\overline{1}]\) nanowires as the inclined epitaxial growth due to relatively higher In concentrations in Au catalysts, and grown from these inclined nanostructures through catalyst-induced axial growth and their enhanced lateral growth under the high growth temperature. Based on the facts that the nanosheets contain large low energy \(\{11\overline{2}0\}\) surfaces and {0001} nanosheet/catalyst interfaces, the growth of our nanosheets is a thermodynamically driven process. This study provides new insights into fabricating free-standing III-V nanosheets for their applications in future nanoscale devices.

Keywords

InAs nanosheet wurtzite structure catalyst supersaturation molecular beam epitaxy 

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Notes

Acknowledgements

The authors declare no competing financial interest. This research was supported by the Australian Research Council, the National Key R&D Program of China (No. 2016YFB0402401), the National Natural Science Foundation of China (Nos. 11634009 and 11774016) and the Key Programs of Frontier Science of the Chinese Academy of Sciences (No. QYZDJ-SSW-JSC007). The Australian Microscopy & Microanalysis Research Facility is also gratefully acknowledged for providing microscopy facilities for this study.

Supplementary material

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Au-catalysed free-standing wurtzite structured InAs nanosheets grown by molecular beam epitaxy

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Qiang Sun
    • 1
  • Han Gao
    • 1
  • Xiaomei Yao
    • 1
    • 2
    • 3
  • Kun Zheng
    • 4
  • Pingping Chen
    • 2
  • Wei Lu
    • 2
  • Jin Zou
    • 1
    • 5
    Email author
  1. 1.Materials EngineeringThe University of QueenslandSt LuciaAustralia
  2. 2.State Key Laboratory for Infrared Physics, Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghaiChina
  3. 3.University of Chinese Academy of SciencesBeijingChina
  4. 4.Institute of Microstructure and Properties of Advanced MaterialsBeijing University of TechnologyBeijingChina
  5. 5.Centre for Microscopy and MicroanalysisThe University of QueenslandSt LuciaAustralia

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