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Image_Marcus_Tornberg_withScale

Marcus Tornberg

Postdoctoral Fellow

Image_Marcus_Tornberg_withScale

Thermodynamic stability of gold-assisted InAs nanowire growth

Author

  • Marcus Tornberg
  • Kimberly A. Dick
  • Sebastian Lehmann

Summary, in English

Growth of III-V semiconductor nanowires is generally assisted by a liquid particle in order to get a highly anisotropic crystallization. The thermodynamic stability of the particle is therefore of importance for control and understanding of the nanowire growth process. In this report we explore the particle stability by manipulating its properties, specifically its surface tension and volume, by accumulating indium in the particle during nanowire growth. We demonstrate a droplet displacement, from the top to one of the nanowire side facets, when exceeding the stability limit for a gold particle wetting an [0001]-oriented InAs nanowire. This particle displacement is attributed to a lowered surface tension and a truncation of the top facet. In addition, our results indicate reversibility of the displacement, showing that the (111/0001) facet is the most favorable for a droplet to wet during common growth conditions. The stability condition for InAs growth is determined experimentally, and the understanding developed can easily be applied to other III-V nanowires.

Department/s

  • Solid State Physics
  • Centre for Analysis and Synthesis
  • NanoLund

Publishing year

2017

Language

English

Pages

21678-21684

Publication/Series

Journal of Physical Chemistry C

Volume

121

Issue

39

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Condensed Matter Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1932-7447