Impact of the liquid phase shape on the structure of III-V nanowires |
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Authors: | Krogstrup Peter Curiotto Stefano Johnson Erik Aagesen Martin Nygård Jesper Chatain Dominique |
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Institution: | Nano-Science Center, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark. krogstrup@fys.ku.dk |
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Abstract: | The III-V nanowire structure (zinc blende or wurtzite) grown by the vapor-liquid-solid process is shown to be highly dependent on the parameters which shape the droplet at the top of the nanowire. Under conditions that the droplet volume does not exceed a certain value, it is demonstrated that when the nucleation of the solid starts at the solid-liquid-vapor triple line, a relatively large droplet volume and low wetting angle favor the formation of the wurtzite structure. We show that the effective V/III flux ratio is the primary parameter controlling the structure. |
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