Failure of the vapor-liquid-solid mechanism in Au-assisted MOVPE growth of InAs nanowires |
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Authors: | Dick Kimberly A Deppert Knut Mårtensson Thomas Mandl Bernhard Samuelson Lars Seifert Werner |
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Affiliation: | Solid State Physics, Lund University, Box 118, S-221 00 Lund, Sweden. kimberly.dick@ftf.lth.se |
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Abstract: | We report the temperature dependence of the Au-assisted growth of InAs nanowires in MOVPE. Extensive studies of the growth of such nanowires have attributed growth to the so-called vapor-liquid-solid (VLS) mechanism, with a liquid Au-In alloy particle. We assert here that growth is instead assisted by a solid particle and does not occur at all when the particle is a liquid. Thus the temperature range of InAs nanowire growth is limited by the melting of the Au-In alloy. Comparison with growth of InAs nanowires in the same system assisted by a layer of SiO(x) is used to support this conclusion. |
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