Failure of the vapor-liquid-solid mechanism in Au-assisted MOVPE growth of InAs nanowires.
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.
Dick
Kimberly A
KA
Solid State Physics, Lund University, Box 118, S-221 00 Lund, Sweden. kimberly.dick@ftf.lth.se
Deppert
Knut
K
Mårtensson
Thomas
T
Mandl
Bernhard
B
Samuelson
Lars
L
Seifert
Werner
W