Abstract
We demonstrate high yield vapor-liquid-solid (VLS) growth of [100]-oriented InP nanowire arrays. The highest yield (97%) is obtained when the catalyst droplet is filled with indium prior to nanowire nucleation to the equilibrium composition during nanowire growth. Using these [100] wires as a template we can reversibly switch between a [100] and a [111] growth direction by varying the indium content of the droplet. Modeling VLS growth by a kinetic nucleation model indicates that the growth direction is governed by the liquid-vapor interface energy that is strongly affected by the indium concentration in the catalyst droplet.
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