title: Reversible switching of InP nanowire growth direction by catalyst engineering.
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.
authors.affiliation: Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands.
authors.forename: Jia
authors.initials: J
authors.lastname: Wang
authors.forename: Sébastien R
authors.initials: SR
authors.lastname: Plissard
authors.forename: Marcel A
authors.initials: MA
authors.lastname: Verheijen
authors.forename: Lou-Fé
authors.initials: LF
authors.lastname: Feiner
authors.forename: Alessandro
authors.initials: A
authors.lastname: Cavalli
authors.forename: Erik P A M
authors.initials: EP
authors.lastname: Bakkers