Coexistence of vapor-liquid-solid and vapor-solid-solid growth modes in Pd-Assisted InAs nanowires

Stefan Heun; Boya Radha; Daniele Ercolani; Giridhar U. Kulkarni; Francesca Rossi; Vincenzo Grillo; Giancarlo Salviati; Fabio Beltram; Lucia Sorba

doi:10.1002/smll.201000811

Coexistence of vapor-liquid-solid and vapor-solid-solid growth modes in Pd-Assisted InAs nanowires

Stefan Heun^*, Boya Radha, Daniele Ercolani, Giridhar U. Kulkarni, Francesca Rossi, Vincenzo Grillo, Giancarlo Salviati, Fabio Beltram, Lucia Sorba

^*Corresponding author for this work

Condensed Matter Physics Group

Research output: Contribution to journal › Article › peer-review

Abstract

During the growth of InAs nanowires from Pd catalyst particles on InAs(111)A substrates, two distinct classes of nanowires are observed with smooth or zigzagged sidewalls. It is shown that this is related to a bimodal distribution of the wire-tip diameter: above a critical diameter wires grow with smooth sidewalls, and below with zigzagged morphology. Transmission electron microscopy analysis shows that the catalyst particles at the tip of zigzagged wires are smooth and have a higher aspect ratio than those at the tip of smooth wires. Zigzagged wires grow from liquid particles in the vapor- liquid-solid (VLS) mode whereas the smooth ones grow from solid particles in the vapor-solid-solid (VSS) mode.

Original language	English
Pages (from-to)	1935-1941
Number of pages	7
Journal	Small
Volume	6
Issue number	17
DOIs	https://doi.org/10.1002/smll.201000811
Publication status	Published - 6 Sept 2010

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title = "Coexistence of vapor-liquid-solid and vapor-solid-solid growth modes in Pd-Assisted InAs nanowires",

abstract = "During the growth of InAs nanowires from Pd catalyst particles on InAs(111)A substrates, two distinct classes of nanowires are observed with smooth or zigzagged sidewalls. It is shown that this is related to a bimodal distribution of the wire-tip diameter: above a critical diameter wires grow with smooth sidewalls, and below with zigzagged morphology. Transmission electron microscopy analysis shows that the catalyst particles at the tip of zigzagged wires are smooth and have a higher aspect ratio than those at the tip of smooth wires. Zigzagged wires grow from liquid particles in the vapor- liquid-solid (VLS) mode whereas the smooth ones grow from solid particles in the vapor-solid-solid (VSS) mode.",

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AU - Heun, Stefan

AU - Radha, Boya

AU - Ercolani, Daniele

AU - Kulkarni, Giridhar U.

AU - Rossi, Francesca

AU - Grillo, Vincenzo

AU - Salviati, Giancarlo

AU - Beltram, Fabio

AU - Sorba, Lucia

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AB - During the growth of InAs nanowires from Pd catalyst particles on InAs(111)A substrates, two distinct classes of nanowires are observed with smooth or zigzagged sidewalls. It is shown that this is related to a bimodal distribution of the wire-tip diameter: above a critical diameter wires grow with smooth sidewalls, and below with zigzagged morphology. Transmission electron microscopy analysis shows that the catalyst particles at the tip of zigzagged wires are smooth and have a higher aspect ratio than those at the tip of smooth wires. Zigzagged wires grow from liquid particles in the vapor- liquid-solid (VLS) mode whereas the smooth ones grow from solid particles in the vapor-solid-solid (VSS) mode.

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Coexistence of vapor-liquid-solid and vapor-solid-solid growth modes in Pd-Assisted InAs nanowires

Abstract

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