Nanosize effect in germanium nanowire growth with binary metal alloys

Biswas, Subhajit; O'Regan, Colm; Morris, Michael A.; Holmes, Justin D.

Nanosize effect in germanium nanowire growth with binary metal alloys

Files

MRS_15-1751-1.pdf(501.58 KB)

Published Version

Date

2015-02

Authors

Biswas, Subhajit

O'Regan, Colm

Morris, Michael A.

Holmes, Justin D.

Publisher

Cambridge University Press

Published Version

10.1557/opl.2015.143

Abstract

This article describes feasible and improved ways towards enhanced nanowire growth kinetics by reducing the equilibrium solute concentration in the liquid collector phase in a vapor-liquid-solid (VLS) like growth model. Use of bi-metallic alloy seeds (AuxAg1-x) influences the germanium supersaturation for a faster nucleation and growth kinetics. Nanowire growth with ternary eutectic alloys shows Gibbs-Thompson effect with diameter dependent growth rate. In-situ transmission electron microscopy (TEM) annealing experiments directly confirms the role of equilibrium concentration in nanowire growth kinetics and was used to correlate the equilibrium content of metastable alloys with the growth kinetics of Ge nanowires. The shape and geometry of the heterogeneous interfaces between the liquid eutectic and solid Ge nanowires were found to vary as a function of nanowire diameter and eutectic alloy composition.

Keywords

Nanostructure , Transmission electron microscopy (TEM) , Germanium (Ge)

Citation

Subhajit Biswas, Colm O’Regan, Michael A. Morris and Justin D. Holmes (2015). Nanosize effect in Germanium nanowire growth with binary metal alloys. MRS Proceedings, 1751, mrsf14-1751-ll07-05 doi:10.1557/opl.2015.143.