Au on vapor-liquid-solid grown Si nanowires: Spreading of liquid AuSi from the catalytic seed

Eric Dailey; Prashanth Madras; Jeffery Drucker

doi:10.1063/1.3487971

Au on vapor-liquid-solid grown Si nanowires: Spreading of liquid AuSi from the catalytic seed

Eric Dailey, Prashanth Madras, Jeffery Drucker

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

27 Scopus citations

Abstract

The presence and configuration of Au on the sidewalls of vapor-liquid-solid grown Si nanowires (NWs) was investigated using analytical (scanning) transmission and scanning electron microscopy. The relationship between growth conditions and Au/Si interface thermodynamics is shown to have a profound effect on NW growth. For some growth conditions, liquid AuSi can spread from the seed at the NW tip along the sidewalls during growth. This liquid film will phase separate and solidify, forming small Au clusters as the NW is cooled from the growth temperature. Growth conditions are correlated with the variety of Au cluster configurations found. The observed behavior can be explained by considering the thermodynamics of droplet spreading on cylinders.

Original language	English (US)
Article number	064320
Journal	Journal of Applied Physics
Volume	108
Issue number	6
DOIs	https://doi.org/10.1063/1.3487971
State	Published - Sep 15 2010

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Au on vapor-liquid-solid grown Si nanowires: Spreading of liquid AuSi from the catalytic seed",

abstract = "The presence and configuration of Au on the sidewalls of vapor-liquid-solid grown Si nanowires (NWs) was investigated using analytical (scanning) transmission and scanning electron microscopy. The relationship between growth conditions and Au/Si interface thermodynamics is shown to have a profound effect on NW growth. For some growth conditions, liquid AuSi can spread from the seed at the NW tip along the sidewalls during growth. This liquid film will phase separate and solidify, forming small Au clusters as the NW is cooled from the growth temperature. Growth conditions are correlated with the variety of Au cluster configurations found. The observed behavior can be explained by considering the thermodynamics of droplet spreading on cylinders.",

author = "Eric Dailey and Prashanth Madras and Jeffery Drucker",

note = "Funding Information: This work was supported by the Department of Energy under Award No. DE-FG02-06ER46345. We thank P. A. Crozier for guidance with STEM and EDX.",

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Au on vapor-liquid-solid grown Si nanowires: Spreading of liquid AuSi from the catalytic seed

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