Controlling the growth mechanism of ZnO nanowires by selecting catalysts

Z. Zhang; S. J. Wang; T. Yu; T. Wu

doi:10.1021/jp075296a

Controlling the growth mechanism of ZnO nanowires by selecting catalysts

Z. Zhang, S. J. Wang, T. Yu, T. Wu^*

^*Corresponding author for this work

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

122 Scopus citations

Abstract

The effect of catalysts on ZnO nanowire growth was investigated by comparing the performances of Au, Pt, and Ag nanoparticles. Additional control of growth was achieved by implementing a substrate temperature of either 800°C with a ZnO/graphite powder source or 500°C with a Zn powder source. At 800°C, the vapor-liquid-solid mechanism plays a very important role when the Au and Pt nanoparticles are in the liquid phase. On the other hand, nanowires can also be grown on solid nanoparticles, that is, oxidized Ag at 800°C and nanoscale cracks, that is, Pt at 500°C, where, the vapor-solid is the only possible mechanism. At 500°C, the vapor-liquid mechanism still dominates even though Au and Ag appear to be liquid, which is a result of high Zn vapor pressure.

Original language	English (US)
Pages (from-to)	17500-17505
Number of pages	6
Journal	JOURNAL OF PHYSICAL CHEMISTRY C
Volume	111
Issue number	47
DOIs	https://doi.org/10.1021/jp075296a
State	Published - Nov 29 2007
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Controlling the growth mechanism of ZnO nanowires by selecting catalysts",

abstract = "The effect of catalysts on ZnO nanowire growth was investigated by comparing the performances of Au, Pt, and Ag nanoparticles. Additional control of growth was achieved by implementing a substrate temperature of either 800°C with a ZnO/graphite powder source or 500°C with a Zn powder source. At 800°C, the vapor-liquid-solid mechanism plays a very important role when the Au and Pt nanoparticles are in the liquid phase. On the other hand, nanowires can also be grown on solid nanoparticles, that is, oxidized Ag at 800°C and nanoscale cracks, that is, Pt at 500°C, where, the vapor-solid is the only possible mechanism. At 500°C, the vapor-liquid mechanism still dominates even though Au and Ag appear to be liquid, which is a result of high Zn vapor pressure.",

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AU - Wang, S. J.

AU - Yu, T.

AU - Wu, T.

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N2 - The effect of catalysts on ZnO nanowire growth was investigated by comparing the performances of Au, Pt, and Ag nanoparticles. Additional control of growth was achieved by implementing a substrate temperature of either 800°C with a ZnO/graphite powder source or 500°C with a Zn powder source. At 800°C, the vapor-liquid-solid mechanism plays a very important role when the Au and Pt nanoparticles are in the liquid phase. On the other hand, nanowires can also be grown on solid nanoparticles, that is, oxidized Ag at 800°C and nanoscale cracks, that is, Pt at 500°C, where, the vapor-solid is the only possible mechanism. At 500°C, the vapor-liquid mechanism still dominates even though Au and Ag appear to be liquid, which is a result of high Zn vapor pressure.

AB - The effect of catalysts on ZnO nanowire growth was investigated by comparing the performances of Au, Pt, and Ag nanoparticles. Additional control of growth was achieved by implementing a substrate temperature of either 800°C with a ZnO/graphite powder source or 500°C with a Zn powder source. At 800°C, the vapor-liquid-solid mechanism plays a very important role when the Au and Pt nanoparticles are in the liquid phase. On the other hand, nanowires can also be grown on solid nanoparticles, that is, oxidized Ag at 800°C and nanoscale cracks, that is, Pt at 500°C, where, the vapor-solid is the only possible mechanism. At 500°C, the vapor-liquid mechanism still dominates even though Au and Ag appear to be liquid, which is a result of high Zn vapor pressure.

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Controlling the growth mechanism of ZnO nanowires by selecting catalysts

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