Controlling the growth mechanism of ZnO nanowires by selecting catalysts

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

112 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 languageEnglish (US)
Pages (from-to)17500-17505
Number of pages6
JournalJournal of Physical Chemistry C
Volume111
Issue number47
DOIs
StatePublished - Nov 29 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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