The nature of catalyst particles and growth mechanisms of GaN nanowires grown by Ni-assisted metal-organic chemical vapor deposition

Xiaojun Weng, Robert A. Burke, Joan Marie Redwing

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The structure and chemistry of the catalyst particles that terminate GaN nanowires grown by Ni-assisted metal-organic chemical vapor deposition were investigated using a combination of electron diffraction, high-resolution transmission electron microscopy, and x-ray energy dispersive spectrometry. The crystal symmetry, lattice parameter, and chemical composition obtained reveal that the catalyst particles are Ni3Ga with an ordered L 12 structure. The results suggest that the catalyst is a solid particle during growth and therefore favor a vapor-solid-solid mechanism for the growth of GaN nanowires under these conditions.

Original languageEnglish (US)
Article number085610
JournalNanotechnology
Volume20
Issue number8
DOIs
StatePublished - 2009

Fingerprint

Organic Chemicals
Organic chemicals
Nanowires
Chemical vapor deposition
Metals
Catalysts
Crystal symmetry
High resolution transmission electron microscopy
Electron diffraction
Spectrometry
Lattice constants
Vapors
X rays
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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The nature of catalyst particles and growth mechanisms of GaN nanowires grown by Ni-assisted metal-organic chemical vapor deposition. / Weng, Xiaojun; Burke, Robert A.; Redwing, Joan Marie.

In: Nanotechnology, Vol. 20, No. 8, 085610, 2009.

Research output: Contribution to journalArticle

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AB - The structure and chemistry of the catalyst particles that terminate GaN nanowires grown by Ni-assisted metal-organic chemical vapor deposition were investigated using a combination of electron diffraction, high-resolution transmission electron microscopy, and x-ray energy dispersive spectrometry. The crystal symmetry, lattice parameter, and chemical composition obtained reveal that the catalyst particles are Ni3Ga with an ordered L 12 structure. The results suggest that the catalyst is a solid particle during growth and therefore favor a vapor-solid-solid mechanism for the growth of GaN nanowires under these conditions.

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