Synthetics of ZnO nanowires on GaN micro-pyramids by gold catalyst

C. H. Xu, K. Leung, J. Hu, C. Surya

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

GaN micro-pyramids were fabricated on n-type CaN buffer layer/c-plane sapphire wafer. In order to understand the growing ZnO on GaN {1-1 0 1} facets, ZnO nanostructures on GaN micro-pyramids with and without Au catalyst were synthesized by chemical vapor deposition (CVD). As-prepared ZnO nanostructures were characterized by a scanning electron microscope (SEM) and a transmission electron microscope (TEM). ZnO nano-sheets on the micro-pyramids without Au catalyst have a terrace-like structure, which is explained by vapor-solid mechanism. ZnO nanowires with a gold particle on the top grow on micro-pyramids with Au catalyst, which is explained by vapor-liquid-solid mechanism. Nanowire bridges crosslinking two adjacent micro-pyramids are frequently observed, which demonstrates the capability to develop self-organizing electrical interconnects and nanoscale devices. The diameters of the resulting ZnO nanowires are in the range of 40-100 nm with typical length about 10 μm.

Original languageEnglish
Pages (from-to)100-103
Number of pages4
JournalMaterials Letters
Volume74
DOIs
Publication statusPublished - May 1 2012
Externally publishedYes

Keywords

  • Crystal growth
  • Deposition
  • Epitaxial growth
  • Nanomaterials
  • Semiconductors

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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