ZnO/Al2O3 core-shell nanorod arrays: Growth, structural characterization, and luminescent properties

C. Y. Chen, C. A. Lin, M. J. Chen, G. R. Lin, J. H. He

Research output: Contribution to journalArticlepeer-review

76 Scopus citations


We report an aqueous chemical method to fabricate well-aligned ZnO/Al 2O3 nanocrystal (NC) core-shell nanorod arrays (NRAs). Structural characterization showed that the shell layers are composed of α- Al2O3 nanocrystals. Photoluminescence measurements showed the enhancement of near-band-edge (NBE) emission of ZnO NRAs due to the presence of Al2O3 NC shells. The Al 2O3 NC shell layer resulting in the flat-band effect near the ZnO surface leads to a stronger overlap of the wavefunctions of electrons and holes in the ZnO core, further enhancing the NBE emission. This approach should be very useful in designing many other core-shell NRAs for creating varieties of high-efficiency optoelectronic devices.

Original languageEnglish (US)
Article number185605
Issue number18
StatePublished - 2009

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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