Aligning one-dimensional arrays of nanoclusters on a thin film of Al2O3 grown on vicinal NiAl surfaces

M. F. Luo, J. Y. Huang, C. I. Chiang, G. R. Hu, C. C. Wang, C. T. Wang, C. W. Lin

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We present a self-organised approach for the synthesis of one-dimensional (1D) arrays of supported nanoclusters. By oxidising NiAl surfaces vicinal to the (1 0 0) plane tilted along the crystallographic direction [0 1 0], we produced ordered thin films of θ-Al2O3 that exhibit uniform protrusion stripes propagating uniquely along direction [0 0 1] of the NiAl. These protrusions are preferential centres for nucleation of metal deposited from a vapour; the nanoclusters grown from such metal are aligned and form massive 1D cluster arrays along direction [0 0 1]. The arrays of Co nanoclusters exhibit a diameter as small as 3 nm and length exceeding a micrometer. The results imply prospective applications for which a patterned assembly of nanoclusters is desired.

Original languageEnglish
Pages (from-to)558-565
Number of pages8
JournalSurface Science
Volume603
Issue number3
DOIs
StatePublished - 1 Feb 2009

Keywords

  • 1D arrays
  • AlO thin film
  • LEED
  • Nanoclusters
  • STM
  • Vicinal NiAl

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