Equilibrium faceting formation in vicinal Al 2O 3 (0001) surface caused by annealing

R. Verre*, R. G.S. Sofin, V. Usov, K. Fleischer, D. Fox, G. Behan, H. Zhang, I. V. Shvets

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


We report on a heat-induced transformation of the surface of α-alumina (0001) crystals which have an off-cut in the [12̄10] direction. Annealing the crystal causes the surface to transform into a regular array of (0001) and (12̄16) facets. The resultant faceted morphology represents the equilibrium state of the system. It is demonstrated that the average terrace periodicity is determined by the annealing temperature. Possible causes for the surface rearrangement are also discussed. This method could be used for producing templates with controlled periodicity for growth of nanostructure arrays.

Original languageEnglish
Pages (from-to)1815-1820
Number of pages6
JournalSurface Science
Issue number23-24
Publication statusPublished - Dec 2012
Externally publishedYes


  • Equilibrium state
  • Faceting
  • High temperature annealing
  • Sapphire

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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