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

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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
Volume606
Issue number23-24
DOIs
Publication statusPublished - Dec 2012

Keywords

  • Equilibrium state
  • Faceting
  • High temperature annealing
  • Sapphire

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Equilibrium faceting formation in vicinal Al 2O 3 (0001) surface caused by annealing'. Together they form a unique fingerprint.

  • Cite this

    Verre, R., Sofin, R. G. S., Usov, V., Fleischer, K., Fox, D., Behan, G., Zhang, H., & Shvets, I. V. (2012). Equilibrium faceting formation in vicinal Al 2O 3 (0001) surface caused by annealing. Surface Science, 606(23-24), 1815-1820. https://doi.org/10.1016/j.susc.2012.07.024