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

11 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

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Annealing
annealing
periodic variations
Crystals
Aluminum Oxide
causes
crystals
flat surfaces
Nanostructures
Alumina
templates
aluminum oxides
heat
Temperature
temperature
Hot Temperature
Direction compound

Keywords

  • Equilibrium state
  • Faceting
  • High temperature annealing
  • Sapphire

ASJC Scopus subject areas

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

Cite this

Verre, R., Sofin, R. G. S., Usov, V., Fleischer, K., Fox, D., Behan, G., ... 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

Equilibrium faceting formation in vicinal Al 2O 3 (0001) surface caused by annealing. / Verre, R.; Sofin, R. G S; Usov, V.; Fleischer, K.; Fox, D.; Behan, G.; Zhang, H.; Shvets, I. V.

In: Surface Science, Vol. 606, No. 23-24, 12.2012, p. 1815-1820.

Research output: Contribution to journalArticle

Verre, R, Sofin, RGS, Usov, V, Fleischer, K, Fox, D, Behan, G, Zhang, H & Shvets, IV 2012, 'Equilibrium faceting formation in vicinal Al 2O 3 (0001) surface caused by annealing', Surface Science, vol. 606, no. 23-24, pp. 1815-1820. https://doi.org/10.1016/j.susc.2012.07.024
Verre, R. ; Sofin, R. G S ; Usov, V. ; Fleischer, K. ; Fox, D. ; Behan, G. ; Zhang, H. ; Shvets, I. V. / Equilibrium faceting formation in vicinal Al 2O 3 (0001) surface caused by annealing. In: Surface Science. 2012 ; Vol. 606, No. 23-24. pp. 1815-1820.
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