Stepped surfaces of sapphire (Al2O3) with low miller indices

Godfrey C. Ndubuisi, Jingyue Liu, J. M. Cowley

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Oxygenannealed surfaces of sapphire with low Miller indices ((0001), {1010}, {1120}, {1011}) have been studied in both transmission electron microscopy (TEM) and reflection electron microscopy (REM) configurations. The significance of REM diffraction conditions for the determination of the nature of the step heights is discussed. The relationship between the TEM and REM images is explained. The structural features are those that might be expected from considerations of the atom arrangement in the low Miller index planes. The structural features on the surfaces varied with respect to annealing temperature and surface condition. Thermally stable structures that might appear from consideration of the equilibriumannealing temperature are proposed. Copyright1992 WileyLiss, Inc.

Original languageEnglish (US)
Pages (from-to)10-22
Number of pages13
JournalMicroscopy Research and Technique
Issue number1
StatePublished - Mar 1 1992


  • Relationships
  • Surface structural features
  • TEM and REM images

ASJC Scopus subject areas

  • Anatomy
  • Histology
  • Instrumentation
  • Medical Laboratory Technology


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