Studies of single crystal TiO2 (001) and (100) surfaces by reflection high energy electron diffraction and reflection electron microscopy

L. Wang, Jingyue Liu, J. M. Cowley

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Reflection electron microscopy combined with reflection high energy electron diffraction has been used to investigate rutile (001) and (100) surfaces which are annealed in an oxygen atmosphere at 1425°C for 36 h. The stereoscopic observations on rutile surface structures have been accomplished by imaging at different azimuthal directions satisfying surface resonance conditions. The (001) surface is shown to be faceted on {214} planes. Large areas of flat terraces 0.5-1.0 microm wide and big steps 20-30 nm high are the main features observed on the rutile (100) surface. Strain fields near big step edges are responsible for the streaks observed in REM images. The slip traces observed on the (100) surface are along the [010] direction, which are consistent with the slip system {011} 〈01̄1〉 of non-reduced bulk crystal. Contamination particles, acting as pinning sites along big steps, have significant influences on the surface morphology.

Original languageEnglish (US)
Pages (from-to)141-157
Number of pages17
JournalSurface Science
Volume302
Issue number1-2
DOIs
StatePublished - Jan 20 1994

ASJC Scopus subject areas

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

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