Abstract
The epitaxial growth of MoO 2 crystallites on a Mo(110) surface has been studied by RHEED. The Mo surface was heated at 850°C in an oxygen atmosphere of 2 × 10 −6 Torr. The RHEED (reflection high energy electron diffraction) pattern shows diffraction streaks due to the 1 × 1 structure of the Mo(110) surface and diffraction spots from the MoO 2 crystallites. The MoO 2 crystallites grow on the Mo surface with epitaxial orientation relationships. The transmission pattern of the MoO 2 crystallites diminished at 1100°C, indicating that the epitaxially grown crystallites evaporated from the surface. At temperatures exceeding 1100°C, complex two-dimensionally ordered structures induced by oxygen, appeared. Finally, only the 2 × 2 structure remained. By heating the specimen at 1600°C in a vacuum of 10 −10 Torr, a Mo clean 1 × 1 structure was obtained.
Published Version
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