Morphological evolution of the hydrogen reduced MoO{sub 3-x}(010) surface during reoxidation
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
The reduction and reoxidation of the MoO{sub 3}(010) surface have been studied with atomic force microscopy (AFM). Reduction in forming gas at 400{degrees}C results in the formation of two surface modifying defects, crystallographic shear (CS) planes and surface voids. Reoxidation in air at 400{degrees}C proceeds more slowly than reduction; it takes between 0.5 and 1.5 hours to completely oxidize the surface and annihilate the CS planes that were created during only 8 min of reduction. The surface voids persist through the oxidation treatments and, in fact, show morphological changes. Both the lateral and vertical dimensions of the voids increase and their bounding planes re-orient from mostly (101) and (100).
- OSTI ID:
- 577540
- Report Number(s):
- CONF-9604124--; CNN: Grant DMR-9458005
- Country of Publication:
- United States
- Language:
- English
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