Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5426122 | Surface Science | 2007 | 8 Pages |
Abstract
We have explored the systematics of TiO2 polymorph nucleation during film growth by molecular beam epitaxy on perovskite substrates. The accidental lattice match between anatase (0Â 0Â 1) and LaAlO3(0Â 0Â 1) or SrTiO3(0Â 0Â 1) typically results in anatase nucleation at the interface. However, the growth conditions dictate whether or not rutile also nucleates, and the associated morphological and structural properties of the composite film. Four symmetry equivalent epitaxial orientations of rutile on anatase are observed when rutile nucleates as discrete particles on LaAlO3(0Â 0Â 1). Such films constitute model systems for studying the anatase/rutile interface, which is of considerable current interest in photochemistry.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Rui Shao, Chongmin Wang, David E. McCready, Timothy C. Droubay, Scott A. Chambers,