Journal
SURFACE SCIENCE
Volume 601, Issue 6, Pages 1582-1589Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2007.01.039
Keywords
anatase; rutile; molecular beam epitaxy
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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 (001) and LaAlO3(001) or SrTi03(001) 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(001). Such films constitute model systems for studying the anatase/rutile interface, which is of considerable current interest in photochemistry. (c) 2007 Elsevier B.V. All rights reserved.
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