TITLE:
Unique Pulsed-Laser Deposition Production of Anatase and Rutile TiO2 on Al2O3
AUTHORS:
Alexandra Gordienko, Anthony B. Kaye
KEYWORDS:
Titania, Anatase, Rutile, Sapphire, PLD
JOURNAL NAME:
Crystal Structure Theory and Applications,
Vol.7 No.2,
May
31,
2018
ABSTRACT: Two pure hexagonal phases of titanium dioxide, anatase and rutile, were grown on c-cut Al2O3 substrates via pulsed-laser deposition by changing only the growth and annealing conditions, but without changing the substrate, target, or working gas. Purity of each phase was confirmed by x-ray diffraction, the quality of each film was studied using atomic force microscopy and scanning electron microscopy, and the interface between each substrate and film was studied using x-ray photoelectron spectroscopy. A binding layer of Ti2O3 was found to explain anatase growth under the very large lattice mismatch conditions.