Role of Rare Earth Elements and Entropy on the Anatase-To-Rutile Phase Transformation of TiO<sub>2</sub> Thin Films Deposited by Ion Beam Sputtering
D. Scoca, Felipe Cemin, Sara A. Bilmes, Carlos A. Figueroa, A. R. Zanatta, F. Alvarez
Abstract
films. As reported in the literature, the A-R transformation can be inhibited or enhanced by the presence of impurities and is mostly related to energetic contributions. The experimental results were analyzed, considering the essential and stabilizing role of the entropy of mixing in the A-R transformation due to the introduction of more and multiple quantum states originated in vacancies and impurities in the anatase phase.
Topics & Concepts
AnataseRutileMaterials scienceAmorphous solidSputteringThin filmX-ray photoelectron spectroscopyImpurityRaman spectroscopyTitaniumAnnealing (glass)OxygenAnalytical Chemistry (journal)Chemical engineeringNanotechnologyCrystallographyOpticsChemistryMetallurgyPhysicsOrganic chemistryBiochemistryEngineeringPhotocatalysisChromatographyCatalysisZnO doping and propertiesElectronic and Structural Properties of OxidesTiO2 Photocatalysis and Solar Cells