Pasquarelli, Robert M.Robert M.PasquarelliLee, Hooi SingHooi SingLeeKubrin, RomanRomanKubrinZierold, RobertRobertZieroldPetrov, AlexanderAlexanderPetrovNielsch, KorneliusKorneliusNielschSchneider, Gerold A.Gerold A.SchneiderEich, ManfredManfredEichJanßen, RolfRolfJanßen2020-06-232020-06-232015-05-15Journal of the European Ceramic Society 11 (35): 3103-3109 (2015)http://hdl.handle.net/11420/6390The applications and processing of nanostructured materials at high temperatures require stability of their morphology. However, in such environments (>1000. °C), these structures are prone to significant undesired microstructural changes that result in a loss of functional properties. The thermal stability of titania inverse opal films, prepared from self-assembled templates of monodisperse polystyrene spheres by infiltration utilizing atomic layer deposition and subsequent calcination, was assessed. Resistance to grain growth and a shift in the anatase-to-rutile transformation to higher temperatures was observed, with dramatic stability under vacuum. Vacuum annealed samples retained the anatase phase and exhibited minimal grain growth even after 3. h at 1300. °C. Photonic properties were retained until the transformation onset. The remarkable resistance was attributed to inhibition of surface diffusion and structure-substrate constraints. In addition to being technologically enabling, the results provide further insight into the titania system and its phase transformation mechanism.en0955-221920151131033109Elsevier ScienceAnatase-to-rutileInverse opalPhase transformationPhotonic crystalTitaniaTechnikJournal Article10.1016/j.jeurceramsoc.2015.04.041Other