Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 35, Issue 11, Pages 3103-3109Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.04.041
Keywords
Titania; Anatase-to-rutile; Phase transformation; Inverse opal; Photonic crystal
Categories
Funding
- German Research Foundation (DFG) [SFB 986 M3]
Ask authors/readers for more resources
The applications and processing of nanostructured materials at high temperatures require stability of their morphology. However, in such environments (>1000 degrees 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 degrees 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. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available