Innocenzi, Plinio and Malfatti, Luca and Kidchob, Tongjit and Enzo, Stefano and Della Ventura, Giancarlo and Schade, Ulrich and Marcelli, Augusto Claudio (2010) Correlative analysis of the crystallization of sol−gel dense and mesoporous anatase titania films. The Journal of Physical Chemistry. C, Vol. 114 (51), p. 22385-22391. eISSN 1932-7455. Article.
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Mesoporous and dense sol−gel titania films have been synthesized and processed in similar conditions to make a comparative study of crystallization to anatase in porous and dense samples. We have performed a correlative analysis combining THz spectroscopy with synchrotron radiation, variable angle incidence infrared spectroscopy, spectroscopic ellipsometry and grazing incidence X-ray diffraction to characterize the structure of titania films as a function of thermal processing conditions. THz spectra have shown that small anatase crystalline clusters are already present in the as-deposited samples, and both crystallization and growth process are favored in the mesoporous films. Moreover, the analysis by X-ray diffraction and variable angle incidence infrared spectroscopy has allowed identification of the presence of small textures in the samples.
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