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Temperature Characteristics of Raman Spectra in Nanometer Material Titanium Dioxide

Temperature Characteristics of Raman Spectra in Nanometer Material Titanium Dioxide,10.1088/0256-307X/11/11/008,Chinese Physics Letters,Xijun Wu,Ming-

Temperature Characteristics of Raman Spectra in Nanometer Material Titanium Dioxide   (Citations: 1)
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Raman spectra of the nanophase titanium dioxide were examined at various annealing temperatures. The temperature dependences of the Raman modes at 702, 612, 422, 230-250, and 152 cm-1 are discussed. The 702 cm-1 A2g mode belongs to first-order phonon connected to a critical nature of the selection rules with respect to the grain size. Lower anatase-rutile transition temperature 700° C is closely related to smaller grain size. The Eg mode at 422 cm-1 at room temperature shifts upward 24 cm-1 after successive annealing in air for one hour at 700° C, indicating the dependence of the lower mode frequency upon the larger oxygen deficiency.
Journal: Chinese Physics Letters - CHIN PHYS LETT , vol. 11, no. 11, pp. 685-688, 1994
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