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- Title
Characterization of Anatase TiO<sub>2</sub> Nanopowder by Variable-Temperature Raman Spectroscopy.
- Authors
Šcepanovic, M. J.; Grujic-Brojcin, M.; Dohcevic-Mitrovic, Z. D.; Popovic, Z. V.
- Abstract
Raman spectroscopy has been used for characterization of commercial nanosized TiO2 powder with declared grain size of 5 nm. The Raman spectra measured in Stokes and anti-Stokes regime confirm the anatase phase of TiO2 powder in temperature range 25- 1173 K. It is shown that phonon-confinement (due to small grain size) and nonstoichiometry (caused by laser irradiation in vacuum) have a great influence on blueshift and broadening of the main Eg Raman mode at low temperatures, while the influence of the strong anharmonic effect becomes dominant at higher temperatures. The phonon confinement effect decreases due to the crystallite growth at temperatures above 673 K.
- Subjects
TITANIUM dioxide; NANOSTRUCTURED materials; RAMAN spectroscopy; PHONONS; STOICHIOMETRY
- Publication
Science of Sintering, 2009, Vol 41, Issue 1, p67
- ISSN
0350-820X
- Publication type
Article
- DOI
10.2298/SOS0901067S