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A Raman Scattering Study of PbTiO3 and TiO2 Obtained by Sol-Gel |
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| Authors: | D. Bersani P.P. Lottici T. Lopez Xing-Zhao Ding |
| Affiliation: | (1) Istituto Nazionale per la Fisica della Materia and Physics Department, University, Viale delle Scienze, 43100 PARMA, Italy;(2) Departamento de Química, Universidad Autonoma Metropolitana-Iztapalapa, A.P. 55-534, México D.F, 09340, México;(3) Ion Beam Laboratory, Shanghai Institute of Metallurgy, Chinese Academy of Sciences, 865 Chang Ning Road, Shanghai, 200050, People's Republic of China |
| Abstract: | The mechanisms that give rise to the broadening and the shifts of the Raman peaks of titanium dioxide and lead titanate nanocrystals prepared by sol-gel are discussed. Phonon confinement and oxygen deficiency are competitive mechanisms in TiO2 obtained by different sol-gel preparations whereas pressure effects on the nanocrystals predominate in ferroelectric PbTiO3. |
| Keywords: | Raman TiO2 PbTiO3-nanocrystals |
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