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Raman scattering study on anatase TiO2nanocrystals

Journal of Physics D Applied Physics · 2000 · Vol. 33(8) · pp. 912–916

W F Zhang✉(Nanjing University)Yi He(Nanjing University)M S Zhang(Nanjing University)Zhen Yin(Nanjing University)Qiang Chen(Nanjing University)

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Abstract

Titanium dioxide (TiO 2 ) nanocrystals are prepared by a hydrolysis process of tetrabutyl titanate. Nanocrystal samples with various sizes of 6.8-27.9 nm are obtained after annealing from 100 to 650 °C. The crystal structures and the average particle sizes are examined using x-ray diffraction. Raman scattering was employed to investigate the evolution of the anatase phase in the nanocrystals during annealing. Phonon confinement and non-stoichiometry effects are responsible for the blueshift and broadening of the lowest-frequency E g Raman mode. The influence of interfacial vibrations on the Raman linewidth is also discussed.

Electronic and Structural Properties of Oxides Quantum Dots Synthesis And Properties TiO2 Photocatalysis and Solar CellsAnataseNanocrystalRaman spectroscopyMaterials scienceRaman scatteringLaser linewidthAnnealing (glass)Orthorhombic crystal systemTitanateParticle size

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