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Structural characterization of TiO2 nanopowders by Raman spectroscopy

Published online by Cambridge University Press:  28 April 2015

Sergey Mamedov
Sergey Mamedov*
Affiliation:
Horiba Scientific, 3880 Park Ave, Edison, NJ 08820 U.S.A.
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Abstract

TiO2 nanopowders obtained using different methods with the mean size of 5, 15, and 30 nm have been investigated by Raman spectroscopy in wide spectral range. Nano-size of TiO2 crystals lead to a shift and broadening of the first-order Raman lines through a relaxation of the q = 0 selection rule and effects on to the position, width and asymmetry of a Raman bands. The details of the evolution of the 142.9 cm-1 Raman line shape on the size and distributions of the nanopowders are presented and discussed in frame of confined phonons model. Analysis of Raman spectra shows that structural characteristics of nanopowders may be different even size of the nanopowders is the same. Structural features of the material depend on preparation methods/conditions and can be extracted from Raman spectra of the material.

Keywords

Raman spectroscopynanostructureoxide
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1806: Symposium UU – Titanium Oxides―From Fundamental Understanding to Applications , 2015 , pp. 1 - 6
Copyright
Copyright © Materials Research Society 2015 

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References

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