Identification of oxygen vacancy types from Raman spectra of SnO2 nanocrystals
- 20 July 2012
- journal article
- research article
- Published by Wiley in Journal of Raman Spectroscopy
- Vol. 43 (10) , 1423-1426
Abstract
Raman spectra acquired from spherical SnO2 nanocrystals prepared by pulsed laser ablation and hydrothermal synthesis exhibit three oxygen‐vacancy‐related Raman modes at 234, 573, and 618 cm−1. The peak location and intensity vary with annealing temperature under O2 finally approaching those of bulk materials. Density functional calculation discloses that the three Raman modes stem from subbridging, in‐plane, and bridging oxygen vacancies, respectively. Raman spectra can thus be used to discern different types of oxygen vacancies in SnO2 nanocrystals. Copyright © 2012 John Wiley & Sons, Ltd.Keywords
Funding Information
- National Natural Science Foundation and Basic Research Programs of China (2011CB922102, 60976063)
- Postdoctoral Science Foundation of China and Jiangsu Province (2011M500889, 1102001B)
- Hong Kong Research Grants Council (CityU 112510)
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