Investigation of activated oxygen molecules on the surface of Y 2O3 nanocrystals by Raman scattering

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

15 Scopus Citations
View graph of relations

Author(s)

  • J. Q. Xu
  • S. J. Xiong
  • X. L. Wu
  • T. H. Li
  • J. C. Shen

Detail(s)

Original languageEnglish
Article number93512
Journal / PublicationJournal of Applied Physics
Volume114
Issue number9
Publication statusPublished - 7 Sep 2013

Abstract

Activation of surface oxygen molecules on cubic Y2O3 nanocrystals (NCs) is investigated. As the annealing temperature under O 2 is increased, the strong Raman band at 965 cm-1 previously never assigned weakens gradually, while the intensity of the 378 cm-1 Raman band arising from Y3+-O2- vibration increases. X-ray diffraction reveals no structural change during annealing and energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and theoretical calculation suggest that the interstitial oxygen O2 2- connected to the F centers gives rise to the 965 cm-1 Raman band. The results provide direct evidence of the existence of activated oxygen ions on Y2O3 NCs. © 2013 AIP Publishing LLC.

Citation Format(s)

Investigation of activated oxygen molecules on the surface of Y 2O3 nanocrystals by Raman scattering. / Xu, J. Q.; Xiong, S. J.; Wu, X. L.; Li, T. H.; Shen, J. C.; Chu, Paul K.

In: Journal of Applied Physics, Vol. 114, No. 9, 93512, 07.09.2013.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal