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

J. Q. Xu; S. J. Xiong; X. L. Wu; T. H. Li; J. C. Shen; Paul K. Chu

doi:10.1063/1.4820465

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

J. Q. Xu
, S. J. Xiong
, X. L. Wu
, T. H. Li
, J. C. Shen
, Paul K. Chu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

31 Citations (Scopus)

79 Downloads (CityUHK Scholars)

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⁺-O^2- 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.

Original language	English
Article number	93512
Journal	Journal of Applied Physics
Volume	114
Issue number	9
DOIs	https://doi.org/10.1063/1.4820465
Publication status	Published - 7 Sept 2013

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in J. Q. Xu, S. J. Xiong, X. L. Wu, T. H. Li, J. C. Shen, and Paul K. Chu , "Investigation of activated oxygen molecules on the surface of Y2O3 nanocrystals by Raman scattering", Journal of Applied Physics 114, 093512 (2013) and may be found at https://doi.org/10.1063/1.4820465.

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@article{56ed51117192453db67d50608a98f959,

title = "Investigation of activated oxygen molecules on the surface of Y 2O3 nanocrystals by Raman scattering",

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. {\textcopyright} 2013 AIP Publishing LLC.",

author = "Xu, \{J. Q.\} and Xiong, \{S. J.\} and Wu, \{X. L.\} and Li, \{T. H.\} and Shen, \{J. C.\} and Chu, \{Paul K.\}",

year = "2013",

month = sep,

day = "7",

doi = "10.1063/1.4820465",

language = "English",

volume = "114",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "9",

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TY - JOUR

T1 - Investigation of activated oxygen molecules on the surface of Y 2O3 nanocrystals by Raman scattering

AU - Xu, J. Q.

AU - Xiong, S. J.

AU - Wu, X. L.

AU - Li, T. H.

AU - Shen, J. C.

AU - Chu, Paul K.

PY - 2013/9/7

Y1 - 2013/9/7

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84884950304

UR - https://www.scopus.com/pages/publications/84884950304#tab=impact

U2 - 10.1063/1.4820465

DO - 10.1063/1.4820465

M3 - RGC 21 - Publication in refereed journal

SN - 0021-8979

VL - 114

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 9

M1 - 93512

ER -