Investigation of activated oxygen molecules on the surface of Y{sub 2}O{sub 3} nanocrystals by Raman scattering

Journal Article · Sat Sep 07 00:00:00 EDT 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4820465· OSTI ID:22218112

Xu, J. Q.; Xiong, S. J.; Wu, X. L.; Shen, J. C. ^[1]; Li, T. H. ^[1]; Chu, Paul K. ^[2]

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1. Laboratory of Modern Acoustics, MOE, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093 (China)
2. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (China)

Activation of surface oxygen molecules on cubic Y{sub 2}O{sub 3} nanocrystals (NCs) is investigated. As the annealing temperature under O{sub 2} is increased, the strong Raman band at 965 cm{sup −1} previously never assigned weakens gradually, while the intensity of the 378 cm{sup −1} Raman band arising from Y{sup 3+}-O{sup 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 O{sub 2}{sup 2−} connected to the F centers gives rise to the 965 cm{sup −1} Raman band. The results provide direct evidence of the existence of activated oxygen ions on Y{sub 2}O{sub 3} NCs.

• OSTI ID: 22218112
• Journal Information: Journal of Applied Physics, Vol. 114, Issue 9; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ADMINISTRATIVE PROCEDURES
ANNEALING
F CENTERS
INTERSTITIALS
MOLECULES
NANOSTRUCTURES
OXYGEN
OXYGEN IONS
RAMAN EFFECT
RAMAN SPECTRA
SURFACES
X RADIATION
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
X-RAY SPECTROSCOPY
YTTRIUM IONS
YTTRIUM OXIDES