Abstract

We believe that, for the first time, the UV-visible optical reflectivity of nanocrystalline ceria with various particle sizes has been measured, and their optical absorption characteristics have been studied by Kramers–Kronig transformation. The wide absorption band in the 200–480-nm range consisted of two narrow bands. This wide band was designated as the charge transfer of O2p–Ce4f while both narrow bands, which overlapped in this wide band, were due to the well-known 2 F 5/22 F 7/2 spin-orbit splitting of the Ce 4f 1 state. With a decrease in the particle sizes of the samples, the bandwidth expanded distinctly and a red shift in the wide band was observed. On the other hand, the band gap between the narrow bands showed a remarkable increase. All of these phenomena resulted from the effects of quantum size and the interface of nanostructured materials.

© 1997 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. Y. Wang, N. Herron, “Nanometer-sized semiconductor clusters: materials synthesis, quantum size effects, and photophysical properties,” J. Phys. Chem. 95, 525–532 (1991).
    [CrossRef]
  2. L. Zhang, J. M. Mou, Nanostructured Materials (Liaoling Science Press, Shengyang, 1994), p. 26.
  3. T. He, P. Wang, X. Zhang, F. Liu, “The quantum size effects of AgBr semiconductor ultrafine particles,” Chinese J. Chem. Phys. 8(1), 23–27 (1995).
  4. F. Marabelli, P. Wachter, “Covalent insulator CeO2: optical reflectivity measurements,” Phys. Rev. B 36, 1238–1243 (1987).
    [CrossRef]
  5. E. Wuilloud, B. Delley, W. D. Schneider, Y. Baer, “Spectroscopic evidence for localized and extended f-symmetry states in CeO2,” Phys. Rev. Lett. 53, 202–205 (1984).
    [CrossRef]
  6. D. D. Koelling, A. M. Boring, J. H. Wood, “The electronic structure of CeO2 and PrO2,” Solid State Commun. 47, 227–232 (1983).
    [CrossRef]

1995

T. He, P. Wang, X. Zhang, F. Liu, “The quantum size effects of AgBr semiconductor ultrafine particles,” Chinese J. Chem. Phys. 8(1), 23–27 (1995).

1991

Y. Wang, N. Herron, “Nanometer-sized semiconductor clusters: materials synthesis, quantum size effects, and photophysical properties,” J. Phys. Chem. 95, 525–532 (1991).
[CrossRef]

1987

F. Marabelli, P. Wachter, “Covalent insulator CeO2: optical reflectivity measurements,” Phys. Rev. B 36, 1238–1243 (1987).
[CrossRef]

1984

E. Wuilloud, B. Delley, W. D. Schneider, Y. Baer, “Spectroscopic evidence for localized and extended f-symmetry states in CeO2,” Phys. Rev. Lett. 53, 202–205 (1984).
[CrossRef]

1983

D. D. Koelling, A. M. Boring, J. H. Wood, “The electronic structure of CeO2 and PrO2,” Solid State Commun. 47, 227–232 (1983).
[CrossRef]

Baer, Y.

E. Wuilloud, B. Delley, W. D. Schneider, Y. Baer, “Spectroscopic evidence for localized and extended f-symmetry states in CeO2,” Phys. Rev. Lett. 53, 202–205 (1984).
[CrossRef]

Boring, A. M.

D. D. Koelling, A. M. Boring, J. H. Wood, “The electronic structure of CeO2 and PrO2,” Solid State Commun. 47, 227–232 (1983).
[CrossRef]

Delley, B.

E. Wuilloud, B. Delley, W. D. Schneider, Y. Baer, “Spectroscopic evidence for localized and extended f-symmetry states in CeO2,” Phys. Rev. Lett. 53, 202–205 (1984).
[CrossRef]

He, T.

T. He, P. Wang, X. Zhang, F. Liu, “The quantum size effects of AgBr semiconductor ultrafine particles,” Chinese J. Chem. Phys. 8(1), 23–27 (1995).

Herron, N.

Y. Wang, N. Herron, “Nanometer-sized semiconductor clusters: materials synthesis, quantum size effects, and photophysical properties,” J. Phys. Chem. 95, 525–532 (1991).
[CrossRef]

Koelling, D. D.

D. D. Koelling, A. M. Boring, J. H. Wood, “The electronic structure of CeO2 and PrO2,” Solid State Commun. 47, 227–232 (1983).
[CrossRef]

Liu, F.

T. He, P. Wang, X. Zhang, F. Liu, “The quantum size effects of AgBr semiconductor ultrafine particles,” Chinese J. Chem. Phys. 8(1), 23–27 (1995).

Marabelli, F.

F. Marabelli, P. Wachter, “Covalent insulator CeO2: optical reflectivity measurements,” Phys. Rev. B 36, 1238–1243 (1987).
[CrossRef]

Mou, J. M.

L. Zhang, J. M. Mou, Nanostructured Materials (Liaoling Science Press, Shengyang, 1994), p. 26.

Schneider, W. D.

E. Wuilloud, B. Delley, W. D. Schneider, Y. Baer, “Spectroscopic evidence for localized and extended f-symmetry states in CeO2,” Phys. Rev. Lett. 53, 202–205 (1984).
[CrossRef]

Wachter, P.

F. Marabelli, P. Wachter, “Covalent insulator CeO2: optical reflectivity measurements,” Phys. Rev. B 36, 1238–1243 (1987).
[CrossRef]

Wang, P.

T. He, P. Wang, X. Zhang, F. Liu, “The quantum size effects of AgBr semiconductor ultrafine particles,” Chinese J. Chem. Phys. 8(1), 23–27 (1995).

Wang, Y.

Y. Wang, N. Herron, “Nanometer-sized semiconductor clusters: materials synthesis, quantum size effects, and photophysical properties,” J. Phys. Chem. 95, 525–532 (1991).
[CrossRef]

Wood, J. H.

D. D. Koelling, A. M. Boring, J. H. Wood, “The electronic structure of CeO2 and PrO2,” Solid State Commun. 47, 227–232 (1983).
[CrossRef]

Wuilloud, E.

E. Wuilloud, B. Delley, W. D. Schneider, Y. Baer, “Spectroscopic evidence for localized and extended f-symmetry states in CeO2,” Phys. Rev. Lett. 53, 202–205 (1984).
[CrossRef]

Zhang, L.

L. Zhang, J. M. Mou, Nanostructured Materials (Liaoling Science Press, Shengyang, 1994), p. 26.

Zhang, X.

T. He, P. Wang, X. Zhang, F. Liu, “The quantum size effects of AgBr semiconductor ultrafine particles,” Chinese J. Chem. Phys. 8(1), 23–27 (1995).

Chinese J. Chem. Phys.

T. He, P. Wang, X. Zhang, F. Liu, “The quantum size effects of AgBr semiconductor ultrafine particles,” Chinese J. Chem. Phys. 8(1), 23–27 (1995).

J. Phys. Chem.

Y. Wang, N. Herron, “Nanometer-sized semiconductor clusters: materials synthesis, quantum size effects, and photophysical properties,” J. Phys. Chem. 95, 525–532 (1991).
[CrossRef]

Phys. Rev. B

F. Marabelli, P. Wachter, “Covalent insulator CeO2: optical reflectivity measurements,” Phys. Rev. B 36, 1238–1243 (1987).
[CrossRef]

Phys. Rev. Lett.

E. Wuilloud, B. Delley, W. D. Schneider, Y. Baer, “Spectroscopic evidence for localized and extended f-symmetry states in CeO2,” Phys. Rev. Lett. 53, 202–205 (1984).
[CrossRef]

Solid State Commun.

D. D. Koelling, A. M. Boring, J. H. Wood, “The electronic structure of CeO2 and PrO2,” Solid State Commun. 47, 227–232 (1983).
[CrossRef]

Other

L. Zhang, J. M. Mou, Nanostructured Materials (Liaoling Science Press, Shengyang, 1994), p. 26.

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (3)

Fig. 1
Fig. 1

Optical reflectivity of nanocrystalline ceria with various particle sizes: A, 3 nm; B, 15 nm; C, 30 nm.

Fig. 2
Fig. 2

Dielectric function ε of 3-nm ceria: ε1, the real part of ε; ε2, the imaginary part of ε.

Fig. 3
Fig. 3

Comparison of ε with the XPS-BIS spectrum: a, XPS-BIS spectrum of single-crystal ceria; b, ε2 of single-crystal ceria; c, ε2 of 3-nm ceria.

Equations (1)

Equations on this page are rendered with MathJax. Learn more.

ΔE=2π22R21me+1mh-1.786e2εR-0.248ERy*,

Metrics