DOI: 10.1063/1.372016. Blue shift in ultraviolet absorption spectra of monodisperse CeO2−x nanoparticles

Blue shift in ultraviolet absorption spectra of monodisperse CeO2−x nanoparticles

10.1063/1.372016

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

Blue shifts corresponding to the absorption edge in the UV-A (310–400 nm) range are obtained from ultraviolet (UV) absorption spectra of monodisperse CeO2−x (0&lt;x&lt;0.5) nanoparticles, which are produced as toluene suspensions by a successive microemulsification method. The blue shift of the nanoparticles is inversely proportional to the 2.2 power of the particle size for a direct transition, but no relation is found for an indirect transition. In contrast, the shift for thin films of 100–200 nm thickness exhibits a relation nearly inverse proportional to the square root of the thickness for the direct transition. These relations are different from that for the quantum size effect, though the difference is small for the nanoparticles. A possible explanation for the blue shift is a valence change of the Ce ions.

Bibliography

Tsunekawa, S., Fukuda, T., & Kasuya, A. (2000). Blue shift in ultraviolet absorption spectra of monodisperse CeO2âx nanoparticles. Journal of Applied Physics, 87(3), 1318â1321.

Authors 3

S. Tsunekawa (first)
T. Fukuda (additional)
A. Kasuya (additional)

References 19 Referenced 667

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{'key': '2024020620291839900_r2'}
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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:26 a.m.)
Deposited	1 year, 6 months ago (Feb. 6, 2024, 7:15 p.m.)
Indexed	3 days ago (Aug. 27, 2025, 12:27 p.m.)
Issued	25 years, 6 months ago (Feb. 1, 2000)
Published	25 years, 6 months ago (Feb. 1, 2000)
Published Print	25 years, 6 months ago (Feb. 1, 2000)

Funders 0

None

BibTeX

@article{Tsunekawa_2000, title={Blue shift in ultraviolet absorption spectra of monodisperse CeO2−x nanoparticles}, volume={87}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.372016}, DOI={10.1063/1.372016}, number={3}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Tsunekawa, S. and Fukuda, T. and Kasuya, A.}, year={2000}, month=feb, pages={1318–1321} }

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