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Core/Shell Composite of Self-Assembled Hierarchical Bismuth Oxide/Europium Doped Gadolinium Oxide for Scintillating Detection

Published online by Cambridge University Press:  31 January 2011

Teng-Kuan Tseng
Affiliation:
tengkuan.uf@gmail.com, University of Florida, Departement of Materials Science and Engineering, 100 Rhines Hall, P.O. Box 116400, University of Florida,Departement of Materials Science and Engineering,, Gainesville, Florida, 32611-6400, United States, (352)846-3332, (352)392-4911
Jihun Choi
Affiliation:
soulove2@ufl.edu, University of Florida, Department of Materials Science and Engineering, Gainesville, Florida, United States
Mark Davidson
Affiliation:
mark@microfab.ufl.edu, University of Florida, MICROFABRITECH, Gainesville, Florida, United States
Paul H Holloway
Affiliation:
pholl@mse.ufl.edu, University of Florida, Department of Materials Science and Engineering, Gainesville, Florida, United States
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Abstract

A novel three dimensional (3D) self-assembled hierarchical bismuth oxide was prepared via a sol-gel synthesis with the aid of capping agent of polyethylene glycol-8000 (PEG-8000) at 85 ℃ in 45 min. The morphology evolution was studied versus reaction time and interpreted in terms of growth mechanisms. The as-grown 3D hierarchical flower-like bismuth oxide was crystalline cubic gamma-phase. The morphology and crystal phase of these 3D cubic gamma-phase bismuth oxide flowers were not changed with heating up to 600 ℃. The flower-like morphology was attributed to modification of the growth kinetics by the capping agent from the PEG-OH bond bridging with bismuth ions. Europium doped gadolinium oxide shell were further deposited on the bismuth oxide cores through sol-gel synthesis showing good photoluminescence characteristics at 610 and 622 nm under the excitation at 280 nm.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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