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Optically Stable Biocompatible Flame-made SiO2-coated Y2O3:Tb3+ Nanophosphors for Cell Imaging

Published online by Cambridge University Press:  12 September 2013

G.A. Sotiriou ,
D. Franco ,
D. Poulikakos  and
A. Ferrari
G.A. Sotiriou
Affiliation:
Particle Technology Laboratory, [email protected]
D. Franco
Affiliation:
Laboratory of Thermodynamics in Emerging Technologies, [email protected] of Mechanical and Process Engineering Swiss Federal Institute of Technology (ETH Zurich) Sonneggstrasse 3, CH-9092, Zurich, Switzerland
D. Poulikakos
Affiliation:
Laboratory of Thermodynamics in Emerging Technologies, [email protected] of Mechanical and Process Engineering Swiss Federal Institute of Technology (ETH Zurich) Sonneggstrasse 3, CH-9092, Zurich, Switzerland
A. Ferrari
Affiliation:
Laboratory of Thermodynamics in Emerging Technologies, [email protected] of Mechanical and Process Engineering Swiss Federal Institute of Technology (ETH Zurich) Sonneggstrasse 3, CH-9092, Zurich, Switzerland
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Abstract

Nanophosphors are a promising new class of inorganic labels for bio-imaging applications, possessing a narrow emission bandwidth, good photostability and low toxicity. The effect of crystallinity of the host matrix on the phosphorescence of Tb-doped (1-5 at% Tb) Y2O3 nanophosphors is explored. Nanophosphors with different crystal phase (cubic and monoclinic) and morphology (uncoated and SiO2-coated) but with similar sizes were prepared by flame spray synthesis. That allowed the direct comparison of their phosphorescence performance excluding any observed size effect. The as prepared nanophosphors were characterized by X-ray diffraction, high resolution electron microscopy and photoluminescence spectroscopy. The meta-stable monoclinic crystal structure of Y2O3:Tb3+ nanophosphors favors their green phosphorescence.

Keywords

nanostructureoptical propertiesoxide
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1506: Symposium Y – Combustion Synthesis of Functional Nanomaterials , 2013 , mrsf12-1506-y03-05
Copyright
Copyright © Materials Research Society 2013 

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References

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