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Preparation of luminescent inorganic core/shell-structured nanoparticles

Published online by Cambridge University Press:  23 May 2011

Moritz Milde ,
Sofia Dembski ,
Sabine Rupp ,
Carsten Gellermann ,
Gerhard Sextl ,
Miroslaw Batentschuk ,
Andres Osvet  and
Albrecht Winnacker
Moritz Milde
Affiliation:
Fraunhofer Institute for Silicate Research, Neunerplatz 2, 97082 Wuerzburg, Germany
Sofia Dembski
Affiliation:
Fraunhofer Institute for Silicate Research, Neunerplatz 2, 97082 Wuerzburg, Germany
Sabine Rupp
Affiliation:
Fraunhofer Institute for Silicate Research, Neunerplatz 2, 97082 Wuerzburg, Germany
Carsten Gellermann
Affiliation:
Fraunhofer Institute for Silicate Research, Neunerplatz 2, 97082 Wuerzburg, Germany
Gerhard Sextl
Affiliation:
Fraunhofer Institute for Silicate Research, Neunerplatz 2, 97082 Wuerzburg, Germany Department of Chemical Technology of Materials Synthesis, University of Wuerzburg, Roentgenring 11, 97070 Wuerzburg
Miroslaw Batentschuk
Affiliation:
Chair WW6 Materials for Electronics and Energy Technology (i-MEET), University of Erlangen-Nuremberg, Martensstr. 7, 91058 Erlangen, Germany
Andres Osvet
Affiliation:
Chair WW6 Materials for Electronics and Energy Technology (i-MEET), University of Erlangen-Nuremberg, Martensstr. 7, 91058 Erlangen, Germany
Albrecht Winnacker
Affiliation:
Chair WW6 Materials for Electronics and Energy Technology (i-MEET), University of Erlangen-Nuremberg, Martensstr. 7, 91058 Erlangen, Germany
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Abstract

SiO2 nanoparticles (NPs) were coated with Eu3+-doped calcium phosphate (CP) and Mn2+-doped ZnO to give Zn2SiO4 via a modified Pechini sol-gel process. Annealing at high temperatures resulted in NPs with an amorphous core and a crystalline luminescent shell. It was shown that this procedure can be applied to silica cores with diameters below 300 nm. By transmission electron microscopy, elemental analysis and from X-ray diffraction patterns it was determined that shell composition and structure are influenced by the annealing temperature and pH of the coating solution. Measurements of photoluminescence intensities displayed their dependency on the concentration of dopant in the resulting core/shell NPs.

Keywords

sol-gelcore/shelloptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1342: Symposium V – Rare-Earth Doping of Advanced Materials for Photonic Applications , 2011 , mrss11-1342-v03-17
Copyright
Copyright © Materials Research Society 2011

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References

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