Preparation of luminescent inorganic core/shell-structured nanoparticles

Autor: Sofia Dembski, Sabine Rupp, Andres Osvet, Miroslaw Batentschuk, Moritz Milde, Albrecht Winnacker, Carsten Gellermann, Gerhard Sextl
Rok vydání: 2011
Předmět:
Zdroj: MRS Proceedings. 1342
ISSN: 1946-4274
0272-9172
DOI: 10.1557/opl.2011.781
Popis: 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.
Databáze: OpenAIRE
Externí odkaz: