Abstract
Abstract:
Reaction between Eu(NO3)3 and NH4F in aqueous media was applied to produce EuF3 doughnut-like aggregates with a diameter of 200-500 nm and thickness of 50-150 nm composed of nanoparticles with a mean diameter of 16 nm. The impregnation, sorption and mechanochemical treatment were used for surface modification of EuF3 doughnut-like particles with 1,10-phenanthroline and sodium dibenzoylmethanate which are sensitizing ligands for Eu3+ luminescence. The data of transmission electron microscopy, elemental analysis, Fourier transform infrared spectroscopy, and luminescence spectroscopy have proved that the organic ligands are coordinated to surface Eu3+ ions, forming surface complexes. The surface modification of the EuF3 nanoparticles with sodium dibenzoylmethanate and 1,10-phenanthroline leads to increase in the luminescence intensity at 612 nm (5D0 → 7F2 transition) in comparison with the luminescence intensity of the unmodified EuF3 nanoparticles. Energy transfer from the ligand to Eu3+ ion in the surface complexes makes a main contribution to this effect.
Notes:
Physics and materials science<br><br>Physics of condensed state: electronic structure, electrical, magnetic and optical properties<br><br>Physics of condensed state: structure, mechanical and thermal properties
Details
Format:
Academic Journal
Database:
PASCAL Archive
Journal:
Applied surface science
Volume:
307
Page Start:
482
Page Count:
7
ISSN:
01694332
Publisher:
Amsterdam: Elsevier, 2014.
Document Type:
Article
Physical Description:
print, 48 ref
