TITLE

Fluorescence enhancement and quenching of Eu3+ ions by Au–ZnO core-shell and Au nanoparticles

AUTHOR(S)
Haldar, Krishna Kanta; Patra, Amitava
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/10/2009, Vol. 95 Issue 6, p063103
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We investigate the enhancement and quenching of Eu3+ emission in presence of Au–ZnO core-shell nanoparticles and Au nanoparticles. The quenching of Eu3+-emission in presence of Au nanoparticles is caused by change of nonradiative rate due to energy transfer. However, the enhancement of Eu3+-emission in presence of Au–ZnO core-shell nanoparticles is due to local field, which modifies the radiative and nonradiative rate. Enhancement and quenching of Eu3+ emission reflect the change in environment of Eu3+ from Au nanoparticles to Au–ZnO core-shell nanoparticles which is confirmed by the Judd–Ofelt parameter (Ω2) analysis.
ACCESSION #
43720446

 

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