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Proceedings Paper

Plasmonic Ag/SiO2 composite nanoparticles doped with europium chelate and their metal enhanced fluorescence
Author(s): Wei Deng; Dayong Jin; Krystyna Drozdowicz-Tomsia; Jingli Yuan; Jing Wu; Ewa M. Goldys
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Paper Abstract

We report silver nanostructure-enhanced fluorescence of a europium (Eu) chelate, BHHCT-Eu-DPBT, which was covalently bound in Ag/SiO2 nanocomposites. This design enhances the europium signal intensity by more than one order of magnitude, and accelerates the decay time from 0.3 ms down to 60 microseconds, at low excitation conditions. These nanocomposites were bright enough to be observed in time-gated fluorescence microscopy under 365 nm LED excitation. The increased brightness and reduced lifetime of such fluorescent core-shell nanocomposites will enhance their applicability for ultrasensitive bioassays and bioimaging, especially with time-gating.

Paper Details

Date Published: 11 February 2011
PDF: 11 pages
Proc. SPIE 7909, Colloidal Quantum Dots/Nanocrystals for Biomedical Applications VI, 79090Z (11 February 2011); doi: 10.1117/12.872833
Show Author Affiliations
Wei Deng, Macquarie Univ. (Australia)
Dayong Jin, Macquarie Univ. (Australia)
Krystyna Drozdowicz-Tomsia, Macquarie Univ. (Australia)
Jingli Yuan, Dalian Univ. of Technology (China)
Jing Wu, Dalian Univ. of Technology (China)
Ewa M. Goldys, Macquarie Univ. (Australia)

Published in SPIE Proceedings Vol. 7909:
Colloidal Quantum Dots/Nanocrystals for Biomedical Applications VI
Wolfgang J. Parak; Kenji Yamamoto; Marek Osinski, Editor(s)

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