Plasmonic Ag/SiO2 composite nanoparticles doped with europium chelate and their metal enhanced fluorescence

Wei Deng; Dayong Jin; Krystyna Drozdowicz-Tomsia; Jingli Yuan; Jing Wu; Ewa M. Goldys

doi:10.1117/12.872833

11 February 2011 Plasmonic Ag/SiO₂ composite nanoparticles doped with europium chelate and their metal enhanced fluorescence

Wei Deng, Dayong Jin, Krystyna Drozdowicz-Tomsia, Jingli Yuan, Jing Wu, Ewa M. Goldys

Author Affiliations +

Proceedings Volume 7909, Colloidal Quantum Dots/Nanocrystals for Biomedical Applications VI; 79090Z (2011) https://doi.org/10.1117/12.872833
Event: SPIE BiOS, 2011, San Francisco, California, United States

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.

Citation Download Citation

Wei Deng, Dayong Jin, Krystyna Drozdowicz-Tomsia, Jingli Yuan, Jing Wu, and Ewa M. Goldys "Plasmonic Ag/SiO₂ composite nanoparticles doped with europium chelate and their metal enhanced fluorescence", Proc. SPIE 7909, Colloidal Quantum Dots/Nanocrystals for Biomedical Applications VI, 79090Z (11 February 2011); https://doi.org/10.1117/12.872833

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