Abstract
The large Stokes shifts and long lifetimes observed for lanthanide complexes are especially important for bioimaging. To incorporate the benefits of lanthanide lumophores into nanoscale probes, size-tunable gold nanoparticles (GNPs) coated with luminescent europium(III) complexes were synthesized using a modified Stober method with in␣situ doping of europium(III) complexes with tri-n-octylphosphineoxide (TOPO) and naphthoyl trifluoroacetone (NTA) ligands. The results show that the integration of europium(III) complexes with GNPs significantly extends their absorption band towards the visible region. Emission spectrum of these GNPs coated with europium(III) complexes shows the characteristic 5D0 → 7F n (n = 1, 2, 3, 4) transitions of an Eu(III) ion. Their fluorescence lifetime of 460 μs was observed. The effect of different sizes of GNPs on their photophysical properties was also investigated.
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Acknowledgement
This research is funded by the Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant Number 103.06-2011.52. We would like to thank the National Key Lab of Electronic Materials and Devices, Institute of Materials Science (IMS), Vietnam Academy of Science and Technology (VAST).
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Khuyen, H.T., Huong, T.T., Tung, D.K. et al. Study of a Strong Luminescent Core Shell Nanocomposite of Europium Complex Coated on Gold Nanoparticles: Synthesis and Properties. J. Electron. Mater. 45, 4400–4406 (2016). https://doi.org/10.1007/s11664-016-4583-5
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DOI: https://doi.org/10.1007/s11664-016-4583-5