Near-infrared to near-infrared upconverting NaYF4:Yb3+,Tm3+ nanoparticles-aptamer-Au nanorods light resonance energy transfer system for the detection of mercuric(ii) ions in solution
Literature Information
Publication Date
2013-02-07
DOI
10.1039/C3AN36921H
Impact Factor
4.616
Authors
Hong-Qi Chen, Fei Yuan, Shao-Zhen Wang, Juan Xu, Yi-Yan Zhang, Lun Wang
View Original
Abstract
A new luminescence resonant energy transfer (LRET) system has been designed that utilizes near-infrared (NIR)-to-NIR upconversion lanthanide nanophosphors (UCNPs) as the donor, and Au nanorods (Au NRs) as the acceptor. The UCNPs were excited by a near-infrared (980 nm) wavelength and also emitted at a near-infrared wavelength (804 nm) using an inexpensive infrared continuous wave laser diode. The Au NRs showed a high absorption band around 806 nm, which provided large spectral overlap between the donor and the acceptor. Hg2+ ions were added to an aqueous solution containing the UCNPs and Au NRs that were modified with a Hg2+ aptamer. Then, a sandwich-type LRET system was developed for the detection of Hg2+ ions that had high sensitivity and selectivity in the NIR region. The method was successfully applied to the sensing of Hg2+ ions in water and human serum samples.
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2-Methyl 1-(2-methyl-2-propanyl) (2S)-3,3-dimethyl-4-oxo-1,2-pyrrolidinedicarboxylate
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