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

作者：Chen, Hong-Qi; Yuan, Fei; Wang, Shao-Zhen; Xu, Juan; Zhang, Yi-Yan; Wang, Lun^*

来源：Analyst, 2013, 138(8): 2392-2397.

DOI：10.1039/c3an36921h

• UP-CONVERSION
• GOLD NANORODS
• PLASMONIC DETECTION
• AQUEOUS-SOLUTION
• NANOCRYSTALS
• LUMINESCENCE
• GROWTH
• MERCURY(II)
• PHOSPHORS
• SENSORS

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.

• 出版日期2013
• 单位安徽师范大学