Enhancing upconversion luminescence of NaYF 4 :Yb/Er nanocrystals by Mo 3+ doping and their application in bioimaging

作者：Dongguang Yin, Chengcheng Wang, Juan Ouyang, Kailin Song, Bing Liu, Xianzhang Cao, Lu Zhang, Yanlin Han, Long Xie, Minghong Wu · 发表于：Dalton Transactions · 年份：2014 · DOI：10.1039/c4dt00172a · 被引用次数：77 · 研究领域：Luminescence Properties of Advanced Materials、Atomic and Subatomic Physics Research、Radiation Detection and Scintillator Technologies

Enhancement of upconversion luminescence is imperative for the applications of upconversion nanocrystals (UCNs). In this work, we investigated the upconversion luminescence enhancement of NaYF4:Yb/Er by Mo(3+) ion doping. It was found that the upconversion luminescence intensities of the green and red emissions of UCNs co-doped with 10 mol% Mo(3+) ions were enhanced by 6 and 8 times, respectively. This enhancement offers a potential increase in the overall detectability of upconversion nanocrystals. HeLa cell imaging using NaYF4:Yb/Er/Mo as luminescent probes showed bright upconversion fluorescence. Moreover, the Mo(3+) doping endowed the UCNs with excellent paramagnetic behavior. It is expected that the as-prepared UCNs with a high upconversion luminescence and excellent paramagnetic properties could be promising bi-functional nanoprobes for sensitive multi-modal bioimaging and other optical applications.