Redox-induced reversible luminescence switching of cerium-doped upconversion nanoparticles
Redox-induced reversible luminescence switching of cerium-doped upconversion nanoparticles
复制标题
氧化还原诱导的掺铈上转换纳米粒子的可逆发光开关
DOI：
10.1016/j.jlumin.2015.12.040
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发表时间：
2016-05-01
影响因子：
3.6
通讯作者：
Lin, Hongzhen
中科院分区：
文献类型：
--
作者：
Huang, Yanan;Xiao, Qingbo;Lin, Hongzhen
智能上转换纳米荧光粉（UCNPs），可以在两个或两个以上的发光状态之间可逆地切换由某些外部刺激引起了相当大的关注，由于其在生物应用的巨大潜力。在这里，我们首次报道了一种类型的氧化还原开关UCNPs共掺杂NaGdF 4：Yb/Er纳米棒与氧化还原活性的Ce 3 +/Ce 4+离子对。观察到它们的UC发光强度的可逆切换时，周围的氧化还原环境的变化。我们展示了坚实的证据，发光开关是由NaGdF 4主机晶体结构的剪裁响应于改变氧化还原状态的共掺杂铈离子。一个概念验证的例子，进一步证明了通过使用这些UCNPs探测生物组织中的氧化还原环境的动态变化。(C)2016爱思唯尔B. V.保留所有权利。
Smart upconversion nanophosphors (UCNPs) that can be reversibly switched between two or more luminescent states by certain external stimuli have attracted considerable attention due to their great potential in biological applications. Here we report for the first time a type of redox-switchable UCNPs by codoping NaGdF4:Yb/Er nanorods with the redox-active Ce3+/Ce4+ ion pairs. A reversible switching of their UC luminescence intensity was observed upon the variation of the surrounding redox environments. We show solid proof that the luminescence switching is caused by the tailoring of the NaGdF4 host crystal structure in response to changing redox state of the codoped cerium ions. A proof-of-concept example is further demonstrated by using these UCNPs for probing the dynamical variation of redox environments in biological tissues. (C) 2016 Elsevier B.V. All rights reserved.