Redox-induced reversible luminescence switching of cerium-doped upconversion nanoparticles
文献类型： 外文期刊
作者： Huang, Yanan 1 ; Xiao, Qingbo 2 ; Wang, Jian 1 ; Xi, Yonglan 3 ; Li, Fujin 2 ; Feng, Yamin 1 ; Shi, Liyi 1 ; Lin, Hongzhe 1 ;
作者机构： 1.Shanghai Univ, Coll Sci, Shanghai 200444, Peoples R China
2.Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion SINANO, Int Lab Adapt Bionanotechnol, Suzhou 215123, Peoples R China
3.Jiangsu Acad Agr Sci, Lab Agr Wastes Treatment & Recycling, Inst Agr
关键词： Upconversion nanophosphors;Redox reaction;Luminescence switching;Crystal structure;Cerium
期刊名称：JOURNAL OF LUMINESCENCE （ 影响因子：3.599； 五年影响因子：3.006 ）
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年卷期：
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收录情况： SCI
摘要： 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.
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