Ultra-Sensitive Water Detection Based on NaErF4@NaYF4 High-Level-Doping Upconversion Nanoparticles
Ultra-Sensitive Water Detection Based on NaErF4@NaYF4 High-Level-Doping Upconversion Nanoparticles
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DOI：
10.1016/j.apsusc.2021.151701
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发表时间：
2021-10
影响因子：
6.7
通讯作者：
Jing Zuo;Wei Wang;Dongxu Zhang;Xikun Wang;Yanling Ma;Peitong Li;Yifan Li;Wen-heng Sun;
中科院分区：
文献类型：
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作者：
Jing Zuo;Wei Wang;Dongxu Zhang;Xikun Wang;Yanling Ma;Peitong Li;Yifan Li;Wen-heng Sun;
Water-sensitive detection plays a vital role in our society and life, such as the chemical industry, environmental monitoring, and food inspection. In this work water sensitivity as high as 5 ppm (0.0005 vol%) is realized based on a novel upconversion nanophosphor. Different from the popularly employed low-doping strategies, an efficient high-level-doping nanostructure,i.e., NaErF4@NaYF4, is tailored for the desired upconversion emission, resulting in more than one order of magnitude enhancement of the sensitivity compared to the record of the low-doped counterparts. The superiority of this structure is determined to come from the robust interactions between the Er3+ions and the water molecules adsorbed on the particle surface. This design offers a new strategy of nanophosphor structures for ultrasensitive water sensing and sheds light on further optimization of nanophosphor based sensors.
