光子上转换
化学
荧光
钕
离子
稀土
分析化学(期刊)
光学
激光器
矿物学
环境化学
物理
有机化学
作者
Yuemei Li,Yongmei Li,Yandong Bai,Rui Wang
出处
期刊:Talanta
[Elsevier]
日期:2023-11-01
卷期号:264: 124764-124764
被引量:3
标识
DOI:10.1016/j.talanta.2023.124764
摘要
The fields of biosensitivity and biological imaging have received a lot of attention from rare earth-doped upconversion nanoparticles (UCNPs). However, owing to the relatively large energy difference of rare earth ions, biological sensitivity based on UCNPs is restricted to detect at low temperature. Here, we design core-shell-shell NaErF4:Yb@Nd2O3@SiO2 UCNPs as a dual-mode bioprobe that produces blue, green, and red multi-color upconversion emissions at extremely low temperatures between 100 K and 280 K. Based on the thermally coupled energy levels (TCELs) of Er3+ (2H11/2 and 4S3/2) and Nd3+ (4F5/2 and 4F3/2) at 100 K, the greatest relative sensitivity (SR) approaches 12.7% K−1. NaErF4:Yb@Nd2O3@SiO2 injection is used to achieve blue upconversion emission imaging of frozen heart tissue, showing that this UCNP can serve as a low-temperature sensitive biological fluorescence.
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