Lattice‐Engineered Lanthanide Nanocrystals with Tunable Near‐Infrared‐IIb Lifetime
Abstract
AbstractLattice engineering in lanthanide nanocrystals (LnNCs) is fundamental for tailoring their versatile optical properties, yet it remains underexplored in manipulating the downconversion characteristics. Here, we engineer the lattices from distorted to strain‐graded in LnNCs by CaF2 deposition on vacancy‐controlled β‐NaxGdF3+x:Yb,A (A = Tm/Er, x = 0.5, 0.75, 1) NCs. We demonstrate that strain‐graded lattices with high phonon energy enhance the multi‐phonon orbit‐lattice relaxation (MPR) in the downconversion process more effectively than distorted lattices, which helps to extend the near‐infrared‐IIb (NIR‐IIb, 1500–1700 nm) lifetime of Er3+/Tm3+ by 2∼4 times. Subsequent epitaxial CaF2 growth further attenuates surface phonon coupling, enabling exponential tunability of NIR‐IIb lifetime (Tm3+: 0.74∼6.28 ms; Er3+: 0.055∼9.2 ms). Finally, we showcase the potential of these LnNCs in time‐resolved multiplexed bioimaging.
Article Details
Authors (8)
Feng Ren
Feng Wu
Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering
Sisi Ling
CAS Key Laboratory of Nano-Bio Interface, Jiangsu Key Laboratory of Organoid Engineering and Precision Medicine, Division of Nanobiomedicine and i-Lab
Yejun Zhang
CAS Key Laboratory of Nano‐Bio Interface Jiangsu Key Laboratory of Organoid Engineering and Precision Medicine Division of Nanobiomedicine and <i>i</i>‐Lab Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Suzhou 215123 China
Chunyan Li
Jiang Jiang
CAS Key Laboratory of Nano-Bio Interface, Jiangsu Key Laboratory of Organoid Engineering and Precision Medicine, Division of Nanobiomedicine and i-Lab
Hongchao Yang
CAS Key Laboratory of Nano‐Bio Interface Jiangsu Key Laboratory of Organoid Engineering and Precision Medicine Division of Nanobiomedicine and <i>i</i>‐Lab Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Suzhou 215123 China
Qiangbin Wang
CAS Key Laboratory of Nano-Bio Interface, Jiangsu Key Laboratory of Organoid Engineering and Precision Medicine, Division of Nanobiomedicine and i-Lab