Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (5): 901-906.doi: 10.1007/s40242-024-4152-z

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Waterproof Perovskite Quantum Dots for In-vivo Photoluminescence Bioimaging

JIAO Ziyue, WANG Xinli, GAO Jie, HUANG Xiao, WANG Yi   

  1. Key Laboratory of Advanced Light Conversion Materials and Biophotonics, School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, P. R. China
  • Received:2024-06-29 Online:2024-10-01 Published:2024-09-26
  • Contact: WANG Yi,ywang@ruc.edu.cn E-mail:ywang@ruc.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.22373114,22103096,and 22273119),the Beijing Natural Science Foundation,China (No.2232008) and the Research Funds of Renmin University of China (No.22XNKJ08).

Abstract: Perovskite quantum dots (PQDs) have demonstrated great promise in bioimaging applications owing to their outstanding photophysical properties. Nonetheless, their practicality is seriously limited by the instability of PQDs against moisture. Here we develop a post-synthetic ligand exchange strategy to construct silica-coated PQD (PQD@SiO2) nanocrystals, which results in the simultaneous improvement of photoluminescence efficiency and moisture stability. More importantly, compared to the classical in-situ ligand exchange method of fabricating PQD@SiO2, the issues of chemical etching and resultant photoluminescence degradation are judiciously overcome. Employing the proposed PQD@SiO2, we showcase their robust usefulness in labeling chlorella, paving the way for PQD-based in-vivo photoluminescence bioimaging methodology.

Key words: Perovskite, Quantum dot, Photoluminescence, Stability, Bioimaging