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Ultrabright Green-Emissive Nanodots for Precise Biological Visualization.

Yuxin Guo1, Zihao Wang2, Yu Chen1

  • 1School of Chemistry & Materials Science, Jiangsu Normal University, 101 Shanghai Road, Xuzhou 221116, China.

Nano Letters
|February 7, 2024
PubMed
Summary

Researchers developed ultrabright, water-dispersible fluorescent nanodots using a simple metal-facilitated method. These biocompatible nanodots show high photoluminescence quantum yields and enable sensitive glutathione detection and long-term endoplasmic reticulum imaging in living organisms.

Keywords:
biological imagingcarbon dotendoplasmic reticulum imagingglutathione detectionmetal-doped nanodots

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Area of Science:

  • Materials Science
  • Biotechnology
  • Chemical Engineering

Background:

  • Developing biocompatible and water-dispersible fluorescent probes is crucial for advanced biological imaging.
  • Existing probes often face limitations in brightness, stability, and targeting specificity.

Purpose of the Study:

  • To establish a general, metal-facilitated method for fabricating highly efficient fluorescent nanodots.
  • To evaluate the potential of these nanodots for specific biological applications like analyte detection and cellular imaging.

Main Methods:

  • One-step solvothermal synthesis using rose bengal, ethanol, and various metal ions to create metal-doped nanodots.
  • Characterization of nanodot properties including water dispersibility, photoluminescence quantum yield (PLQY), and phototoxicity.
  • Assessment of Fe-doped nanodots (FeNDs) for glutathione detection and endoplasmic reticulum (ER) tracking in vitro and in vivo.

Main Results:

  • Fabrication of ultrabright green-emissive nanodots with excellent water dispersibility and low phototoxicity.
  • Achieved ultrahigh PLQYs, with FeNDs reaching approximately 97%.
  • Demonstrated sensitive glutathione detection and prolonged ER imaging capacity (>24 h) with FeNDs, outperforming commercial trackers.

Conclusions:

  • The metal-facilitated method provides a versatile approach for preparing high-performance fluorescent nanodots.
  • FeNDs exhibit significant potential as robust probes for biological sensing and long-term cellular imaging.
  • This work offers a promising platform for advancing diverse bio-imaging applications.