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Polyhedral Oligomeric Silsesquioxane Functionalized Carbon Dots for Cell Imaging.

Wen-Jing Wang1, Xin Hai1, Quan-Xing Mao1

  • 1†Research Center for Analytical Sciences, Northeastern University, Box 332, Shenyang 110819, China.

ACS Applied Materials & Interfaces
|July 15, 2015
PubMed
Summary

New hybrid carbon dots functionalized with octa-aminopropyl polyhedral oligomeric silsesquioxane (OA-POSS) offer stable, multicolor cell imaging. These CDs/POSS exhibit excellent photoluminescence and resistance to photobleaching, making them ideal for biological applications.

Keywords:
carbon dotscell imagingfunctionalizationorganic−inorganic hybridpolyhedral oligomeric silsesquioxane

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Carbon dots (CDs) are promising fluorescent nanomaterials.
  • Functionalization is key to enhancing CD properties for specific applications.
  • Polyhedral oligomeric silsesquioxanes (POSS) can improve nanoparticle stability and performance.

Purpose of the Study:

  • To synthesize and characterize novel hybrid carbon dots functionalized with OA-POSS.
  • To evaluate the photoluminescent properties and stability of the synthesized CDs/POSS.
  • To demonstrate the potential of CDs/POSS for multicolor cell imaging.

Main Methods:

  • One-pot synthesis of CDs/POSS using glycerol and OA-POSS.
  • Characterization of CDs/POSS size, dispersion, and photoluminescence.
  • Assessment of photobleaching resistance and stability in biological matrices.
  • Application in multicolor imaging of HeLa and MCF-7 cells.

Main Results:

  • Successfully synthesized well-dispersed CDs/POSS with a diameter of ~3.6 nm.
  • Achieved a photoluminescence quantum yield of 24.0% with CDs/POSS.
  • Demonstrated excellent photoluminescence stability and resistance to photobleaching.
  • Confirmed multicolor imaging capability in HeLa and MCF-7 cell lines.

Conclusions:

  • CDs/POSS represent a stable and efficient fluorescent probe for biological imaging.
  • The tunable photoluminescence based on excitation wavelength enables multicolor imaging.
  • This hybrid material holds significant potential for advanced bioimaging techniques.