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Rational Design and Development of Organic Afterglow Nanoparticles for Image-Guided Interventions.

Asma Harun1,2, Isabella Vasquez1,2,3, Hannah Bowman4

  • 1Department of Mechanical and Aerospace Engineering, Texas Tech University, Lubbock, Texas, USA.

Small Methods
|May 7, 2026
PubMed
Summary
This summary is machine-generated.

Organic afterglow nanoparticles (ANPs) overcome limitations of conventional imaging by providing persistent luminescence for advanced biomedical applications. This review details ANP design, synthesis, characterization, and therapeutic uses.

Keywords:
X‐ray activated afterglowafterglow imagingafterglow mechanismsbiomedical applicationsorganic afterglow nanoparticlesultrasound‐activated afterglow

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Area of Science:

  • Biomedical Imaging and Nanotechnology
  • Organic Chemistry and Materials Science

Background:

  • Conventional fluorescence imaging faces challenges like autofluorescence, shallow penetration, and photobleaching.
  • Afterglow imaging offers persistent luminescence, enabling background-free, high-sensitivity imaging with improved signal-to-background ratios.

Purpose of the Study:

  • To review the design, synthesis, processing, and characterization of organic afterglow nanoparticles (ANPs).
  • To examine afterglow mechanisms and their influence on nanoparticle properties.
  • To highlight biomedical applications and clinical translation of ANPs.

Main Methods:

  • Exploration of key afterglow mechanisms: chemically initiated electron exchange luminescence (CIEEL), reactive oxygen species-mediated energy transfer, and trap-assisted recombination.
  • Discussion of small-molecule, conjugated-polymer, and polymerization-based afterglow systems.
  • Overview of scalable fabrication methods like nanoprecipitation and self-assembly.

Main Results:

  • Molecular structure, polymer composition, and nanoparticle formulation significantly impact emission wavelength, intensity, persistence, and degradability.
  • Standardized characterization metrics are crucial for reproducibility and clinical translation.
  • ANPs demonstrate diverse biomedical applications, including image-guided surgery, lymph node mapping, and disease detection.

Conclusions:

  • Organic afterglow nanoparticles represent a promising platform for advanced biomedical imaging and therapy.
  • Rational design and standardized characterization are key for developing effective ANP-based clinical tools.
  • ANPs offer significant advantages over conventional imaging techniques for various medical diagnostics and treatments.