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ZGSO:Cr3+,Ni2+ Persistent Phosphors with Dual Emission in NIR-I and SWIR Ranges for Bio-Imaging Applications.

Guanyu Cai1,2, Thomas Naillon1,3, Johanne Seguin2

  • 1CNRS, IRCP, Institut de Recherche de Chimie Paris, Chimie ParisTech, PSL University, Paris, 75005, France.

Small (Weinheim an Der Bergstrasse, Germany)
|October 16, 2024
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Summary

This study introduces a new material for dual-biological window persistent luminescence (PersL) imaging. This material enables advanced bioimaging in both near-infrared I and near-infrared II regions with high resolution and depth sensitivity.

Keywords:
Cr3+NIRNi2+SWIRZGSObioimagingenergy transferpersistent luminescence

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Area of Science:

  • Materials Science
  • Biomedical Imaging
  • Luminescence

Background:

  • Persistent luminescence (PersL) is valuable for background-free bioimaging, primarily in the near-infrared I (NIR-I) region (650-950 nm).
  • Second shortwave-infrared (SWIR, or NIR-II, 1000-1400 nm) bioimaging offers enhanced penetration depth and clarity but is less established.
  • There is a need for materials capable of emitting in both spectral windows for advanced bioimaging applications.

Purpose of the Study:

  • To synthesize and characterize a novel material, Zn1.33Ga1.33Ni0.005Cr0.005Sn0.33O3.995 (ZGSO:Cr3+, Ni2+), for dual-biological window (dual-BW) persistent luminescence.
  • To investigate the material's optical properties and potential for bioimaging applications in both NIR-I and NIR-II regions.
  • To explore the influence of co-dopants (Cr3+, Ni2+) on emission characteristics via an energy transfer process.

Main Methods:

  • Synthesis of ZGSO:Cr3+, Ni2+ material.
  • Characterization of optical properties, including persistent luminescence emission wavelengths and intensities.
  • Excitation using various sources (X-rays, UV, visible light).
  • Preliminary bioimaging experiments utilizing the dual-BW PersL capabilities.

Main Results:

  • Successful synthesis of ZGSO:Cr3+, Ni2+ exhibiting persistent luminescence in both NIR-I (≈700 nm) and NIR-II (≈1300 nm) regions.
  • Demonstration of excitation via X-rays, UV, and visible light.
  • Preliminary bioimaging experiments showed good spatial resolution and depth sensitivity in both biological windows.
  • Evidence of an energy transfer process from Cr3+ to Ni2+ influencing signal intensity and emission.

Conclusions:

  • The novel ZGSO:Cr3+, Ni2+ material functions as a dual-biological window persistent luminescence agent.
  • This material holds significant potential for advanced bioimaging, offering improved resolution and depth penetration.
  • The dual-BW PersL imaging strategy provides a new, highly accurate tool for sensing and tracing in biological systems.