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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

374
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
374

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Bio-Inspired Multiple Responsive NIR II Nanophosphors for Reversible and Environment-Interactive Information

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Luminescence

Background:

  • Persistent luminescent materials offer unique optical properties.
  • Developing stimuli-responsive materials is crucial for advanced applications.
  • Near-infrared II (NIR II) emission is valuable for optical technologies.

Purpose of the Study:

  • To synthesize multi-responsive NIR II persistent luminescent nanoparticles.
  • To investigate the influence of solvents on luminescence properties.
  • To explore applications in optical information encryption.

Main Methods:

  • Hydrothermal synthesis of Zn1.2Ga1.6Ge0.2O4:Ni2+ (ZGGO:Ni) nanoparticles.
  • Characterization of NIR II emission properties (peak ≈1330 nm).
  • Testing luminescence response to temperature and various solvents (hydroxyl-containing vs. non-hydroxyl-containing).

Main Results:

  • Successfully synthesized ZGGO:Ni nanoparticles with NIR II persistent luminescence.
  • Demonstrated luminescence quenching in hydroxyl-containing solvents (e.g., water, ethanol) due to surface interactions and FRET.
  • Luminescence remained stable in non-hydroxyl solvents (e.g., n-hexane, D2O).
  • Utilized the material for high-order dynamic optical information encryption.

Conclusions:

  • The synthesized ZGGO:Ni nanoparticles exhibit dual responsiveness to temperature and specific solvents.
  • The luminescence quenching mechanism involves hydroxyl group adsorption and FRET.
  • The material shows promise for advanced, secure optical information encryption applications.
  • This work provides a strategy for optimizing NIR II persistent luminescent materials for interactive applications.