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Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

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Published on: October 29, 2016

Boosting Persistent Luminescence with Spatially Confined Ion Doping for Profiling Bacterial-Environment Interactions.

Jiahui Tan¹, Yunyun Zhang¹, Yuxin Shi¹

¹The Key Lab of Health Chemistry & Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering & Materials Science, Soochow University, Suzhou 215123, China.

ACS Applied Materials & Interfaces

|April 23, 2026

Summary

This study optimizes ion doping in persistent luminescence nanoparticles (PLNPs) using core-shell structures to enhance luminescence efficiency. A novel nanoprobe was developed to monitor bacterial-environment interactions, showing potential for biomedical applications.

Keywords:

autofluorescence biosensing core−shell nanoparticles persistent luminescence

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In Situ Measurement and Correlation of Cell Density and Light Emission of Bioluminescent Bacteria

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Area of Science:

Materials Science
Nanotechnology
Biomedical Engineering

Background:

Ion doping is crucial for enhancing persistent luminescence nanoparticles (PLNPs) efficiency.
Current doping strategies for PLNPs require optimization to overcome limitations like concentration quenching.
Understanding the precise effects of ion doping on persistent luminescence is essential for developing advanced materials.

Purpose of the Study:

To systematically investigate the effects of heterovalent K+ doping on CaSc2O4:Tb PLNPs.
To refine ion doping strategies for improved persistent luminescence efficiency.
To develop a nanoprobe for monitoring bacterial-environment interactions using enhanced PLNPs.

Main Methods:

Investigated heterovalent K+ doping in CaSc2O4:Tb PLNPs.
Designed and synthesized core-shell structured PLNPs (CaSc2O4:Tb@CaSc2O4:K and CaSc2O4:K@CaSc2O4:Tb).
Constructed a reversible K@Tb@Fe-TA nanoprobe for bacterial interaction monitoring.

Main Results:

Optimal K+ doping ratio in codoped CaSc2O4:Tb,K was limited to 1.5% due to concentration quenching.
Core-shell structures (Tb@K and K@Tb) increased the optimal K+ doping ratio to 7% and boosted luminescence intensities by 1.9-2.2 times.
The K@Tb@Fe-TA nanoprobe successfully monitored bacterial-environment interactions by detecting Fe3+ reduction by Shewanella putrefaciens.

Conclusions:

A superior ion-doping strategy using core-shell structures significantly enhances persistent luminescence efficiency in PLNPs.
The developed nanoprobe offers a promising tool for tracking bacterial-environment interactions, with potential for biomedical applications.
This work advances the development of PLNPs for diverse applications, including biomedical imaging and sensing.