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Excitation Dependent Nonconventional Afterglow for 6D Dynamic Encryptions
Shu-Yue Yang1, Wen-Ting Wu2, Guang-Yue Li3
1College of Sciences, College of Energy Storage, College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|June 2, 2026
Summary
Researchers developed excitation-dependent afterglow in polyesters using metaboric acid (MBA). This novel approach enables tunable colors for advanced applications like 6D dynamic encryption, overcoming limitations in nonconventional luminescent materials.
Area of Science:
- Materials Science
- Polymer Chemistry
- Luminescence
Background:
- Nonconventional luminescent materials lacking aromatic chromophores are of significant interest.
- Achieving visible-light persistent luminescence in these materials is challenging.
Purpose of the Study:
- To develop intrinsic excitation-dependent afterglow in aliphatic polyesters.
- To explore tunable emission colors and advanced applications.
Main Methods:
- Hybridization of aliphatic polyesters with metaboric acid (MBA).
- Tuning excitation sources (254 to 405 nm) to observe afterglow shifts.
- Doping with commercial dyes to achieve multicolor emission via triplet-to-singlet Förster resonance energy transfer (TS-FRET).
Main Results:
- Intrinsic excitation-dependent afterglow observed in MBA-polyester composites, with emission peaks shifting from 431 to 540 nm.
- Afterglow color tunable from deep blue to red by doping.
- Fabrication of composites into 3D artwares and anti-counterfeiting labels.
- Demonstration of a 6D dynamic encryption platform using a luminescent magic cube.
Conclusions:
- A novel composite-induced strategy for intrinsic excitation-dependent afterglow in aliphatic polyesters was established.
- The developed materials show pioneering applications in advanced information encryption.
- The strategy offers a pathway for creating functional luminescent polymers.
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