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Ultra-Stable Luminescent Smart Textiles Embedded With Thermally Responsive Copper Iodide Clusters
Qi Chen1, Liang Chen2, Bing Zhu1
1Key Laboratory of Special Protective Textiles, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, 214122, China.
Small (Weinheim an Der Bergstrasse, Germany)
|October 7, 2025
Summary
Researchers developed stable, flexible copper iodide fibers for optoelectronics. These fibers exhibit reversible thermochromism and high photoluminescence, enabling advanced anti-counterfeiting and secure wearable applications.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Copper iodide clusters offer promising photoluminescence (PL) for flexible optoelectronic devices.
- Challenges include insufficient mechanical stability and environmental resilience for practical use.
Purpose of the Study:
- To develop ultrastable copper iodide fibers using a scalable wet-spinning method.
- To enhance mechanical flexibility, environmental stability, and photoluminescence properties for advanced applications.
Main Methods:
- Fabrication of Cu4I4(L)4@CA fibers via scalable wet-spinning.
- Encapsulation of copper iodide clusters within calcium alginate matrix.
- Characterization of photoluminescence, thermochromism, flexibility, and environmental stability.
Main Results:
- Ultrastable Cu4I4(L)4@CA fibers achieved with high photoluminescence quantum yields (>85%) at 1 wt% doping.
- Reversible thermochromic switching observed across 80-300 K (white to yellow or blue-purple to orange).
- Fibers demonstrated textile-grade flexibility and >98% PL retention under harsh conditions (humidity, UV, solvents).
Conclusions:
- The developed fibers offer a synergistic platform combining stimuli-responsive optoelectronics with textile processability.
- Applications include next-generation secure wearables, stealth luminescent textiles, and hierarchical anti-counterfeiting systems.
- Pioneered a dual-authentication encryption platform utilizing triple-state information switching and photonic encoding.
