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Assembly-Induced Dynamic Structural Color in a Host-Guest System for Time-Dependent Anticounterfeiting and
Yufan Ji1, Tianfu Song1, Haifeng Yu1
1School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing, 100871, China.
Angewandte Chemie (International Ed. in English)
|April 10, 2024
Summary
Researchers developed a novel host-guest polymer system for dynamic anticounterfeiting. This material enables time-dependent information display and secure encryption, offering advanced security features for information protection.
Area of Science:
- Materials Science
- Polymer Chemistry
- Optics
Background:
- Periodic micro/nanostructures in polymer films are crucial for anticounterfeiting applications.
- Growing demand for information security necessitates materials with time-dependent, repeatable information display.
Purpose of the Study:
- To propose a strategy for time-dependent anticounterfeiting and "double-lock" information encryption.
- To develop a dynamic system based on a host-guest interaction for advanced security applications.
Main Methods:
- Utilized a photoresponsive azopolymer (host) and a liquid-crystalline molecule (guest) in a host-guest system.
- Engineered tunable mass transport within micro/nanostructures by controlling azo group isomerization and mesogen assembly.
- Investigated dynamic structural color changes in the polymer film.
Main Results:
- Achieved time-dependent dynamic anticounterfeiting through tunable mass transport.
- Demonstrated modulation of state appearance timing by adjusting the host-guest ratio.
- Successfully decrypted stored information using a unique decoding method combined with mass transport control.
Conclusions:
- The proposed host-guest system offers an unprecedented dynamic approach for advanced anticounterfeiting.
- This technology provides a higher level of security for information encryption and high-end applications.
- The tunable mass transport and decoding method enable reliable information retrieval.
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