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Related Experiment Video

Updated: Jun 28, 2025

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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
PubMed
Summary
This summary is machine-generated.

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.

Keywords:
double-lock encryptionhost-guest systemliquid crystal assemblystructural colortime-dependent

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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.