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Updated: May 2, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

Spatiotemporal Dual Encryption Based on Dynamic Chiral Molecular Diffusion in Polymer-Stabilized Cholesteric Liquid

Yinghao Li¹, Mengwei Feng¹, Tingjie Deng²

¹Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing100083, P. R. China.

ACS Applied Materials & Interfaces

|May 1, 2026

Summary

This study introduces a novel anticounterfeiting method using chiral molecular diffusion in liquid crystals. This spatiotemporal control enables multicolor patterns and enhances security through dual encryption.

Keywords:

anticounterfeiting cholesteric liquid crystals color evolution dynamic tuning optical information encryption

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Area of Science:

Materials Science
Optics
Chemistry

Background:

Conventional anticounterfeiting methods using polymer-stabilized cholesteric liquid crystals (PSCLC) often lack sufficient encryption capabilities.
Existing technologies face limitations in color display and security features.

Purpose of the Study:

To develop an advanced anticounterfeiting strategy leveraging spatiotemporal control of chiral molecular diffusion.
To overcome the color limitations of single-layer liquid crystal devices and enhance optical information encryption.

Main Methods:

Integration of a laser-etched polymer film with right-handed chiral molecules into a left-handed blue PSCLC.
Utilizing localized vertical diffusion and interfacial racemization for dynamic control.
Precisely controlling the helical pitch of liquid crystal materials to tune structural color.

Main Results:

Achieved continuous tuning of structural color across blue, green, red, and near-infrared bands.
Enabled multicolor, pixelated patterns within a single device layer.
Demonstrated a dual spatiotemporal and spectral encryption mechanism for enhanced security.

Conclusions:

The proposed method offers a significant advancement in anticounterfeiting technology by overcoming traditional limitations.
The synergistic encryption scheme provides robust security for optical information.
This technology presents a promising solution for advanced anti-fraud applications.