Photonic Security Labels with Triple-independent Optical Signal Enabled by Shear-Induced Colloidal Ordering in...

Area of Science:

• Materials Science
• Nanotechnology
• Optics

Background:

• Growing demand for information security necessitates advanced encryption and anticounterfeiting technologies.
• Current systems face challenges in displaying dynamic, trigger-responsive hidden information.
• Inspiration drawn from the natural optical properties of *P. oribazus* butterflies.

Purpose of the Study:

• To develop novel photonic security labels with multiple, independent optical signals for high-security information encryption.
• To engineer advanced anticounterfeiting solutions utilizing lanthanide fluorescent metallosupramolecular networks (Ln-FMP).
• To explore sustainable and recyclable materials for intelligent information security.

Main Methods:

• Fabrication of Ln-FMP via shear-induced colloidal ordering in lanthanide-coordinated polyurethane and carboxylated polystyrene composites.
• Integration of triple-independent optical signals: structural color and two excitation wavelength-dependent fluorescence.
• Design and encoding of diverse optical signals for information encryption.

Main Results:

• Successful creation of photonic security labels with triple-independent optical signals.
• Demonstration of high-security information encryption and anticounterfeiting capabilities.
• Ln-FMP exhibited robust data storage and excellent closed-loop recyclability due to reversible supramolecular interactions.

Conclusions:

• The developed Ln-FMP provide a reliable platform for advanced intelligent information encryption.
• The study offers a sustainable approach to developing high-security anticounterfeiting systems.
• The unique optical properties enable robust data security and material reusability.