Sustainable circularly polarized luminescent inks for cryptography.

Area of Science:

• Materials Science
• Optics
• Polymer Chemistry

Background:

• Chiral liquid crystals exhibit unique optical properties.
• Developing stable, functional inks for advanced applications remains a challenge.

Purpose of the Study:

• To create a reusable ink with stable circularly polarized luminescence.
• To utilize a polymer network for preserving chiral liquid crystal structures during printing.

Main Methods:

• Integration of a reversible polymethyl methacrylate polymer network with chiral liquid crystals.
• Fabrication of a structural scaffold to maintain helical structures.
• Printing process to create the luminescent ink.

Main Results:

• A stable luminescence dissymmetry factor of 3.3 × 10^-1 was achieved.
• The ink demonstrated stable performance under various usage conditions.
• The polymer scaffold successfully preserved the liquid crystals' helical structure.

Conclusions:

• The developed ink offers stable circularly polarized luminescence.
• This technology shows significant potential for multimodal information encryption.