Sustainable circularly polarized luminescent inks for cryptography

Abstract

In this study, a reusable circularly polarized luminescent ink was developed by integrating a polymer network with chiral liquid crystals. Specifically, the reversible network fabricated from polymethyl methacrylate serves as a structural scaffold during the printing process, which effectively preserves the intrinsic macroscopic helical structure of chiral liquid crystals. As a result, a luminescence dissymmetry factor of 3.3×10⁻¹ was retained stably under various usage conditions, demonstrating promising potential for applications in multimodal information encryption.