Photoresponsive Luminescent Polymeric Hydrogels for Reversible Information Encryption and Decryption.

Abstract in brief

• The study discusses creating light-responsive hydrogel materials that can switch luminescence on and off, which helps protect confidential information by making it invisible under normal conditions but readable when triggered by specific light wavelengths.
• These hydrogels are made through a process that combines acrylamide, a lanthanide complex, and diarylethene, which can change forms when exposed to UV or visible light; this change controls the hydrogel's ability to emit light.
• The researchers use these hydrogels to encode information in 3D shapes or patterns, which can be read with UV light, erased with 300 nm UV exposure, and then restored under visible light, enabling reversible and multiple rounds of secure information encryption and decryption.]