Tunable multimodal printable up-/down-conversion nanomaterials for gradient information encryption
Youfusheng Wu, Enbo Xue, Bin Tian, Ke Zheng, Jing Liang, Wei Wu
Abstract
system. Based on various security inks, anti-counterfeiting patterns with multilevel security strength are produced through screen printing technology. Color-tunable security patterns are obtained based on different security inks containing multicolor liquid CDs. The security strength can be boosted by combining the color-tunable properties and dual-mode luminescence of FL and RTP. Furthermore, higher-level anti-counterfeiting is achieved by introducing near-infrared induced upconversion luminescence phosphors into CDs systems. The excellent security performance of gradient information encryption shows that the proposed strategy establishes superior coding capacity for advanced information encryption and provides a good reference for cutting-edge research.