Dynamic Disassembling Strategy of Luminescent Nanoclusters Assemblies for Integrating Multiple-Node Information Encryption with Transient Imaging Feature

Abstract

Avoiding the second leakage and boosting the complexity of confidential information have been two key directions in the development of the field of information security. However, it still remains formidable challenges to combine these two strategies in a single luminescent material. Here, it has integrated multiple-node time-gated information encryption and self-erased decryption data with transient imaging feature for enormously enhancing the information security protection based on the dynamic assembling/disassembling process of luminescence copper nanoclusters (CuNCs). Multiple CuNCs-based assemblies for the information encryption are controlled after introducing metal ions (Zn²⁺ and Al³⁺) and ammonia, which gives rise to the tremendously fluorescence improvement of CuNCs through aggregation-induced emission (AIE) effect. These assemblies can be disassembled upon adding a chelator agent (EDTA) in concomitant with fluorescence vanishing behavior. Their decomposition rates heavily depend on the type of metal ions, ammonia concentration, and EDTA concentration. Based on the dynamic disassembling process, time-dependent multi-node information is encrypted. The real information can be read observed only once at the correct “time key” and then automatically self-destructed within dozens of minutes. This study provides new insights into designing advanced information security protection against the risk of the second leakage and deciphering data of confidential information.