Full fluorescence paper of Eu3+– induced diblock copolymer nanoaggregates for negative multiple mode photon information storage and encryption

The protection of personal information is becoming increasingly difficult in the age of rapid growth in communication and information technologies. However, current relating techniques, such as anti-counterfeiting, depend on the simple luminescence image and UV–recognition. Thus, advanced methods for information encryption and decryption are urgently required. Herein, we report a full fluorescence paper (FFP) containing stable, fluorescent Eu–induced diblock nanoaggregates (EIPAs), and design a negative photon information multiple encryption (NME) method. Multiple quenching mechanisms can be employed to encrypt and decrypt information, using different quenching molecules. These include an internal filtering effect, a dynamic quenching effect, and a combined static and dynamic quenching effect. The recovery of different information under different light sources enables encryption and decryption cycles.