Figure 9. (A) Photographs of a latent fingerprint under 365 nm UV light. (B) Demonstration of the data encryption using HBPSi derivatives. Reproduced with permission: Copyright 2022, American Chemical Society.[46] (C) Schematic representation of fluorescence quenching and recovery of HBPSi towards Fe3+. (D) Schematic illustration of the encryption and decryption utilizing the quenching effect of Fe3+. Reproduced with permission: Copyright 2020, The Royal Society of Chemistry.[41]