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. 2024 May 8;15:3846. doi: 10.1038/s41467-024-47674-x

Fig. 5. Illustration of the multi-level information encryption and anti-counterfeiting.

Fig. 5

a The schematic diagram of the information writing/erasing cycles and photographs of printed pattern taken under UV light on/off. b Demonstration of misleading information with disguised arrow pattern and displaying opposite direction upon creasing UV light. c Illustration of the spatial-time-resolved anti-counterfeiting by using different 4TPYBOH@PVA–Ln materials with lifetime gradients.