Photoswitchable WO₃₋ₓ QDs/Cu NCs Composite Films for Efficient UV Detection and Dual-Mode Anticounterfeiting

Photoswitchable fluorescent materials (PFMs) have attracted considerable attention due to the intrinsic advantages of non-contact operation, cleanliness, and non-invasiveness. Conventional PFMs always require complicated preparation processes with poor fluorescence switching...