摘要
Persistent luminescence has emerged as a robust platform for anti-counterfeiting applications due to its exceptional spatial-temporal decoding capability.Yet,conventional strategies often suffer from uniform emission patterns and predictable replication,compromising their security.Herein,we present“Snap-PLNPs”—near-infrared emitting CaS:Tm persistent luminescent nanoparticles engineered to undergo aqueous-triggered self-destruction via a hydrolysis mechanism.In contrast to traditional photophysical approaches,this chemically initiated degradation irreversibly terminates the luminescence,ensuring that security information can be decoded only once.Moreover,by incorporating an additional SiO_(2)shell,we introduce a programmable delay in the hydrolysis process,thereby modulating the duration of the emission and adding a temporal regulation layer.This dual control—combining instantaneous chemical deactivation with time-resolved modulation—establishes a dynamic hierarchical security encoding framework.When embedded into laser-engraved logos,these CaS:Tm@SiO_(2)hybrids enable a novel triple-layer anti-counterfeiting strategy that integrates spatial,temporal,and chemical dimensions.Our results underscore the potential of Snap-PLNPs as a next-generation platform for robust and adaptive security technologies.
基金
supported by the National Natural Science Foundation of China(Grant No.52172083)
Zhejiang Province Key R&D Program:Vanguard and Leading Geese Projects(Grant No.2024C01190)
the Guangzhou Key Research and Development Program(Grant No.2023B03J1239)
Program for Innovative Research Team in University of Education System of Guangzhou(Grant No.202235404).
