This study demonstrates the reversible storage and erasure of information using a yellow fluorescent hydrogel, suggesting a novel approach to anticounterfeiting technologies.
In the digital information era, the demand for advanced cryptographic protocols and anticounterfeiting technologies is increasingly intensifying. Leveraging their intrinsic stimuli-responsible characteristics, hydrogels have ascended as premier candidates for the development of anticounterfeiting materials. In this study, we have rapidly synthesized yellow fluorescent carbon quantum dots (Y-CQDs) via microwave irradiation and subsequently encapsulated them within a hydrogel to fabricate a nanocomposite hydrogel with yellow fluorescence. The hydrogel exhibits bright yellow fluorescence when excited by 365 nm UV light. By leveraging the property of Fe3+ to quench the fluorescence of Y-CQDs, as well as the coordination action between ethylenediamine tetraacetic acid disodium salt (EDTA-2Na) and Fe3+, it achieves the storage and erasure of information. This provides a new method for the encoding, storage, and reversible erasure of information.
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Lin et al. (2025) studied this question.
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