Research / 2021 / Article / Fig 12

Review Article

Afterglow Carbon Dots: From Fundamentals to Applications

Figure 12

(a) Schematic representation of the creation of covert patterns via inkjet printing with the use of afterglow CDs as encoding ink. (b, c) Data encryption on the basis of the longer emission lifetime of the afterglow luminescence relative to the fluorescence of CDs (adapted and copyright permission [30, 45, 48], Wiley-VCH Verlag GmbH & Co. KGaA). (e) Data encryption based on the convertible nature of fluorescence CDs to phosphorescence CDs upon heating treatment (adapted and copyright permission [76], Wiley-VCH Verlag GmbH & Co. KGaA). (f) Advanced data encryption on the use of reversible aggregation-induced phosphorescence of CDs (adapted and copyright permission [40], Wiley-VCH Verlag GmbH & Co. KGaA).