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High-Capacity Optical Fingerprinting Using Dual-Peak Photoluminescence of Quantum Dots
Introduction Click to copy section linkSection link copied! With the continuous development of technology and the growth of global trade, the problem of counterfeit and inferior products has become increasingly serious. In 2016, the international trade in counterfeit and pirated goods was estimated to reach $509 billion, accounting for approximately 3.3% of global trade.
High-Capacity Optical Fingerprinting Using Dual-Peak Photoluminescence of Quantum Dots
Figure 1 illustrates the conceptual framework and comparative encoding behavior of two classes of QD systems: cadmium selenide/zinc sulfide (CdSe/ZnS) and copper indium sulfide/zinc sulfide CuInS 2 /ZnS (CIS). The process begins with the preparation of QDs, Figure 1 a, where the QDs are deposited through a spin coating technique. Figure S1 presents the Atomic Force Microscopy (AFM) characterization used to determine the film thickness of the deposited film.
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