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Item: Title: GQDs Synthesis. Item: Title: Paper strip preparation and set up. Item: Title: Sensing experiments. Item: Title: Acknowledgements Item: Title: Figure 1 Schematic representation of the fluorescence quenching of Quantum Dots in the presence of an analyte by the FRET phenomenon. Item: Title: Figure 2 Characterization of the GQDs and the GQD-modified strip. Item: Title: Figure 3 GQDs-modified paper sensing platform. Item: Title: Figure 4 Performance of the LED-based device compared to the UV light readouts. Item: Title: Figure 5 Interrogation of the GQDs-modified paper-based sensing platform in food and environmental samples. 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