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Detection of complementary (a) and random (b) ssDNA utilizing NGQDs/ssDNA platform. The fluorescence spectra of NGQDs, NGQDs/ssDNA, and NGQDs/ssDNA mixed with complementary and random ssDNA strands at the concentration ratios of 1:0.01 (orange), 1:0.1 (yellow), 1:0.25 (green), 1:0.5 (teal), 1:1 (light blue), 1:2 (blue), and 1:4 (purple) are shown along with their corresponding integrated intensities displayed as bar plots.
