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Representation of fluorescence values in the presence of 10 mM MgCl2 and 10 mM MgSO4, for different graphenic species (A) GO, (B) GO-COOH and (C) rGO-PEG-NH2 and 100 nM FAM-DNA plus100 nM cDNA. Values represent mean ± SD of n = 3. (** p < 0.01, *** p < 0.001).
