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CV measurements recorded in 1 mM [Fe(CN)6]3−/4−, 0.1 M KCl, for RGO-SPCEs based on (a) 0.05 mg/mL; (b) 0.1 mg/mL; (c) 0.15 mg/mL; and (d) 0.2 mg/mL GO dispersions, after adsorption of ssDNA probe (10 µM) and hybridization with 100 nM DNA target.
