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Voltammograms recorded by CV (100 mV s−1) for 20 μM free MB (A) and 20 μM MB-DNA-MB 30-mer (B) and, by DPV (A = 0.05 V, s = 0.008 V) (C) and SWV (A = 0.05 V, s = 0.008 V, f = 50 Hz) (D) for 20 μM MB-DNA-MB 30-mer, obtained on bare (⋯) and nanostructured (—) electrodes.
