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Electrochemical characterization of ion sensors. Square wave voltammograms of Cu2+ at different concentrations (1 × 10−11, 1 × 10−10, 1 × 10−9, 1 × 10−7, 1 × 10−6 M) in PBS (a); plot of CuCl2 peak currents vs. log Cu2+ concentrations (b). Square wave voltammograms of Zn2+ at different concentrations (1 × 10−11, 1 × 10−10, 1 × 10−9, 1 × 10−7, 1 × 10−6 M) in PBS (c); plot of ZnCl2 peak currents vs. log Zn2+ concentrations (d).
