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(a) ECL intensity versus concentration plot for pAP concentrations: 0.05, 0.1, 0.25, 0.3, and 0.4 mM. Plots of (b) ECL intensities and (c) currents obtained by chronoamperometry in the 0.5 μm and 5 μm-gap devices over the same concentration range as the data presented in (a).
