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(a) CVs (five cycles) obtained from one location of the SECCM measurement where anodization was carried out for 300 s. (b) Spatially resolved map of DA surface concentration (Γads). (c) Spatially resolved map of the peak potential difference between DA oxidation and DAQ reduction peaks (ΔEp). (d) SEM image of the SECCM scan area covering pristine (darker) and anodized for 300 s (brighter) regions. Maps contained 99 pixels (55 × 45 μm2 with 5 μm as the hopping distance).
