Figure 5: Spatial variability of EcFM data recorded across Au/SiO2 boundaries in milliQ water. | Nature Communications

Figure 5: Spatial variability of EcFM data recorded across Au/SiO2 boundaries in milliQ water.

From: Probing charge screening dynamics and electrochemical processes at the solid–liquid interface with electrochemical force microscopy

Figure 5

(a) Topography image of Au electrodes on a SiO2 substrate recorded using amplitude modulation AFM (scale bar, 2 μm, image size=10 × 10 μm). (b) Average cross-sectional EcFM data recorded 200 nm above the surface and determined from the area marked with a yellow box in a for first (squares) and second (circles) harmonic EcFM amplitude responses during the application of +1.5 V (red) and −1.5 V (blue) bias pulses. Spatial variability maps from a grid of 30 × 30 2D EcFM measurements of the (c,d) first and (e,f) second harmonic EcFM amplitude responses at 5 ms after the onset of the bias-on state for (c,e) +1.5 V and (d,f) −1.5 V, respectively.

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