Figure 5 | Scientific Reports

Figure 5

From: EFM data mapped into 2D images of tip-sample contact potential difference and capacitance second derivative

Figure 5

Sample biasing scheme.

(a) Sample biasing waveform. (b) Basic principle of SPP-EFM local calibration for the first pixels of the A and B channels. The 8 values from the lift-mode EFM-phase trace and retrace channels are plotted vs. the applied bias and then fitted by using the previously described parabola. (c) Generation of the pixel (2,1) for A and B channels.

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