Fig. 2: Image reconstruction in SS-KPFM: Sparsity and scanning speed.
From: High-speed mapping of surface charge dynamics using sparse scanning Kelvin probe force microscopy
SS-KPFM images of the 2D WS2 triangular flake on Si substrate for different number of spiral cycles, a 24 cycles, c 12 cycles, e 6 cycles. Corresponding GP reconstructed images in (b), (d), and (f). g CPD profile along the dashed lines (black 24 cycles, orange 12 cycles and blue 6 cycles). Images of the checkerboard written in a PZT thin film: h Single Frequency PFM Phase Image. i Raster scan H-KPFM at 0.000065 fps. SS-KPFM at: j 0.5 fps, k 1 fps, l 2 fps, m 3.3 fps. Insets are the SS-KPFM Raw data for each case. n Corresponding CPD profiles along the dashed lines (dashed black raster scan, yellow 0.5 fps, green 1 fps, turquoise blue 2 fps, dark blue 3.3 fps).
