Fig. 2. Top view (left column),cross-section FEG-SEM images (middle column) and histograms (right column) representing the average column diameter on the sample surface for coatings with different thickness: (a) 250 nm (black), (b) 600 nm (red), (c) 1200 nm (green), (d) 2000 nm (dark blue), (e) 4000 nm (light blue) deposited on (1 0 0) Si and (f) 1800 nm (magenta) deposited on commercial steel substrates. The scale bar is 800 nm for all photos and the thicknesses are indicated on each image.
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