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Surface parameters of irradiated polyacrylamide (PAM) layers for a 2 μm × 2 μm area: (a) Mean z-height; (b) area roughness (Ra); (c) area RMS; (d) maximum range. The area roughness and area RMS parameters show an increment with laser pulses up to ~ 200 lp followed by a dip at 103 lp.
