Figure 2
From: Hydrodynamic particle focusing enhanced by femtosecond laser deep grooving at low Reynolds numbers
Surficial roughness detection by atomic force microscopy (AFM). (a) Control group. (b–e) Surrounding areas of the grooves engraved under pulse energies of (b) 0.7, (c) 1.4, (d) 2.1 and (e) 2.8 μJ/pulse. (We used the software JPK data processing 6.1 to create the image).
