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. 2019 Apr 30;9:6721. doi: 10.1038/s41598-019-43055-3

Figure 4.

Figure 4

SEM images of titanium surfaces: (a) untreated Ti surface, (b) DLIP processed hole-like pattern with a spatial period Λ of 5 μm processed using a fluence of 0.93 J/cm2 and 5 laser pulses, (c) higher magnification of (b) with an inset to show the occurrence of Low Spatial Frequency and High Spatial Frequency Laser-Induced Periodic Surface Structures (LSFLs and HSFLs).