Fig. 3. SEM images of the laser-patterned nanoripples (h4, h5 and h6). (a, e and i) 1000× magnification. Scale bar = 25 μm. (b, f and j) 20 000× magnification. Scale bar = 2.5 μm (c, g and k) 35 000 magnification. Scale bar = 1 μm. (d, h and l) Histograms showing the particle size distribution of h4, h5 and h6 samples.