Figure 14.

(a) Picture of a polished Si wafer (i) and side SEM views of the as-prepared Si spikes surfaces structured at four different laser fluencies: (ii) 0.34 J∕cm² (A1), (iii) 0.56 J∕cm² (A2), (iv) 0.90 J∕cm² (A3), (v) 1.69 J∕cm² (A4). (b) Photographs of water droplets on the patterned Si surfaces. (c) SEM micrographs of fibroblast cells adhering to the surfaces. (d) Confocal laser microscopy pictures of fibroblast cells cultured for 3 days on the respective surfaces. Reproduced with permission from A. Ranella et al., Acta Biomater. 6, 2711 (2010). Copyright 2010. Elsevier.