Fig. 1. Surface structure and wettability of the silica glass surface before and after fs laser treatment. (a) SEM image of the untreated surface. (b) LM droplet on the untreated flat surface. (c) LM droplet adhering to the vertical untreated surface. (d) SEM image of the surface after fs laser ablation. (e) LM droplet on the laser-ablated silica glass surface. (f) LM droplet rolling on the laser-structured surface.
