Underwater superoleophobicity and high transparency of the silica glass after femtosecond laser treatment. (a) Photography of a piece of the treated silica glass. (b–d) Surface microstructure of the laser-ablated silica glass. (e) Photography of an oil droplet (red color) on the as-prepared glass in water. (f) Underwater oil droplet on the rough glass surface. Reproduced from [118
] with the permission.