Ultrafast Science / 2022 / Article / Fig 3

Review Article

Nature-Inspired Superwettability Achieved by Femtosecond Lasers

Figure 3

Morphology of the laser-drilled microhole structures. (a, b) Steel foil with thickness of 100 μm: (a) pulse width of 3.3 ns and (b) pulse width of 200 fs. (c, d) Monocrystalline sodium chloride (NaCl) surface: (c) pulse width of 16 ns and (d) pulse width of 300 fs. Reproduced from [80, 81] with the permission.