Slippery property on the femtosecond laser-structured porous PA6 surface. (a) Porous network microstructure of the PA6 substrate after laser processing. (b) Process of a water droplet sliding down the as-prepared SLIPS. (c) Process of a hexadecane droplet sliding down the as-prepared SLIPS. (d) Drops of various pure or complex liquids sliding down from the SLIPS. (e) The self-repairing slippery property of the SLIPS after cutting damage. Reproduced from [129
] with the permission.