Liquid repellence of the SLIPS on NiTi alloy. (a, b) Femtosecond laser-induced porous microstructure on NiTi alloy substrate. (c) Process of a water droplet sliding down the slippery NiTi surface. (d) Blood sliding down the slippery NiTi surface prepared by femtosecond laser processing. (e) Blood sliding down the original untreated NiTi surface. Reproduced from [131
] with the permission.