Figure 4.

(a) Schematic illustration of the procedure to construct superhydrophobic TiO₂ particle-decorated cotton fabric. (b) UV transmission measurements for various deposition durations of TiO₂ nanoparticles coated onto cotton fabric samples. (c) A fluorine-free superhydrophobic coating with high flexibility on different substrates. (d) Water contact angle (CA) and sliding angle (SA) on the superhydrophobic surface after the treatment at different conditions. (a,b) Reproduced with permission from ref (19). (c,d) Reproduced with permission from ref (22).