Fig. 1. Preparation process and morphology characterization of SHADR structure. (a) Preparation process of SHADR structure; (b) parameters of SHADR structure; (c) original Ti surface and wettability; (d) Ti surface and wettability after laser machining; (e) Ti surface and wettability after superhydrophobic modification; (f) SHADR surface and wettability

Fig. 2. Droplet transport and its mechanism explanation. (a) Schematic of droplet transport; (b) sequential images of transport process; (c) mechanical analysis of spontaneous transport

Fig. 3. Droplet transport performances on SHADR structure under different parameters. (a) α; (b) w; (c) V; (d) SHADR structural stability test

Fig. 4. Underwater bubble transport and effects of parameters on transport. (a) Schematic of bubble transport; (b) average speed of bubbles during transportation; (c) variation of bubble radius curvature

Fig. 5. Reaction process of microdroplets. (a) Droplet is released from dropper; (b) two droplets begin to move towards middle; (c) two droplets begin to converge; (d) color is finally uniform after droplet convergence