Figure 2 | NPG Asia Materials

Figure 2

From: Combining the lotus leaf effect with artificial photosynthesis: regeneration of underwater superhydrophobicity of hierarchical ZnO/Si surfaces by solar water splitting

Figure 2

(a) Digital image of superhydrophobic ZnO NRs submerged in water. The submerged part of the substrate had a silvery surface due to total light reflection at the water–air interface. (b) Schematic images describing the total reflections at the water–air interface. (c) Relative intensity transitions of the Si MPs with a 30-μm micropost spacing, ZnO NRs and ZnO/Si HRs with 100, 50 and 30-μm micropost spacings when submerged in water at a depth of 20 cm. The relative intensity represents the stability of the underwater superhydrophobicity. (d) Schematic images demonstrating the mechanism by which the submerged substrate loses its underwater superhydrophobicity. (e) Decay time (τd) for the submerged substrates.

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