Figure 3
(a) WCA of the Cu2S copper mesh with different sulfuration times after storage in air for 2 days. The reversible wetting transition of Cu2S copper mesh with 60 min sulfuration: (b) Variation of WCA of initially prepared samples when stored in air for different times; (c) Variation of WCA for superhydrophobic Cu2S copper meshes when immersed in ethanol solution for different times; (d) Reversible wettability change of the Cu2S mesh between superhydrophobicity and superhydrophilicity.
