Realization of Cu2O and CuO coatings via sputtering for surface wettability transition

In this work, we report a one-step sputtering method for direct preparation of Cu2O and CuO coatings on different substrates, i.e. glass, thin polymer films and titanium alloy. Interestingly, these coatings possessing micro- and nanostructures exhibiting controlled dual-scale roughness and the wettability investigation reveals that we can tune the wetting properties.