A facile solution immersion process for the fabrication of superhydrophobic ZnO surfaces with tunable water adhesion

摘要

Superhydrophobic ZnO surfaces with different morphologies were fabricated through a solution immersion process combining both chemcal liquid deposition and self-assembly of stearic acid. We regulate the solution immersion process by changing the volume content of formamide in the formamide/water mixture to control different morphologies of ZnO surfaces. After being modified with stearic acid, the as-prepared ZnO surfaces show an analogous superhydrophobicity but tunable water adhesion that ranges from very high to extremely low, on which the sliding angle is controlled from 90 (the water droplet is firmly pinned on the superhydrophobic surface at any tilted angles) to 30 ± 3° and 8 ± 1° respectively. This simple and practical method can provide an important strategy for the water adhesion adjustment on superhydrophobic surfaces.