| Popis: |
This study experimentally investigated the evaporation and wetting transition behavior of fakir drops on five different microstructured surfaces. Diamond-like carbon was introduced as the substrate, and the influence of varying the width, height, and pitch of the micropillars was assessed. The results showed that different evaporation modes emerged during the transition, which were influenced by the interfacial properties of the surfaces. In addition, the resistance of superhydrophobic surfaces to the Cassie–Baxter to Wenzel transition was strongly dependent on the depinning ability of the three-phase contact line of the liquid drop. The accuracy of the theoretical models for predicting the critical transition parameters was discussed, and a numerical model was developed in the surface evolver to compute the penetration of the drop bottom meniscus within the micropillars. Finally, a robust superhydrophobic surface capable of suppressing the Cassie–Baxter to Wenzel transition without a hierarchical nanostructure for microdroplets less than 0.37 mm in diameter was demonstrated as the key outcome of this study. |
