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SEM micrographs of the flat surface, nanostructure, microstructure, and hierarchical structure measured at tilt angle (shown using two magnifications). All samples are fabricated with epoxy resin coated with -hexatriacontane.
Bar chart showing the measured static contact angle, hysteresis and tilt angles, calculated contact angles obtained using Wenzel and Cassie–Baxter equations with a given value of , and calculated hysteresis angles using Cassie–Baxter equation on various structures. The droplet on flat surface does not move along the surface even at tilt angle of . The bar chart also shows adhesive forces for various structures measured using a radius borosilicate tip.
Summary of static contact angles and hysteresis angles measured and calculated for droplets in Wenzel regime and Cassie–Baxter regime on the various surfaces using the values of and .
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