Evaluation of the solid-liquid contact area fraction of drops deposited on rough surfaces beyond the Wenzel regime Montes Ruiz-Cabello, Francisco Javier Cabrerizo Vílchez, Miguel Ángel Rodríguez Valverde, Miguel Ángel In this work, we studied the wettability of hydrophobic surfaces fabricated with three different materials (PTFE, PDMS and paraffin wax) over a wide range of roughness. We estimated the Advancing, Receding and Most-Stable contact angles and we identified the transition from a homogeneous wetting regime (Wenzel) to a hybrid wetting regime (Cassie-Baxter). Using a modified Cassie-Baxter equation which considers the chemical heterogeneity of the samples, we were able to determine the solid area fraction within the contact area. This way, we designed a methodology to identify the superhydrophobic degree of rough-hydrophobic surfaces. 2025-01-16T13:02:49Z 2025-01-16T13:02:49Z 2019-05-05 journal article F.J. Montes Ruiz-Cabello, M.A. Cabrerizo-Vílchez, M.A Rodríguez-Valverde, Evaluation of the solid-liquid contact area fraction of drops deposited on rough surfaces beyond the Wenzel regime, Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 568, 2019, Pages 455-460, https://hdl.handle.net/10481/99440 j.colsurfa.2019.02.047 https://doi.org/10.1016/j.colsurfa.2019.02.047 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional ELSEVIER