Pendyala, Prashant Kim, Hong Nam Grewal, Harpreet S. Chae, Uikyu Yang, Sungwook Cho, Il-Joo Song, Simon Yoon, Eui-Sung 2024-01-19T19:02:38Z 2024-01-19T19:02:38Z 2021-09-05 2019-10-02 1556-7265 https://pubs.kist.re.kr/handle/201004/119470 Superhydrophobic textured surfaces are known to maintain a nonwetted state unless external stimuli are applied since they can withstand high wetting pressure. Herein, we report a new category of tunable, one-dimensional (1D) Cassie-to-Wenzel wetting transitions during evaporation, even on superhydrophobic surfaces. The transition initiates at the periphery of the evaporating drop, and the wetting transition propagates toward the center of the drop. The transitions are observed for surfaces with wetting pressures as high as similar to 7,568 Pa, which is much higher than the Laplace pressure, i.e., similar to 200 Pa. In situ high-contrast fluorescence microscopy images of the evaporating drop show that the transition is induced by preferential depinning of the air-water interface and subsequent formation of air bubbles in the cavities near the three-phase contact line. The evaporation-induced internal flow enhances the pressure within the water droplet and subsequently causes a Cassie-to-Wenzel wetting transition. English TAYLOR & FRANCIS INC HEAT-TRANSFER ROUGH SURFACES WATER CONDENSATION DROPLETS DESIGN Internal-Flow-Mediated, Tunable 1D Cassie-to-Wenzel Wetting Transition on Superhydrophobic Microcavity Surfaces during Evaporation Article 10.1080/15567265.2019.1660439 1 NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING, v.23, no.4, pp.275 - 288 NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING 23 4 275 288 scie scopus 000484277400001 2-s2.0-85071371104 Thermodynamics Engineering, Mechanical Nanoscience & Nanotechnology Materials Science, Characterization & Testing Physics, Applied Thermodynamics Engineering Science & Technology - Other Topics Materials Science Physics Article HEAT-TRANSFER ROUGH SURFACES WATER CONDENSATION DROPLETS DESIGN 1D wetting transition Cassie state Wenzel state internal flow evaporation