@article{23b5237381ce47b3b21417171ca756c7,
title = "Superhydrophobic floatability of a hydrophilic object driven by edge effect",
abstract = "It is generally believed that a water-repellent surface is necessary for small insects to stand on water. Through a combined experimental and theoretical study, we demonstrate that an object with hydrophilic surface can float with apparent contact angle greater than 90° due to edge effect. The apparent contact angle rises with increasing loading even to a value typically displayed only by superhydrophobic surfaces. On the basis of free energy minimization, two regimes are identified. When buoyancy controls, the meniscus meets the object with the intrinsic contact angle. As surface tension dominates, however, contact angle is regulated by total force balance.",
author = "Chang, {Feng Ming} and Sheng, {Yu Jane} and Tsao, {Heng Kwong}",
note = "Funding Information: We have demonstrated that a hydrophilic object can float with CA being larger than 90° and increased with loading. On the basis of free energy minimization, two regimes are identified. When the weight is supported by buoyancy, the meniscus meets the object with the intrinsic CA and the unwetted height is adjusted by the force balance. Alternatively, as the hydrophilic body is uplifted mainly by surface tension, the unwetted height vanishes without breaking the water surface and the apparent CA is regulated by the force balance. Consequently, a water-repellent surface is not the sufficient condition to stand on water. ",
year = "2009",
doi = "10.1063/1.3264957",
language = "???core.languages.en_GB???",
volume = "95",
journal = "Applied Physics Letters",
issn = "0003-6951",
number = "20",
}