Contact Angle Hysteresis of Non-Flattened-Top Micro/Nanostructures

Autor:	Sona Moradi, Savvas G. Hatzikiriakos, Peter Englezos
Rok vydání:	2014
Předmět:	Nanostructure Materials science Laser ablation business.industry Surfaces and Interfaces Condensed Matter Physics Gibbs free energy Contact angle symbols.namesake Hysteresis Optics Nano Electrochemistry symbols General Materials Science Lotus effect Wetting Composite material business Spectroscopy
Zdroj:	Langmuir. 30:3274-3284
ISSN:	1520-5827 0743-7463
Popis:	A two-dimensional (2D) thermodynamic model is proposed to predict the contact angle (CA) and contact angle hysteresis (CAH) of different types of surface geometries, particularly those with asperities having nonflattened tops. The model is evaluated by micro/nano sinusoidal and parabolic patterns fabricated by laser ablation. These microstructures are analyzed thermodynamically through the use of the Gibbs free energy to obtain the equilibrium contact angle (CA) and contact angle hysteresis (CAH). The effects of the geometrical details of two types of microstructures on maximizing the superhydrophobicity of the nanopatterned surface are also discussed in an attempt to design surfaces with desired and/or optimum wetting characteristics. The analysis of the various surfaces reveals the important geometrical parameters that may lead to the lotus effect (high CA150° and low CAH10°) or petal effect (high CA150° and high CAH ≫ 10°).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e1d0ffb3f11c5e3f7c797f2ced5a3c7 https://doi.org/10.1021/la500277n Zobrazit plný text záznamu