Resonance Cassie-Wenzel Wetting Transition for Horizontally Vibrated Drops Deposited on a Rough Surface

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• 作者：Edward Bormashenko ; Roman Pogreb ; Gene Whyman ; Mordehai Erlich
• 刊名：Langmuir
• 出版年：2007
• 出版时间：November 20, 2007
• 年：2007
• 卷：23
• 期：24
• 页码：12217 - 12221
• 全文大小：179K
• 年卷期：v.23,no.24(November 20, 2007)
• ISSN：1520-5827

文摘

The transition between the Cassie and Wenzel wetting regimes has been observed under horizontal vibrations ofa water drop placed on the rough micrometrically scaled polymer pattern. The observed transition has a distinctresonance character. The resonance frequencies as established experimentally coincide with the calculatedeigenfrequencies of capillary-gravity standing waves on the drop surface. The resonance Cassie-Wenzel transitionis related to the displacement of the triple line caused by both the inertia force and the increase in the Laplace pressure.This strengthens the idea that the Cassie-Wenzel wetting transition is most likely a 1D affair stipulated by thetriple-line behavior. The study of the vibrated drop deposited on the rough surface supplied valuable informationconcerning the Cassie-Wenzel wetting transition.