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Issue 27, 2008
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Characterization of rough surfaces with vibrated drops

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Wetting transitions were studied with vertically-vibrated drops on various artificial and natural rough substrates. Alternative pathways of wetting transitions were observed. The model of wetting transition is presented. Multiple minima of the Gibbs free energy of a drop deposited on a rough surface explain alternative pathways of wetting transitions. We demonstrate that a wetting transition occurs when the constant force resulting from vibrations, Laplace and hydrostatic pressure acts on the triple line. It is shown that the final wetting states are mainly the Cassie impregnating wetting state with water penetrating the pores in the outer vicinity of the droplet or the Wenzel state with water inside the pores under the droplet whereas the substrate ahead the drop is dry.

Graphical abstract: Characterization of rough surfaces with vibrated drops

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Publication details

The article was received on 04 Jan 2008, accepted on 16 Apr 2008 and first published on 28 May 2008

Article type: Paper
DOI: 10.1039/B800091C
Citation: Phys. Chem. Chem. Phys., 2008,10, 4056-4061
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    Characterization of rough surfaces with vibrated drops

    E. Bormashenko, R. Pogreb, T. Stein, G. Whyman, M. Erlich, A. Musin, V. Machavariani and D. Aurbach, Phys. Chem. Chem. Phys., 2008, 10, 4056
    DOI: 10.1039/B800091C

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