A new method for evaluating the most-stable contact angle using mechanical vibration

Miguel A. Rodríguez-Valverde; Francisco J. Montes Ruiz-Cabello; Miguel A. Cabrerizo-Vílchez

doi:10.1039/C0SM00939C

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A new method for evaluating the most-stable contact angle using mechanical vibration†

Miguel A. Rodríguez-Valverde,*^a Francisco J. Montes Ruiz-Cabello^a and Miguel A. Cabrerizo-Vílchez^a

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* Corresponding authors

^a Biocolloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, Granada, Spain
E-mail: marodri@ugr.es
Fax: +34 95824 3214
Tel: +34 95824 0025

Abstract

We propose a new method for the direct measurement of the most-stable contact angle, using the mechanical vibration of sessile drops from different metastable states. We relaxed sessile drops of identical volume but with different stable contact angles between advancing and receding configurations. Before the vibration, we were able to scan the range of experimentally-accessible drop configurations. In this manner, the most-stable contact angle was experimentally recognized as the observable contact angle unchanged after vibration independent of the previous history (initial state) of the system. We applied this novel strategy to paraffin wax surfaces with a wide range of roughness degree.

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Supplementary files

Fig. S1 Graph of the vibrated contact angle in terms of the amplitude at a fix frequency for advancing and receding drops on a smooth PDMS surface. Fig. S2 Graph of the difference between the vibrated contact angle and the initial contact angle of 150 µl-water drops on a smooth surface of poly(methyl methacrylate) PDF (307K)

Article information

DOI: https://doi.org/10.1039/C0SM00939C
Article type: Communication
Submitted: 07 Sep 2010
Accepted: 08 Oct 2010
First published: 05 Nov 2010

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Soft Matter, 2011,7, 53-56

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A new method for evaluating the most-stable contact angle using mechanical vibration

M. A. Rodríguez-Valverde, F. J. Montes Ruiz-Cabello and M. A. Cabrerizo-Vílchez, Soft Matter, 2011, 7, 53 DOI: 10.1039/C0SM00939C

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Soft Matter

A new method for evaluating the most-stable contact angle using mechanical vibration†

Abstract

Supplementary files

Article information

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A new method for evaluating the most-stable contact angle using mechanical vibration

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