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Issue 45, 2013
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From adhesion to wetting of a soft particle

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Using a thermodynamical approach, we calculate the deformation of a spherical elastic particle placed on a rigid substrate, under zero external load, and including an ingredient of importance in soft matter: the interfacial tension of the cap. In a first part, we limit the study to small deformation. In contrast with previous studies, we obtain an expression for the energy that precisely contains the JKR and Young–Dupré asymptotic regimes, and which establishes a continuous bridge between them. In the second part, we consider the large deformation case, which is relevant for future comparison with numerical simulations and experiments on very soft materials. Using a fruitful analogy with fracture mechanics, we derive the exact energy of the problem and thus obtain the equilibrium state for any given choice of physical parameters.

Graphical abstract: From adhesion to wetting of a soft particle

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The article was received on 28 Jun 2013, accepted on 14 Aug 2013 and first published on 12 Sep 2013

Article type: Paper
DOI: 10.1039/C3SM51780B
Soft Matter, 2013,9, 10699-10704

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    From adhesion to wetting of a soft particle

    T. Salez, M. Benzaquen and É. Raphaël, Soft Matter, 2013, 9, 10699
    DOI: 10.1039/C3SM51780B

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