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Identification of the interfacial energies determined by the Gibbs adsorption integral in solid-liquid-vapour systems

Author(s): Ahmed Kamel Helmy*, Eladio A.Ferreiro

It is shown that the Gibbs adsorption integral yields differences of certain interfacial energies in solid-liquid-vapour systems, namely (S-SV), (S- SL) and (SV-SL), where S, SV and SL are the solid surface energy at zero vapour pressure, the solid-vapour interfacial energy atmonolayer coverage and the solid-liquid interfacial energy respectively. It is also shown that the liquid-solid contact angle could be obtained by evaluating the integral in the range of vapour pressures between saturation and monolayer coverage.

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