How to calculate surface free energy from Neumann's equation of state, where contact angle measurements and liquid interfacial energy is given?

28 February 2024 1 1K Report

ln[Yl(1+cos theta/2)^2] = -2beta(Ys -Yl)^2 +ln(Ys) A plot of the left side of the equation against the liquid interfacial energy gives parabolic curve, and second order fitting is done.

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