Simultaneously, on the right axis, using contact angles values obtained from Figure , we estimate Γ. Despite minor quantitative differences, a good qualitative match is observed -as interfacial interactions becomes weaker the nucleation barrier reduces. We attribute the minor deviation in behavior of Γ and σ min σ min,bulk between ε * = 0.875 and ε * = 1.0 to the fundamental description of these two parameters: Γ is based on thermodynamic considerations while the pressure ratio is a purely mechanical quantity. More rigorous investigations are necessary to ascertain the exact cause of this quantitative deviation.