Surface Tension and Wetting: Solid/Liquid/Gas Interfaces

This lecture covers the concepts of surface tension and wetting at solid/liquid/gas interfaces, including contact angles, triple lines, and the law of Laplace. It discusses different scenarios such as good and bad wetting, total wetting, and non-stationary situations. The lecture also explores the forces acting on the half-sphere and the overpressure inside balloons. Additionally, it delves into the hydrophobicity of water and the spherical nature of surfaces, providing insights into the equilibrium of forces and the main values of curvature. Practical examples involving glass, mercury, air, and soap are used to illustrate these concepts.