ABSTRACT
Wettability is one of the most important properties of a solid surface. Many practical applications depend on the wetting or nonwetting characteristics of the solid surface. When a water drop comes in contact with a surface, the surface is either wetted or not wetted depending on the hydrophilicity or hydrophobicity of the surface, respectively. The degree of wetting is characterized by the angle of contact (θ) the water drop makes with the surface, which is the angle at which the liquid-vapor (LV) interface meets the solid-liquid (SL) interface and the solid-vapor (SV) interface.
