Hydrophobic surface is a surface that has the ability to repel water. Generally, the hydrophobicity of a surface can be measured by the contact angle between the droplets of water with the surface itself. The water droplets on the hydrophobic surface will flow very easily and retain its spherical shape with contact angle more than 90 degrees, while superhydrophobic materials possess large contact angles above 150 degrees and difficult to wet. #engineering #technology #materials #science #materia