BOUNDS ON CONTACT ANGLE HYSTERESIS OF TEXTURED SUPER-HYDROPHOBIC SURFACES

This paper presents the fabrication of rough super-hydrophobic surfaces, dynamic measurements of sliding angles of water droplets, and a modeling approach to estimate bounds on contact angle hysteresis—the major dissipative mechanism in droplet based microfluidic systems. We investigate the dependence of hysteresis on texture parameters, evaluate the current model, propose a modification, and show that the two models—current and proposed—are useful bounds on the hysteresis of the surface