Figure 3
From: Deflection of sliding droplets by dielectrophoresis force on a superhydrophobic surface
Contact angle and contact angle hysteresis under voltages and dynamic motion. (A) Blue line is the apparent contact angle under different voltages. Red line is the contact angles on the flat surface estimated by the LDEP form of Young-Lippmann Equation. Inset image: a water droplet at 0 V, where the apparent contact angle of the surface is 155°. (B) Contact angles responding time at different applied voltages. (C) Experimental setup of the motorized stage where the water droplet is placed between. To engender hydrophilicity on the upper slide glasses for pulling droplets, a piece of paper was adhered to the slide glass, followed by recording the dynamic contact angles. (D, E) With sliding speed 125 mm/s, the relation of CAH, advancing and receding angles versus voltages at two kinds of electrode orientation respectively.
