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Updated: Jun 22, 2026
Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
Published on: June 14, 2019
Sliding of water droplets on the superhydrophobic surface with ZnO nanorods
Munetoshi Sakai1, Hiroki Kono, Akira Nakajima
1Kanagawa Academy of Science and Technology, 308 East, Kanagawa Science Park, 3-2-1 Sakado, Takatsu-ku, Kawasaki-shi, Kanagawa 213-0012, Japan.
Abstract:
In this study, we prepared various superhydrophobic surfaces using ZnO nanorod arrays (ZnO-NR) of different diameters. The contact angle was equivalent to the calculated value if it is assuming that the topmost surface of the rods is a solid-liquid contact area. On the superhydrophobic ZnO-NR surfaces, the 5 microL water droplets slid down by constant acceleration motion. Sliding acceleration was governed by the solid area fraction. The resistance force of the actual measurement was consistent with that calculated using the model.
