Evaporation of Sessile Water Droplets on Superhydrophobic Natural Lotus and Biomimetic Polymer Surfaces

Abstract

An exceptional evaporation pattern is observed on special micro–nano hierarchically structured superhydrophobic natural lotus and biomimetic polymer surfaces. The evaporation process is simulated by the ellipsoidal cap-geometry model, which fits the experimental data well. The picture shows the contact angle (CA) and the height (h) of a water droplet on a natural lotus surface versus the evaporation time based on the ellipsoidal (+) and spherical (×) models.