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.
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Zhang et al. (2006) studied this question.
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