Three smooth silane coatings with different hydrophobicity (ODS, FAS3, and FAS17) were prepared on Si substrate. Impact and sliding behavior of water droplets on each surface were investigated. The removal of a water droplet becomes faster as the impact velocity become larger, however the effect of inertia energy saturated beyond the certain impact velocity. Comparing the ODS and FAS17 coatings, order of the removal time reversed depending on the impact velocity of the droplet.
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