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. 2021 Jan 28;6(5):3910–3920. doi: 10.1021/acsomega.0c05776

Figure 8.

Figure 8

Illustration of droplet shapes on the different VFMs (D = 0.3 mm; P = 2D): (a) A droplet sliding down from one side of a vertical filament (w/2 < P – Rf, P is the center-to-center spacing between adjacent filaments, Rf is the radius of the filament); type 1. (b) A droplet sliding down between two adjacent vertical filaments (w/2 > P – Rf); type 2. (c) A liquid filmlike droplet sliding down along three adjacent vertical filaments (w/2 > > P – Rf); type 3. Droplet shape on the hydrophobic VFM, where w is the width of the droplet, Fg is the gravity force, and F is the retention force of the liquid on the solid (reproduced from ref (21). Copyright 2018 American Chemical Society). (d) Droplet shapes on the hydrophilic VFM. (e) Droplet shapes on the lubricated–hydrophilic VFM. (f) Droplet shapes on the 3D VMF.