Fig. 3: Multiaxial liquid repellency of the HSG structure and oil-based cleaning of sticky dust. | Nature Communications

Fig. 3: Multiaxial liquid repellency of the HSG structure and oil-based cleaning of sticky dust.

From: Multiaxial oil-repellent surfaces for self-cleaning of sticky dust and enhanced photovoltaic efficiency

Fig. 3

a Sessile drop images of water (top left), olive oil (top right), and hexadecane (bottom) on the HSG surface, demonstrating superomniphobic behavior. b Optical images of UV-active olive oil droplets on the top and side surfaces of the HSG, illustrating multiaxial repellency. c Stills from a movie (Movie S1) showing the lateral spreading test with olive oil. d Schematic illustration of lateral repellency mechanism based on Laplace pressure at triangular tip gaps. e Immersion test in olive oil showing stable air entrapment within HSG cavities. Localized defects (yellow) do not trigger global wetting. f Cleaning with water: Contaminants remain on the surface after rinsing. g Cleaning with oil: The same surface is restored by oil-based cleaning, with contaminants removed.

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