Fig. 1: Schematic and characterization of the HDSG. | Nature Communications

Fig. 1: Schematic and characterization of the HDSG.

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

Fig. 1

a SEM image of a springtail insect. b Magnified SEM view of the springtail’s cuticle. c Optical microscopy image of the fabricated hyperbolic domed star grid (HDSG). d Cross-sectional SEM image of a single HDSG pillar. e–g Fabrication process of the HDSG: e Initial star grid (SG) microstructures with straight sidewalls. f Transformation into a hyperbolic star grid (HSG) with hyperbolic sidewalls via capillary wrapping. g Final dome-shaped geometry of the HDSG achieved through direct transfer. h–j Schematic representations of HDSG functionality: h Multiaxial liquid repellency. i Superomniphobicity via air entrapment. j Lateral repellency that prevents liquid penetration.

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