Fig. 3.
Imbuing oleophobicity to natural surfaces. (A) Droplets of rapeseed oil (γlv = 35.7 mN/m), colored with oil red O, on a duck feather dip-coated in a solution of fluorodecyl POSS. (B) Droplets of octane (γlv = 21.7 mN/m) on a lotus leaf dip-coated in a solution of fluorodecyl POSS. (C) Droplets of water (γlv = 72.1mN/m), methylene iodide (γlv = 50.1 mN/m), methanol (γlv = 22.7 mN/m), and octane (γlv = 21.7 mN/m) on a lotus leaf surface covered with electrospun fibers (beads-on-strings morphology) of PMMA + 44 wt% fluorodecyl POSS. A reflective surface is visible underneath all droplets, indicating the presence of microscopic pockets of air and the formation of a composite interface (21).