Spontaneous changes in contact angle of water and oil on novel flip-flop-type hydrophobic multilayer coatings

- We fabricated multilayers containing rod-like Nafion aggregates by layer-by-layer assembly.
- The multilayers demonstrated spontaneous changes in contact angle for both water and oil.
- SiO2 fine particles were used as a rough primer layer to enhance water and oil repellency of the multilayers.
- The multilayers showed practical degrees of hydrophobicity in air and oleophobicity in water.