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Keywords:

  • fractals;
  • hydrophobic effect;
  • polymers;
  • surface chemistry;
  • thin films
Thumbnail image of graphical abstract

Repellent films: Poly(alkylpyrrole) conductive films with a water contact angle larger than 150° are stable to temperature, organic solvents, and oils and are super water-repellent. The surface of the film is a fractal and consists of an array of perpendicular needle-like structures (see picture; inset: digital camera image of a water droplet on the film).