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Keywords:

  • microfluidics;
  • patterned surfaces;
  • wetting;
  • superhydrophobic materials
Thumbnail image of graphical abstract

Multiphase liquid droplets consisting of three connected but immiscible liquid phases are demonstrated. The droplets have designer geometries stabilized by surface energy patterns; aqueous phases prefer contact with hydrophilic surface while organic phases prefer contact with hydrophobic areas. The multiphase droplets are applied for liquid-liquid-liquid extraction.