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Keywords:

  • atomic force microscopy;
  • dielectric layers;
  • electrowetting;
  • ionic liquids;
  • surface chemistry
Thumbnail image of graphical abstract

Electrowetting was achieved on an ionic-liquid-coated (IL) dielectric layer at a driving voltage of just 70 mV and 5 V in AC and DC mode, respectively. AFM studies suggest that the high capacitance density of the ionic-liquid dielectric layer is the reason for the low voltage electrowetting (see picture; OTS=octadecyltrichlorosilane).