Ultralow Voltage Electrowetting on a Solidlike Ionic-Liquid Dielectric Layer

摘要

Electrowetting has been widely used in devices like e-ink displays, digital microfluidics, liquid lens, and microelectricity generators, in which a 50-200 V driving voltage is used. A lower driving voltage would offer better device stability. Here, we demonstrate electrowetting effects on an ionic-liquid (IL) dielectric layer using driving voltage of just 70 mV and 5 V in alternating and direct current (AC and DC) mode, respectively. Our data suggest that the ultrahigh capacitance of the IL dielectric layer directly leads to the low-voltage electrowetting.