  Low voltage electrowetting on dielectrics on substrates with thin layer of
lubricating fluid to reduce contact angle hysteresis is reported here. On
smooth and homogeneous solid surfaces, it is extremely difficult to reduce
contact angle hysteresis (contact angle difference between advancing and
receding drop volume cycle) and the electrowetting hysteresis (contact angle
difference between advancing and receding voltage cycle) below 10{\deg}. On the
other hand, electrowetting hysteresis on rough surfaces can be relatively large
(>30{\deg}) therefore they are of no use for most of the fluidic devices. In
the present report we demonstrate that using a thin layer of dielectric
lubricating fluid on top of the solid dielectric surface results in drastic
reduction in contact angle hysteresis as well as electrowetting hysteresis (<
2{\deg}) on smooth as well as rough surfaces. Subsequently fitting the
Lippmann-Young electrowetting equation to the experimental electrowetting data
reveal that the dielectric lubricating fluid layer is only responsible for
smooth movement of the three phase contact line of the liquid drop and does not
affect the effective specific capacitance of the system.
