“…Manipulation of microliter-size droplets is of prime importance in the field of microfluidics 1–4 given its plethora of applications in medical science, 5,6 electronics cooling, 7,8 printing, 9–11 and aerosol formation. 12,13 Active forces such as electric 14–16 and magnetic field forces 17,18 have been extensively used to handle small sample volumes.…”