Resonant oscillation of droplets under an alternating electric field to enhance solute diffusion.

ABSTRACT: This study investigates a novel microfluidic mixing technique that uses the resonant oscillation of coalescent droplets. During the vertical contact-separation process, solutes are initially separated as a result of the combined effects of diffusion and gravity. We show that the application of alternating current (AC) voltage to microelectrodes below the droplets causes a resonant oscillation, which enhances the even distribution of the solute. The difference in concentration between the top and bottom droplets exhibits frequency dependence and indicates the existence of a particular AC frequency that results in a homogeneous concentration. This frequency corresponds to the resonance frequency of the droplet oscillation that is determined using particle tracking velocimetry. To understand

SUBMITTER: Bono S 

PROVIDER: S-EPMC11393098 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature