Continuous Focusing of Particles by AC-Electroosmosis and Induced Dipole Interactions.

ABSTRACT: Continuous particle focusing by using microfluidics is an effective method for separating particles, cells, or droplets for analytical purposes. Previously, it was shown that an alternating current across rectangular microchannels with slightly deformed side walls results in vortex flow patterns caused by alternating current electroosmosis (AC-EOF) and could lead to particle focusing. In this work, we explore this mechanism by experimentally studying the particle focusing behavior for various fluid flow velocities through a microchannel. Since it is unlikely that the particles are kept in their focused position solely by convection, a theoretical force balance between the hydrodynamic and the induced dipole force was determined. In our experiments, it was found that there is no substantial

SUBMITTER: Wiegerinck HTM 

PROVIDER: S-EPMC11428184 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature