Electrically induced colloidal clusters for generating shear mixing and visualizing flow in microchannels.


When aqueous suspensions of 1 μm, negatively charged polystyrene particles are subject to a 1 kHz alternating electric field of strength greater than 7 kV(rms) m(-1), dynamic elliptical clusters of particles spontaneously form. With potential applications in microchannel fluidics in mind, we characterize how cluster formation and particle circulation… (More)
DOI: 10.1021/la202279a