CONTINUOUSLY VARIABLE NODE POSITION IN A HIGH- THROUGHPUT ACOUSTOFLUIDIC DEVICE

Previously, we presented a novel approach to acoustofluidic device design that incorporates a thin wall to longitudinally subdivide the fluid channel, allowing high-quality particle focusing off the channel centerline [1]. Both parts of the channel participate in the acoustic resonance, allowing the resonance to be unconstrained by the dimensions of the separation channel. Here, we demonstrate continuously and arbitrarily tunable node position within a single device, using fluids of different densities in the secondary “bypass” channel.