Title :
Simultaneous pumping and density-selective particle focusing using AC-driven electro-osmotic micropumps
Author :
Hilber, W. ; Weiss, B. ; Saeed, A. ; Lederer, T. ; Jakoby, B.
Author_Institution :
Inst. for Microelectron. & Microsensors, Johannes Kepler Univ. Linz, Linz, Austria
Abstract :
In this contribution we present a novel concept of density-selective particle focusing in microchannels, based on the tunable ratio of viscous drag, inertial and dielectrophoretic forces. The latter are induced by arrowhead-shaped, stepped electrode arrays in the channel, which, driven by AC voltages, enable so-called 3D-AC-electro-osmotic pumping (3D-ACEO). By adjusting the operation parameters of the pump, particle mixtures can be pumped and separated at the same time.
Keywords :
electrophoresis; microchannel flow; micropumps; osmosis; 3D-AC-electro-osmotic micropumps; density-selective particle focusing; dielectrophoretic forces; inertial forces; microchannels; particle mixtures; stepped electrode arrays; tunable ratio; viscous drag; Dielectrophoresis; Drag; Electrodes; Etching; Fluid dynamics; Glass; Microchannel; Micropumps; Pumps; Voltage; dielectrophoresis; electro-osmosis; particle separation;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference, 2009. TRANSDUCERS 2009. International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4244-4190-7
Electronic_ISBN :
978-1-4244-4193-8
DOI :
10.1109/SENSOR.2009.5285893
