Droplet and Particle Manipulation in Emulsions and Suspensions
Sprache des Titels:
Englisch
Original Buchtitel:
Proc. 21st IEEE International Conference on Micro Electro Mechanical Systems
Original Kurzfassung:
This paper presents investigations on droplet and
particle manipulation in microfluidic channels realized in
SU-8/glass technology, which is based on a competitive
interplay of viscous drag, gravitational, buoyancy and
dielectrophoretic forces. The latter are induced by
alternating current (AC) driven three-dimensional (3D)
stepped electrode arrays in the channel, enabling so called
3D AC electro-osmotic pumping, as it has been proposed
recently. Due to size- and density-dependent
differences in polarizability, targeted particles resp.
droplets in the fluid stream can be slowed down or even
pinned above the electrode structures by adjusting the
operation parameters of the pump. Hence the presented
device can be utilized for simultaneous pumping and
manipulation of droplets and particles in emulsions and
suspensions.