Dielectrophoretic particle chromatographie (DPC) at preparative scale (SPP 2045)
Image : Electric field below electrodes. In an inhomogeneous electric field a polarizable particle gets influenced by dielectrophoresis.
Image : Principle of dielectrophoretic particle chromatography. The electrical field is pulsed (activated/deactivated).
Activated electrical field: Particles get accelerated due to dielectrophoretic force. Deactivated electrical Field: Due to gravity and diffusion, particles move back into the fluid. The forces shown depend upon the size of the particles and thus enable a chromatographic separation of the particles.
Schematic diagram of the dielectrophoretic particle chromatography. The separation process is based on different mobilities of the particles in a inhomogeneous electrical field.
Image: Microfluidic device for dielectrophoretic particle chromatography. A constant fluid flow carries particles through a meandering channel. The bottom of the channel is given by an array of electrodes on top of a transparent substrate.