Fig. 1.

Illustration of the sawtooth gradient insulator-based dielectrophoresis device in side view (Top) and in vertical view (Bottom). Approximately 4 cm long, with a 500 μm wide, 20 μm deep open channel between two reservoirs with electrodes. The channel is constricted to an increasing degree by triangular insulting wall protrusions. These structures induce local increases in electric fields and gradients, providing capturing zones of increasing strength.