Figure 6.
Capture and release of yeast cells. (a), (b) Capture of yeast cell by positive DEP at medium conductivity of 2 μS/cm. Yeast cells were collected between upper electrode and lower electrode where the electric field strength was highest. Flow was driving by difference of water level between inlet and outlet. The applied AC signal was 5 Vpp at 50 kHz and the channel height was 15 μm. (c)–(f) Release of yeast cells by applying DC field of 700 V/m after collection of yeast cells for 55 s. These figures demonstrated that yeast cells travelled in the same direction as the electric field.