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. 2013 Mar 20;7(2):024106. doi: 10.1063/1.4795856

Figure 7.

Figure 7

Collection and release of E. coli. (a), (b) Collection of E. coli by negative DEP at medium conductivity of 380 μS/cm at t = 0 s and t = 120 s, respectively. AC signal of 15 Vpp at 50 kHz was applied in the channel of 15 μm in depth; (c), (d) Collection of E. coli by positive DEP at medium conductivity of 2 μS/cm and release of E. coli after trapping for 1 min. E. coli bacteria were collected between upper electrode and lower electrode in 8c. The applied AC signal was 10 Vpp at 50 kHz and the channel height was 15 μm. The applied DC field for releasing was 700 V/m.