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The frequency dependence of DEP capture of 5×109 pfu·ml −1 Bacteriophage T4r at a flow velocity of 0.73 mm·sec−1 with the AC bias fixed at 10 Vpp. (a) The kinetic DEP capture curves of the integrated fluorescence intensity (F) versus time when the AC voltage at different frequencies was turned on (at ~10 sec) and off (at ~85 sec). (b) The maximum DEP (ΔFmax) versus the applied AC frequency from 100 Hz to 1 MHz. The optimum capture was obtained with ~10 kHz AC voltage.
