Figure 6.

Experimental results of PFS at 0.1 V/$\mathsf{\mu }$m of the carrier frequency of the electric field from 1 kHz to 1 MHz with 1 Hz amplitude modulation frequency at 30% modulation amplitude. The vertical dash rad lines $\left(f_c\right)$ represent the crossover frequency at 27 kHz. The vertical dash green line $\left(f_r\right)$ represents the maximum reversal velocity at 220 kHz. The vertical dash purple line $\left(f_f\right)$ represents the maximum forward velocity at 1–5 kHz. (a) Phase delays of a 3 $\mathsf{\mu }$m Janus particle. (b) Speeds of the same 3 $\mathsf{\mu }$m Janus particle. (c) Comparison of the Beta values of the Janus particles measured with trapping (Equation (3)) and without trapping. (d) Drag coefficients determined from the phase delay data.