Fig. 5
Frequency dependence of FDEP. The FM-DEP force (FDEP) as a function of external frequency (fAC) of applied AC field where FDEP has been evaluated from Eq. (12), the balance equation between the FM-DEP and hydrodynamic forces exerted on a single MLV. It can be seen that FDEP is increased and saturated as fAC is higher, reflecting a typical behavior of the relaxation spectrum of the real CM factor. The solid line represents the best-fit result of Eq. (13)