title: Dielectrophoresis of an inhomogeneous colloidal particle under an inhomogeneous field: a first-principles approach.
abstract: In reality, colloidal particles often possess an arbitrary inhomogeneity profile. We present a first-principles approach to dielectrophoresis of such an inhomogeneous colloidal particle under an inhomogeneous field of an oscillating electric dipole moment. For numerical simulations, we treat the inhomogeneous particle as a specific graded one with a physically motivated dielectric model and conductivity profile. We find that both multipolar interactions and spatial fluctuations inside the particle can affect the dielectrophoretic spectrum of the particle significantly.
authors.affiliation: Surface Physics Laboratory (National Key Laboratory) and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: C Z
authors.initials: CZ
authors.lastname: Fan
authors.forename: J P
authors.initials: JP
authors.lastname: Huang
authors.forename: K W
authors.initials: KW
authors.lastname: Yu
mesh_terms: D003102:Colloids; D004586:Electrophoresis / Q000379:methods*
chemical_list: D003102:Colloids