Iterative Dipole Moment Method for the Dielectrophoretic Particle-Particle Interaction in a DC Electric Field

Abstract

Electric force is the most popular technique for bioparticle transportation and manipulation in microfluidic systems. In this paper, the iterative dipole moment (IDM) method was used to calculate the dielectrophoretic (DEP) forces of particle-particle interactions in a two-dimensional DC electric field, and the Lagrangian method was used to solve the transportation of particles. It was found that the DEP properties and whether the connection line between initial positions of particles perpendicular or parallel to the electric field greatly affect the chain patterns. In addition, the dependence of the DEP particle interaction upon the particle diameters, initial particle positions, and the DEP properties have been studied in detail. e conclusions are advantageous in elelctrokinetic microfluidic systems where it may be desirable to control, manipulate, and assemble bioparticles.

Research on the coagulation law of dielectric nanoparticles in Stokes regime via Taylor expansion moment method

“…The iterative dipole moment (IDM) method was used to calculate the interaction of the particle-particle dielectrophoretic force in a two-dimensional DC electric field. The Lagrangian method was used to solve the particle transport [22]. Motors in complex, fluctuating environments can actively assemble into dynamic clusters and other unique nonequilibrium states.…”

Length-Selective Dielectrophoretic Manipulation of Single-Walled Carbon Nanotubes

“…Dielectrophoresis (DEP) has in recent years achieved prominence as a powerful tool for nanoparticle separation. − DEP has been used to capture proteins, nucleic acids, as well as other biomolecules, − and also carbon nanotubes as we and others reported previously. ,,,− Dielectrophoresis has also been employed to sort SWNTs according to their dielectric properties . When a cylindrical SWNT is introduced into a nonuniform electric field, it will experience a force due to the induced dipole moment. ,, The DEP force acting on a cylindrically shaped SWNT can be expressed as where r refers to the SWNT radius, l to its length, E to the electric field, and ε m to the permittivity of the suspending medium.…”