title: Dielectrophoretic particle-particle interaction under AC electrohydrodynamic flow conditions.
abstract: We used the Maxwell stress tensor method to understand dielectrophoretic particle-particle interactions and applied the results to the interpretation of particle behaviors under alternating current (AC) electrohydrodynamic conditions such as AC electroosmosis (ACEO) and electrothermal flow (ETF). Distinct particle behaviors were observed under ACEO and ETF. Diverse particle-particle interactions observed in experiments such as particle clustering, particles keeping a certain distance from each other, chain and disc formation and their rotation, are explained based on the numerical simulation data. The improved understanding of particle behaviors in AC electrohydrodynamic flows presented here will enable researchers to design better particle manipulation strategies for lab-on-a-chip applications.
authors.affiliation: Mechanical Engineering and Mechanics, Drexel University, Pennsylvania, PA, USA.
authors.forename: Doh-Hyoung
authors.initials: DH
authors.lastname: Lee
authors.forename: Chengjie
authors.initials: C
authors.lastname: Yu
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Papazoglou
authors.forename: Bakhtier
authors.initials: B
authors.lastname: Farouk
authors.forename: Hongseok M
authors.initials: HM
authors.lastname: Noh
mesh_terms: D004560:Electricity; D053841:Electroosmosis; D004586:Electrophoresis / Q000379:methods*; D046210:Microfluidic Analytical Techniques / Q000379:methods*; D008962:Models, Theoretical