Acrivos A. – TechConnect Briefs

A platform for assembly of electro-hydrodynamic microfluidics

Kumar A., Khusid B., James C., Acrivos A., New Jersey Institute of Technology, US

Current approaches to build electro-hydrodynamic microfluidic devices involve the employment of standard photolithography methods in clean room environment [1] or/and the use of polymer-based manufacturing techniques [2]. Both of them require multiple steps to fabricate [...]

Dynamics and distribution of counterions in the vicinity of a flexible polyelectrolyte

Lo T.S., Khusid B., Koplik J., Acrivos A., New Jersey Institute of Technology, US

Transport properties of polyelectrolytes in solution, such as electrophoretic mobilities, are strongly related to the distribution of the counterions in the vicinity of the molecules. When the charge density of the polyelectrolyte is above a [...]

Microfluidic Device for Conventional and Traveling-Wave Dielectrophoresis

Kumar A., Acrivos A., Khusid B., James C.D., New Jersey Institute of Technology, US

Conventional and traveling-wave dielectrophoresis in suspensions are proven techniques for the manipulation, separation, and characterization of suspended particles with potential applications ranging from biological warfare agent detection to healthcare industry. In contrast to previous studies, [...]

Electric Field Driven Motion of Flexible Polyelectrolytes – A Molecular Dynamics Study

Lo T.S., Khusid B., Acrivos A., Koplik J., New Jersey Institute of Technology, US

Our work aims to develop multi-scale computational procedures for simulating the dielectrophoretic behavior of biomolecules in micro- and nano-electrofluidics, which combine electrohydrodynamics with molecular theories for the macromolecule polarization caused by the distortion of the [...]

Multiscale Modeling of Nanoflows

Drazer G., Acrivos A., Khusid B., Koplik J., New Jersey Institute of Technology, US

Using molecular dynamics simulations, we identified in previous work a new adsorption phenomenon in which, for poorly wetting fluids, a suspended particle, initially moving along the center of the nanochannel, is adsorbed onto the tube [...]

Strong DC and Low-Frequency AC Fields for the Manipulation of Particles and Fluids in Microfluidics

Kumar A., Qiu Z., Khusid B., Yeksel M., Acrivos A., New Jersey Institute of Technology, US

Electroosmosis and electrophoresis are considered to be the main phenomena for transport of aqueous liquids and particles in microfluidic devices because field-based techniques do not require any moving parts and can be incorporated more favorably [...]

Field-induced Dielectrophoresis and Phase Separation for Manipulating Particles in Microfluidics

Bennett D.J., Khusid B., James C.D., Galambos P.C., Okandan M., Jacqmin D., Kumar A., Qiu Z., Acrivos A., New Jersey Institute of Technology, US

We report observations of new many-body phenomena in the micro-scale behavior of a suspension subject to a high-gradient strong alternating current (ac) field and shear. Their origin is dielectrophoresis accompanied by the field-induced phase separation [...]

Authors: Acrivos A.