Electroosmotic pumps have been prepared using macroporous polymer monoliths with their pore surface grafted with the ionizable monomers 2-acrylamido-2-methyl-1-propanesulfonic acid and [2-(methacryloyloxy)ethyl]trimethyl ammonium chloride, respectively. The effects of critical parameters such as pore size of the monolith, percentage of ionizable moieties in the grafted layer, crosslinking densi...

Micromixers have important applications in various pharmaceutical and medical fields. In the present study, enhancement of mixing index electroosmotic micromixer with different geometries is investigated. The commercial software COMSOL Multiphysics 5.4 employed to solve mathematical models. SIMPLEC
 algorithm for coupling velocity pressure A second-order upwind scheme used reduce artificia...

Field amplified sample stacking (FASS) is used to increase sample concentrations in electrokinetic flows. The technique uses conductivity gradients to establish a non-uniform electric field that accumulates ions within a conductivity gradient, and can be readily integrated with capillary electrophoresis. Conductivity gradients also cause gradients in near-wall electroosmotic flow velocities. Th...

This paper investigates the operational factors that affect an integrated electrochemical remediation (IECR) process for the degradation and removal of both organic and heavy metal contaminants in low permeability soils. IECR aims to degrade the organic contaminants through chemical oxidation process and at the same time remove the heavy metals through electromigration. Hydrogen peroxide is use...

A difficulty with the design and operation of an electrokinetically operated DNA hybridization microfluidic chip is the opposite direction of the electroosmotic flow and electrophoretic mobility of the oligonucleotides. This makes it difficult to simultaneously deliver targets and an appropriate hybridization buffer simultaneously to the probe sites. In this work we investigate the possibility ...

In this paper, a simple but accurate modeling method for obtaining analytical solutions for the fundamental characteristics of electroosmotic ow through rectangular pumping channels without the Debye–Hückel approximation is presented. The Poisson–Boltzmann equation without the ebye–Hückel approximation for the electric potential distribution and the momentum equation for the velocity profile ar...

Control of EOF in microfluidic devices is essential in applications such as protein/DNA sizing and high-throughput drug screening. With the growing popularity of poly(methyl methacrylate) (PMMA) as the substrate for polymeric-based microfludics, it is important to understand the effect of surfactants on EOF in these devices. In this article, we present an extensive investigation exploring chang...

The electroosmotic flow (EOF) in a poly(dimethylsiloxane) (PDMS) separation channel can be altered and controlled by adding a carboxylic acid to the prepolymer prior to curing. When the prepolymer is doped with 0.5 wt % undecylenic acid (UDA), the electroosmotic mobility in a modified PDMS channel rises to (7.6 +/- 0.2) x 10(-4) cm(2) V(-1) s(-1) (in HEPES buffer at pH 8.5), which is nearly twi...

S. Devasenathipathy and J.G. Santiago The advent of microfabricated chemical analysis systems has led to a growing interest in microfabricated fluidic systems with characteristic scales in the range of a micron to a millimeter. A motivation to integrate components in a manner analogous to modern microelectronics is coupled with a potential for achieving massively parallel functions, and the fie...