An array of microelectrodes covered in an electrolyte and energized by a traveling-wave potential produces net movement of the fluid. Arrays of platinum microelectrodes of two different characteristic sizes have been studied. For both sizes of arrays, at low voltages (<2 V pp) the electrolyte flow is in qualitative agreement with the linear theory of ac electroosmosis. At voltages above a thres...

A conical nanopore was developed that allowed the ionic current to be gated by external application of electrical potential. A numerical model of the pore was created in COMSOL to elucidate the mechanism of action in this pore. The model is composed of a conical nanopore geometry with a gold-plated Si3N4 structure and a complete Gouy-Chapman-Stern electrical double layer. The Poisson, NernstPla...

We present a theoretical study of ion transport in microchannels containing nanoporous ion-selective membranes. The developed model includes the effect of water splitting as well as reactions between the liquid and the surface groups on the walls. By numerically solving the full PNP (Poisson–Nernst–Planck) problem coupled with the flow problem, results are obtained both in the simple non-advect...

This analysis is conducted for a theoretical examination of the fluid flow characteristics and heat transferred by nanoparticle-enhanced drilling muds flowing through pipes under various physical conditions. Here, an important type called Aphron consideration which very effective in depleted regions. The rheological are predicted Herschel-Bulkley model. driven peristaltic pumping further aided ...

Recently, considerable interest and effort have been devoted to the on-site detection of low-concentration pathogenic bacteria in order to deter infectious diseases and bioterrorism. Conventionally, bacteria detection involves culturing, which is time-consuming and unfeasible under field conditions. Microfluidic devices with integrated electrical detection will enable fast, low-cost, and portab...

To enable detailed studies of interactions between nanoparticles and their environment the correlations various nanoparticle properties, one must go beyond ensemble averages toward single-particle measurements. However, current methodologies for single-nanoparticle analysis charge size either lack flexibility to study dynamic processes on level or are highly specific require complex microfluidi...

We describe methods and results of simulations done for predicting behavior of particles in an aqueous solution under an applied AC electric field on electrodes of rectangular and triangular shapes. Here the two major effects which come into play are Dielectrophoresis and AC electroosmosis. Two simulations have been presented, one for rectangular and one for triangular shaped electrodes. Both t...

page 124 Abstract: Nanofluidic channels have many uses in the chemical field, including site specific combinatorial synthesis, macroand bio-molecular analysis, and other “lab on a chip” applications. The objective of this research is to fabricate arrays of nanochannels designed to facilitate the transport of aqueous ionic solutions by adapting a form of the nanoimprinting technique. Nanoimprint...