English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Pro

Presents the zaia usage as premium feature

ZAIA

Presents AI Discovery search usage as a premium feature

AI Discovery

Presents AI Discovery explain and summary usage as a premium feature

Content Analysis

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Presents the pdf analysis as premium feature

PDF Analysis

1500 Top-up

3000 Top-up

Zendy Basic

2500 Top-up

Zendy Unlimited

Presents the access of premium content as premium feature

Premium Content

This paper studies mechanism of preconcentration of charged particles in astraight micro-channel embedded with permselective membranes, by numericallysolving coupled transport equations of ions, charged particles and solventfluid without any simplifying assumptions. It is demonstrated that trapping andpreconcentration of charged particles are determined by the interplay betweendrag force from the electroosmotic fluid flow and the electrophoretic forceapplied trough the electric field. Several insightful characteristics arerevealed, including the diverse dynamics of co-ions and counter ions,replacement of co-ions by focused particles, lowered ion concentrations inparticle enriched zone, and enhanced electroosmotic pumping effect etc.Conditions for particles that may be concentrated are identified in terms ofcharges, sizes and electrophoretic mobilities of particles and co-ions.Dependences of enrichment factor on cross-membrane voltage, initial particleconcentration and buffer ion concentrations are analyzed and the underlyingreasons are elaborated. Finally, post priori a condition for validity ofdecoupled simulation model is given based on charges carried by focused chargeparticles and that by buffer co-ions. These results provide important guidancein the design and optimization of nanofluidic preconcentration and otherrelated devices.

Accurate Multi-physics Numerical Analysis of Particle Preconcentration Based on Ion Concentration Polarization