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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
Published on: September 7, 2018
Electrokinetic transport and separations in fluidic nanochannels
Zhen Yuan1, Anthony L Garcia, Gabriel P Lopez
1Center for Biomedical Engineering, Department of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131, USA.
Electrophoresis
|February 17, 2007
Summary
Electrokinetic transport in nanochannels is influenced by the electric double layer, leading to unique ionic transport and molecular separation. This review covers theory, experiments, and applications of these phenomena.
Area of Science:
- Physics, Physical Chemistry
- Nanotechnology
- Fluid Dynamics
Background:
- The electric double layer (EDL) significantly impacts fluid behavior in nanoscale systems.
- Understanding electrokinetic phenomena in nanochannels is crucial for developing advanced separation and transport technologies.
Purpose of the Study:
- To review theoretical and experimental findings on electrokinetic transport in fluidic nanochannels.
- To analyze the influence of the EDL on electroosmotic flow (EOF), electric current, and electrophoresis.
- To explore novel effects and applications arising from nanochannel confinement.
Main Methods:
- Continuum analysis applying classical hydrodynamics and electrodynamics.
- Review of experimental studies on electrokinetic transport in nanochannels.
- Analysis of the impact of EDL thickness relative to nanochannel width.
Main Results:
- EDL effects alter fluid velocity profiles and local ion/analyte distributions.
- Nanochannels exhibit selective ionic transport based on charge number.
- Distinct modes for molecular separation are observed in confined geometries.
Conclusions:
- Confinement in nanochannels leads to unique electrokinetic transport behaviors.
- Nanochannels offer potential for advanced molecular separation and ionic transport applications.
- Ongoing research and nanofabrication advancements drive the utilization of nanochannels.
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