Concentration polarization induced electro-osmosis around a charged dielectric microchannel corner
Hui Zhao, Xiangchun Xuan, Ning Wu
Abstract
Theory and simulation are used to demonstrate that the concentration polarization induced electro-osmotic (CPEO) flow is the origin of the experimentally observed nonlinear electrokinetic flow near a charged dielectric corner. The CPEO explains many experimentally observed electrokinetic phenomena that cannot be captured by existing electrokinetic theories. The CPEO can become a versatile technique in the microfluidic toolbox and open many new possibilities to use dielectric structures for fluidic flow control.
Topics & Concepts
MicrochannelElectro-osmosisDielectricMaterials scienceConcentration polarizationPolarization (electrochemistry)Forward osmosisMechanicsMembraneReverse osmosisOptoelectronicsChemistryPhysicsNanotechnologyChromatographyElectrophoresisBiochemistryPhysical chemistryMicrofluidic and Capillary Electrophoresis ApplicationsMicrofluidic and Bio-sensing TechnologiesElectrohydrodynamics and Fluid Dynamics