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Induced-Charge Electrokinetic Phenomena

Outline. Linear vs. nonlinear electrokineticsNew electrokinetic phenomenaBeyond the classical theory. Electrokinetics: particle motion. Non-conducting viscous liquid,e.g. oil drops in air, Millikan 1900. Electrolyte (salt solution)e.g. clay particles in water, Reuss 1808. ?. The Electrochemical Double Layer.

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Induced-Charge Electrokinetic Phenomena

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    1. Induced-Charge Electrokinetic Phenomena Martin Z. Bazant Mechanical Engineering & ICME, Stanford Mathematics, MIT (1998-2008)

    2. Outline Linear vs. nonlinear electrokinetics New electrokinetic phenomena Beyond the classical theory

    3. Electrokinetics: particle motion

    4. The Electrochemical Double Layer

    5. Electrokinetic phenomena in electrolytes Redo (a) tro show bulk flowRedo (a) tro show bulk flow

    6. Linear Electrokinetic Phenomena

    7. Nonlinear Electrokinetic Phenomena

    8. Induced-Charge Electro-osmosis Refs at endRefs at end

    9. Thin-double-layer, low-voltage theory

    10. Double-layer polarization and ICEO flow

    11. ICEO Experiments

    12. Outline Linear vs. nonlinear electrokinetics New electrokinetic phenomena Beyond the classical theory

    13. Induced-Charge Electrophoresis = ICEO swimming by broken symmetry

    14. An ICEO Pinwheel

    15. ICEP Experiments

    16. ICEP of Janus particles in NaCl

    17. Wall Interactions in ICEP

    18. ICEO in Microfluidics

    19. ICEO flow over electrodes

    20. Electrode-array ACEO pumps

    21. Breakdown of the Classical Theory

    22. Outline Linear vs. nonlinear electrokinetics New electrokinetic phenomena Beyond the classical theory

    23. Ion crowding at large voltages

    24. Modified Poisson-Nernst-Planck equations

    25. 1. Steric effects on charging dynamics

    26. Simple theory of ACEO flow reversal due to ion crowding

    27. 2. Charge-induced thickening

    28. Modified Helmholtz-Smoluchowski formula Bazant, Kilic, Ajdari (2006-2008).

    29. Implication: Ion-specific electrophoretic mobility

    30. Conclusion Induced-charge electrokinetics is an exciting new area of physics applied mathematics, and engineering.

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