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Steric effects in the dynamics of electrolytes at large applied voltages: II. Modified Poisson-Nernst-Planck equations
Mustafa Sabri Kilic, Martin Z. Bazant, Armand Ajdari
In situations involving large potentials or surface charges, the Poisson Boltzman(PB) equation has shortcomings because it neglects ion-ion interactions and steric effects. This ha…
Steric effects in the dynamics of electrolytes at large applied voltages: I. Double-layer charging
Mustafa Sabri Kilic, Martin Z. Bazant, Armand Ajdari
The classical Poisson-Boltzmann (PB) theory of electrolytes assumes a dilute solution of point charges with mean-field electrostatic forces. Even for very dilute solutions, however…
Microfluidic Exploration of the Phase Diagram of a Surfactant/Water Binary System
Jacques Leng, Mathieu Joanicot, Armand Ajdari
We investigate the behaviour of a binary surfactant solution (AOT/water) as it is progressively concentrated in microfluidic evaporators. We observe in time a succession of phase t…
Giant amplification of interfacially driven transport by hydrodynamic slip: diffusio-osmosis and beyond
Armand Ajdari, Lyderic Bocquet
We demonstrate that "moderate" departures from the no-slip hydrodynamic boundary condition (hydrodynamic slip lengths in the nanometer range) can result in a very large enhancement…
Micro-evaporators for kinetic exploration of phase diagrams
Jacques Leng, Barbara Lonetti, Patrick Tabeling +2
We use pervaporation-based microfluidic devices to concentrate species in aqueous solutions with spatial and temporal control of the process. Using experiments and modelling, we qu…