Abstract
A simple 1D locally electroneutral (LEN) electro-diffusive model
explains steady-state fluidic rectification in terms of asymmetry in the
diffusion layers flanking a charge-selective element such as a porous
membrane or nano-pore. The selectivity in such systems is a function of
the diffusion layer asymmetry and applied voltage. Rectification is
experimentally demonstrated in a microfluidic system utilizing a charge
selective membrane with symmetric nanopores where the asymmetry of the
diffusion layers is attributed to the geometric asymmetry in the fluidic
portion of the system. Results for devices with different cross-sections
on either side of the membrane verify that increasing asymmetry in the
geometry, hence diffusion layers, increases the strength of the observed
rectification as predicted by the theory.
Original language | English |
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Title of host publication | APS March Meeting 2010 |
Volume | 2010 |
State | Published - 2010 |