Effects of anion size and concentration on electrolyte invasion into molecular-sized nanopores

Details Effects of anion size and concentration on electrolyte invasion into molecular-sized nanopores Effects of anion size and concentration on electrolyte invasion into molecular-sized nanopores

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12c3021l&link_type=abstract

New Journal of Physics, Volume 12, Issue 3, pp. 033021 (2010).

Physics

Scientific paper

When an electrolyte solution is pressurized into a molecular-sized nanopore, oppositely charged ions are strongly inclined to aggregate, which effectively reduces the ion solubility to zero. Inside the restrictive confinement, a unique quasi-periodic structure is formed where the paired ion couples are periodically separated by a number of water molecules. As the anion size or ion concentration varies, the geometrical characteristics of the confined ion structure would change considerably, leading to a significant variation in the transport pressure. Both experimental and simulation results indicate that, contradictory to the prediction of conventional theory, infiltration pressure decreases as the anions become larger.

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