Destructed double-layer and ionic charge separation near the oil-water interface

Details Destructed double-layer and ionic charge separation near the oil-water interface Destructed double-layer and ionic charge separation near the oil-water interface

2007-05-16

arxiv.org/abs/0705.2327v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures (figure 1a, 1b, 2)

Scientific paper

We study suspensions of hydrophobic charged colloidal spheres dispersed in a demixed oil-water mixture by means of a modified Poisson-Boltzmann theory, taking into account image charge effects and partitioning of the monovalent ions. We find that the ion's aversion for oil can destroy the double layers of the oil-dispersed colloids. This affects the salt-concentration dependence of the colloidal adsorption to the oil-water interface qualitatively. The theory also predicts a narrow range of the oil-dielectric constant in which micron-sized water-in-oil droplets acquire enough charge to crystallize at volume fractions as small as $\sim 10^{-3}$ in the absence of colloids. These findings explain recent observations [M.E. Leunissen {\em et al.}, Proc. Nat. Ac. Sci {\bf 104}, 2585 (2007)].

Affiliated with

Also associated with

No associations

Rating

Destructed double-layer and ionic charge separation near the oil-water interface does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Destructed double-layer and ionic charge separation near the oil-water interface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Destructed double-layer and ionic charge separation near the oil-water interface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-670310