View source for Like-charged particles at a liquid liquid interface

by Tom Kodger
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== Reference ==
M.G. Nikolaides, A.R. Bausch, M.F. Hsu, A.D. Dinsmore, M.P. Brenner, C. Gay, D.A. Weitz and M. Megens, J. Aizenberg ''Nature Communications'' '''424''', August (2003);

== Keywords ==

Dipole, Electrostatics in oil, Interface distortion

== Abstract ==

This communication discusses a simple enigmatic attraction at an oil-water interface between like charged particles.  The original paper (Nature 420, 299-310, 2002) claims that a distortion of the interface due to a diploar electric field induces a long range capillary attraction.  Megens and Aizenberg claims= that this cannot be so due to a fundamental force balance.  In this communcation, these authors claim that the range of the capillary distortion is only short ranged and insignifanct (10^-5 kT).  The original authors then respond by acknowledging that their original response was not complete but defend their original approach of a capillary distortion.  This is true when but only when the free charge density of the oil is accounted for, thus a large dipole imbalance can be created.


== Capillarity In Action ==

1<sup>2</sup>

The original paper claims an attactive potential of,

<math>\U(r) = (F<sup>2</sup>/2 &pi; &gamma;*ln(r/r<sub>0</sub>)</math><br>