Capillary attraction of colloidal particles at an aqueous interface.
We study the capillary forces arising from charged colloidal particles trapped at an oil-water interface. Since it is quadratic in the electric field, the electric stress acting on the interface cannot be written as the superposition of one-particle terms. Indeed, we find that the interfacial pressure is dominated by two-particle terms, which induce capillary forces involving one, two, three, or four particles. The dominant interaction is attractive and varies with the inverse cube of the particle distance.
Würger
Alois
A
CPMOH, CNRS-Université Bordeaux 1, 351 cours de la Libération, 33405 Talence, France.
Foret
Lionel
L