Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 109, Issue 34, Pages 16435-16438Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp052133i
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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.
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