Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 17, Issue 32, Pages L337-L342Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/17/32/L02
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The effective potential between charged colloids trapped at water interfaces is analysed. It consists of a repulsive electrostatic and an attractive capillary part which asymptotically both show dipole-like behaviour. For sufficiently large colloid charges, the capillary attraction dominates at large separations. The total effective potential exhibits a minimum at intermediate separations if the Debye screening length of water and the colloid radius are of comparable size.
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