2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126350The nature of electrostatic interaction between like-charged particles at water-air interface is analyzed in this paper. We show that long-ranged electrostatic dipolar attraction between these objects generally exists. Our result provides a natural mechanism to explain the experimental observations of attraction between like-charge species trapped at water-air interface. We speculate that a similar (but presumably weaker) mechanism also exists for particles near water-solid interface.4 pages, 3 figuresSoft Condensed Mattertext