title: Lateral capillary interactions between colloids beneath an oil-water interface that are driven by out-of-plane electrostatic double-layer interactions.
abstract: We study the lateral capillary interactions between colloids beneath an oil-water interface that lead to closely packed two-dimensional self-assembled colloidal crystals. These capillary forces are caused by the overlap of deformed interfaces above colloids on a solid substrate. The interface deformation is due to the electrostatic disjoining pressure between the charged particles and the charged oil-water interface. It is notable that the short-range (i.e., on the nanometer scale) and out-of-plane electrostatic double-layer interactions, which occur through an aqueous phase, can generate the long-range lateral capillary attraction (i.e., on the micrometer scale).
authors.affiliation: Department of Chemical Engineering, Kyung Hee University, Yongin, 17104, South Korea. bjpark@khu.ac.kr.
authors.forename: Bum Jun
authors.initials: BJ
authors.lastname: Park
authors.affiliation: Department of Chemical Engineering, Kyung Hee University, Yongin, 17104, South Korea. bjpark@khu.ac.kr.
authors.forename: Mina
authors.initials: M
authors.lastname: Lee
authors.affiliation: Department of Chemical Engineering, Kyung Hee University, Yongin, 17104, South Korea. bjpark@khu.ac.kr.
authors.forename: Bomsock
authors.initials: B
authors.lastname: Lee
authors.affiliation: Department of Chemical and Biomolecular Engineering and Center for Molecular & Engineering Thermodynamics, University of Delaware, Newark, Delaware 19716, USA.
authors.forename: Eric M
authors.initials: EM
authors.lastname: Furst