title: Self-Pinning on a Liquid Surface.
abstract: We report on the first experimental evidence of a self-pinning liquid drop on a liquid surface. This particular regime is observed for a miscible heavier oil drop (dichloromethane) deposited on an aqueous solution laden by an ionic surfactant (hexadecyltrimethylammonium bromide). Experimental characterization of the drop shape evolution coupled to particle image velocimetry points to the correlation between the drop profile and the accompanying flow field. A simple model shows that the observed pinned stage is the result of a subtle competition between oil dissolution and surfactant adsorption.
authors.affiliation: Laboratoire de Physique Théorique de la Matière Condensée, Université Pierre et Marie Curie , 4 place Jussieu, 75005 Paris, France.
authors.forename: C
authors.initials: C
authors.lastname: Antoine
authors.affiliation: Laboratoire des Interactions Moléculaires et de la Réactivité Chimique et Photochimique, Université Paul Sabatier de Toulouse , 118 route de Narbonne, 31062 Toulouse Cedex 9, France.
authors.forename: J
authors.initials: J
authors.lastname: Irvoas
authors.affiliation: Technische Universität Dresden, Institute of Fluid Mechanics , D-01062 Dresden, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Schwarzenberger
authors.affiliation: Technische Universität Dresden, Institute of Fluid Mechanics , D-01062 Dresden, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Eckert
authors.affiliation: Laboratoire des Interactions Moléculaires et de la Réactivité Chimique et Photochimique, Université Paul Sabatier de Toulouse , 118 route de Narbonne, 31062 Toulouse Cedex 9, France.
authors.forename: F
authors.initials: F
authors.lastname: Wodlei
authors.affiliation: Laboratoire des Interactions Moléculaires et de la Réactivité Chimique et Photochimique, Université Paul Sabatier de Toulouse , 118 route de Narbonne, 31062 Toulouse Cedex 9, France.
authors.forename: V
authors.initials: V
authors.lastname: Pimienta