title: Persistent droplet motion in liquid-liquid dewetting.
abstract: When a nonvolatile liquid film dewets from a partly compatible liquid substrate, the advancing dewetting front leaves behind droplets formed through a Rayleigh instability mechanism at its rim. We have found that these droplets continue to move in the direction of the dewetting front for extended periods (of order one day) with an initial droplet velocity varying linearly with the droplet size, and a displacement varying logarithmically with time. We attribute this persistent motion to a transient surface tension gradient on the substrate liquid surface trailing the dewetting front.
authors.affiliation: Materials and Interfaces Department, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Matti
authors.initials: M
authors.lastname: Oron
authors.forename: Tobias
authors.initials: T
authors.lastname: Kerle
authors.forename: Rachel
authors.initials: R
authors.lastname: Yerushalmi-Rozen
authors.forename: Jacob
authors.initials: J
authors.lastname: Klein