Summary: Properties of liquid marbles
BY PASCALE AUSSILLOUS
* AND DAVID QUEŽREŽ 2
IUSTI-CNRS UMR 6595 Polytech' Marseille, Technopo^le de Cha^teau-Gombert,
13453 Marseille cedex 13, France
Laboratoire de Physique de la Matie`re CondenseŽe, UMR 7125 du CNRS,
Colle`ge de France, 75231 Paris cedex 05, France
Liquid marbles are liquid drops made non-wetting by the use of a powder which coats
them. Because of the absence of a contact line, quick motions without leakage of small
amounts of liquid are allowed, which can be of interest in microfluidic applications. After
characterizing the static liquid marble, we focus on its properties and study
experimentally the viscous motion of liquid marbles. Then, we describe qualitatively
possible ways for putting marbles into motion and quantify the robustness of this object.
Keywords: particles at interfaces; non-wetting; interfacial hydrodynamics
Liquid marbles are drops coated with a hydrophobic powder (Aussillous et al. 2001).
Such globules are observed to be in a non-wetting situation, and thus behave as