title: Controlling the buckling instability of drying droplets of suspensions through colloidal interactions.
abstract: The present study focuses on the drying of droplets of colloidal suspensions using the Leidenfrost effect. At the end of drying, grains show different morphologies: cups or spheres depending on the ionic strength or zeta potential of the initial suspension. High ionic strengths and low absolute zeta potential values lead to spherical morphologies. A model based on the calculations of DLVO potentials has been implemented to extract a critical pressure, which provides a quantitative criterion for buckling whatever the initial formulation is. Particularly, the buckling time is quantitatively predicted from the interparticle interactions and shows an excellent agreement with experimental values.
authors: École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris ParisTech, PSL Research University, Sciences et Ingénierie de la matière Molle, CNRS UMR7615, 10, Rue Vauquelin, F-75231 Paris Cedex 05, France. laurence.talini@espci.fr.
authors: É
authors: É
authors: Lintingre
authors: G
authors: G
authors: Ducouret
authors: F
authors: F
authors: Lequeux
authors: L
authors: L
authors: Olanier
authors: T
authors: T
authors: Périé
authors: L
authors: L
authors: Talini