title: Hydrodynamic interaction between a spherical particle and an elastic surface: a gentle probe for soft thin Films.
abstract: We study the hydrodynamic interaction between a sphere and an elastic surface at a nanoscale with a dynamic surface force apparatus. We show that the interplay between viscous forces and elastic deformations leads to very rich scaling properties of the force response, providing a unique signature of the surface elastic behavior. These properties are illustrated on three different examples: a thick elastomer, a thin elastomer film, and a layer of micrometric bubbles. We show that this fluid probing allows one to measure the Young's modulus of surfaces and soft thin layers at distance, without any direct solid-solid contact.
authors.affiliation: Université Lyon 1-Université de Lyon-CNRS, Laboratoire PMCN, F-69622 Villeurbanne, France.
authors.forename: Samuel
authors.initials: S
authors.lastname: Leroy
authors.forename: Audrey
authors.initials: A
authors.lastname: Steinberger
authors.forename: Cécile
authors.initials: C
authors.lastname: Cottin-Bizonne
authors.forename: Frédéric
authors.initials: F
authors.lastname: Restagno
authors.forename: Liliane
authors.initials: L
authors.lastname: Léger
authors.forename: Élisabeth
authors.initials: É
authors.lastname: Charlaix