title: A new tribological experimental setup to study confined and sheared monolayers.
abstract: We have developed an original experimental setup, coupling tribology, and velocimetry experiments together with a direct visualization of the contact. The significant interest of the setup is to measure simultaneously the apparent friction coefficient and the velocity of confined layers down to molecular scale. The major challenge of this experimental coupling is to catch information on a nanometer-thick sheared zone confined between a rigid spherical indenter of millimetric radius sliding on a flat surface at constant speed. In order to demonstrate the accuracy of this setup to investigate nanometer-scale sliding layers, we studied a model lipid monolayer deposited on glass slides. It shows that our experimental setup will, therefore, help to highlight the hydrodynamic of such sheared confined layers in lubrication, biolubrication, or friction on solid polymer.
authors.affiliation: UPR22/CNRS, Institut Charles Sadron, Université de Strasbourg, 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France.
authors.forename: L
authors.initials: L
authors.lastname: Fu
authors.affiliation: UPR22/CNRS, Institut Charles Sadron, Université de Strasbourg, 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France.
authors.forename: D
authors.initials: D
authors.lastname: Favier
authors.affiliation: UPR22/CNRS, Institut Charles Sadron, Université de Strasbourg, 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France.
authors.forename: T
authors.initials: T
authors.lastname: Charitat
authors.affiliation: UPR22/CNRS, Institut Charles Sadron, Université de Strasbourg, 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France.
authors.forename: C
authors.initials: C
authors.lastname: Gauthier
authors.affiliation: UPR22/CNRS, Institut Charles Sadron, Université de Strasbourg, 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France.
authors.forename: A
authors.initials: A
authors.lastname: Rubin
mesh_terms: D004058:Diffusion; D017276:Friction; D005898:Glass; D009038:Motion; D010743:Phospholipids / Q000737:chemistry; D011108:Polymers; D011312:Pressure; D033081:Shear Strength; D013499:Surface Properties
chemical_list: D010743:Phospholipids; D011108:Polymers