title: Effect of surface pattern on the adhesive friction of elastomers.
abstract: We present experimental results for the friction of a flat surface against a hexagonally patterned surface, both being made of PolyDiMethylSiloxane. We simultaneously measure forces of range 10 mN and observe the contact under sliding velocities of about 100 μm/s. We observe adhesive friction on three different pattern heights (80, 310, and 2100 nm). Two kinds of contacts have been observed: the flat surface is in close contact with the patterned one (called intimate contact, observed for 80 nm) or only suspended on the tops on the asperities (called laid contact, observed for 2100 nm). In the range of velocities used, the contact during friction is similar to the static one. Furthermore, our experimental system presents a contact transition during friction for h=310 nm.
authors.affiliation: Laboratoire Physico-Chimie Curie, CNRS UMR 168, Institut Curie Section Recherche, Paris, France.
authors.forename: Fanny
authors.initials: F
authors.lastname: Wu-Bavouzet
authors.forename: Juliette
authors.initials: J
authors.lastname: Cayer-Barrioz
authors.forename: Alain
authors.initials: A
authors.lastname: Le Bot
authors.forename: Françoise
authors.initials: F
authors.lastname: Brochard-Wyart
authors.forename: Axel
authors.initials: A
authors.lastname: Buguin
mesh_terms: D000269:Adhesives / Q000737:chemistry*; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D020724:Elastomers / Q000737:chemistry*; D017276:Friction; D013499:Surface Properties
chemical_list: D000269:Adhesives; D004129:Dimethylpolysiloxanes; D020724:Elastomers; C013830:baysilon