title: Polymer bridging probed by magnetic colloids.
abstract: Superparamagnetic particles offer a new way to probe the kinetics of adhesive processes. Two different scenarios of physical adhesion are studied. The thermal activation of van der Waals adhesion is well described by an Arrhenius model. In contrast, it is necessary to go beyond the Arrhenius description to understand the thermal activation of bridging between colloidal particles by a polymer at equilibrium adsorbance. We show that polymer bridging requires some removal of adsorbed polymer and is strongly influenced by the proximity of a glass transition within the adsorbed polymer.
authors.affiliation: LCMD, ESPCI, CNRS UMR 7612, 10 rue Vauquelin, 75231 Paris CEDEX 05, France.
authors.forename: Laetitia
authors.initials: L
authors.lastname: Cohen-Tannoudji
authors.forename: Emanuel
authors.initials: E
authors.lastname: Bertrand
authors.forename: Lydie
authors.initials: L
authors.lastname: Bressy
authors.forename: Cécile
authors.initials: C
authors.lastname: Goubault
authors.forename: Jean
authors.initials: J
authors.lastname: Baudry
authors.forename: Jacob
authors.initials: J
authors.lastname: Klein
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Joanny
authors.forename: Jérôme
authors.initials: J
authors.lastname: Bibette
mesh_terms: D000268:Adhesiveness; D000327:Adsorption; D001665:Binding Sites; D003102:Colloids / Q000032:analysis* / Q000737:chemistry*; D008280:Magnetics; D015336:Molecular Probe Techniques; D011108:Polymers / Q000032:analysis* / Q000737:chemistry*
chemical_list: D003102:Colloids; D011108:Polymers