title: Hofmeister effect on the interfacial dynamics of single polymer molecules.
abstract: The Hofmeister effect on interfacial dynamics has been discovered for single charged polymer molecules (sodium polystyrene sulfonate) adsorbed on a hydrophobic surface from an aqueous solution. The presence of ions in the aqueous solution affects the surface diffusivity, and its amplitudes and the surface friction follow the Hofmeister series-the kosmotropic ions slowed down the surface diffusivity and the chaotropic ions speeded it up. The amplitude of the surface friction exhibits a good correlation with the surface tension increment, indicating the interfacial feature of the Hofmeister effect.
authors.affiliation: Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Yang
authors.forename: Jiang
authors.initials: J
authors.lastname: Zhao
mesh_terms: D000327:Adsorption; D004058:Diffusion; D057927:Hydrophobic and Hydrophilic Interactions; D011137:Polystyrenes / Q000737:chemistry*; D012996:Solutions; D013499:Surface Properties; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
chemical_list: D011137:Polystyrenes; D012996:Solutions; D014867:Water; C003321:polystyrene sulfonic acid