title: Long-range attractive force between hydrophobic surfaces observed by atomic force microscopy.
abstract: There is evidence from atomic force microscopy for a long-range attractive force between hydrophobic surfaces that is virtually identical to that observed with the surface forces apparatus. This force is present in the nonaqueous solvent ethylene glycol. A possible molecular mechanism involves in-plane polarized domains of solid-like monolayers adsorbed on mica, and a theoretical model has been developed that accounts for many of the observations.
authors.affiliation: Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis 55455.
authors.forename: Y H
authors.initials: YH
authors.lastname: Tsao
authors.forename: D F
authors.initials: DF
authors.lastname: Evans
authors.forename: H
authors.initials: H
authors.lastname: Wennerström
mesh_terms: D019855:Ethylene Glycol; D005026:Ethylene Glycols / Q000737:chemistry; D008433:Mathematics; D008853:Microscopy; D008956:Models, Chemical; D011095:Polyethylenes / Q000737:chemistry; D011138:Polytetrafluoroethylene / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D005026:Ethylene Glycols; D011095:Polyethylenes; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; D011138:Polytetrafluoroethylene; D019855:Ethylene Glycol