Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138078
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dc.contributor.authorYu, Jingen_US
dc.contributor.authorJackson, N. E.en_US
dc.contributor.authorXu, X.en_US
dc.contributor.authorMorgenstern, Y.en_US
dc.contributor.authorKaufman, Y.en_US
dc.contributor.authorRuths, M.en_US
dc.contributor.authorde Pablo, J.en_US
dc.contributor.authorTirrell, M.en_US
dc.date.accessioned2020-04-23T06:44:06Z-
dc.date.available2020-04-23T06:44:06Z-
dc.date.issued2018-
dc.identifier.citationYu, J., Jackson, N. E., Xu, X., Morgenstern, Y., Kaufman, Y., Ruths, M., . . . Tirrell, M. (2018). Multivalent counterions diminish the lubricity of polyelectrolyte brushes. Science, 360(6396), 1434-1438. doi:10.1126/science.aar5877en_US
dc.identifier.issn0036-8075en_US
dc.identifier.urihttps://hdl.handle.net/10356/138078-
dc.description.abstractPolyelectrolyte brushes provide wear protection and lubrication in many technical, medical, physiological, and biological applications. Wear resistance and low friction are attributed to counterion osmotic pressure and the hydration layer surrounding the charged polymer segments. However, the presence of multivalent counterions in solution can strongly affect the interchain interactions and structural properties of brush layers. We evaluated the lubrication properties of polystyrene sulfonate brush layers sliding against each other in aqueous solutions containing increasing concentrations of counterions. The presence of multivalent ions (Y3+, Ca2+, Ba2+), even at minute concentrations, markedly increases the friction forces between brush layers owing to electrostatic bridging and brush collapse. Our results suggest that the lubricating properties of polyelectrolyte brushes in multivalent solution are hindered relative to those in monovalent solution.en_US
dc.language.isoenen_US
dc.relation.ispartofScienceen_US
dc.rights© 2018 The Authors. Some rights reserved. This paper was published by American Association for the Advancement of Science in Science and is made available with permission of The Authors.en_US
dc.subjectEngineering::Materialsen_US
dc.titleMultivalent counterions diminish the lubricity of polyelectrolyte brushesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science & Engineeringen_US
dc.identifier.doi10.1126/science.aar5877-
dc.description.versionAccepted versionen_US
dc.identifier.pmid29954973-
dc.identifier.scopus2-s2.0-85049149820-
dc.identifier.issue6396en_US
dc.identifier.volume360en_US
dc.identifier.spage1434en_US
dc.identifier.epage1438en_US
dc.subject.keywordsPolymer Brushesen_US
dc.subject.keywordsLubricationen_US
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item.grantfulltextopen-
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