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Forces between Hydrophobic Solids in Concentrated Aqueous Salt Solution

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dc.contributorVirginia Techen
dc.contributor.authorMastropietro, Dean J.en
dc.contributor.authorDucker, William A.en
dc.contributor.departmentChemical Engineeringen
dc.date.accessed2013-12-10en
dc.date.accessioned2013-12-10T17:31:19Zen
dc.date.available2013-12-10T17:31:19Zen
dc.date.issued2012-03-05en
dc.description.abstractMuch research has focused on the discovery and description of long-ranged forces between hydrophobic solids immersed in water. Here we show that the force between high contact-angle solids in concentrated salt solution (1 M KCl) agrees very well with van der Waals forces calculated from Lifshitz theory for separations greater than 5 nm. The hydrophobic solids are octadecyltrichlorosilane-coated glass, with an advancing contact angle of 108 degrees. Thus, in 1 M salt solution, it is unnecessary to invoke the presence of a hydrophobic force at separations greater than 5 nm. Through measurement in salt solution, we avoid the necessity of accounting for large electrostatic forces that frequently occur in pure water and may obscure resolution of other forces.en
dc.description.sponsorshipVirginia Techen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMastropietro, Dean J. ; Ducker, William A., Mar 5, 2012. “Forces between Hydrophobic Solids in Concentrated Aqueous Salt Solution,” PHYSICAL REVIEW LETTERS 108(10): 106101. DOI: 10.1103/PhysRevLett.108.106101en
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.108.106101en
dc.identifier.issn0031-9007en
dc.identifier.urihttp://hdl.handle.net/10919/24504en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevLett.108.106101en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectSurfactant-coated surfacesen
dc.subjectMonte carlo simulationen
dc.subjectLong-rangeen
dc.subjectBoundary-conditionen
dc.subjectThin filmsen
dc.subjectAttractionen
dc.subjectWateren
dc.subjectMicroscopyen
dc.subjectParticlesen
dc.subjectInterfacesen
dc.subjectPhysicsen
dc.titleForces between Hydrophobic Solids in Concentrated Aqueous Salt Solutionen
dc.title.serialPhysical Review Lettersen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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