Probing Nanoscale Thermal Transport in Surfactant Solutions

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dc.contributor.authorCao, Fangyuen
dc.contributor.authorLiu, Yingen
dc.contributor.authorXu, Jiajunen
dc.contributor.authorHe, Yadongen
dc.contributor.authorHammouda, B.en
dc.contributor.authorQiao, Ruien
dc.contributor.authorYang, Baoen
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2019-01-24T18:24:47Zen
dc.date.available2019-01-24T18:24:47Zen
dc.date.issued2015-11-04en
dc.description.abstractSurfactant solutions typically feature tunable nanoscale, internal structures. Although rarely utilized, they can be a powerful platform for probing thermal transport in nanoscale domains and across interfaces with nanometer-size radius. Here, we examine the structure and thermal transport in solution of AOT (Dioctyl sodium sulfosuccinate) in n-octane liquids using small-angle neutron scattering, thermal conductivity measurements, and molecular dynamics simulations. We report the first experimental observation of a minimum thermal conductivity occurring at the critical micelle concentration (CMC): the thermal conductivity of the surfactant solution decreases as AOT is added till the onset of micellization but increases as more AOT is added. The decrease of thermal conductivity with AOT loading in solutions in which AOT molecules are dispersed as monomers suggests that even the interfaces between individual oleophobic headgroup of AOT molecules and their surrounding non-polar octane molecules can hinder heat transfer. The increase of thermal conductivity with AOT loading after the onset of micellization indicates that the thermal transport in the core of AOT micelles and across the surfactant-oil interfaces, both of which span only a few nanometers, are efficient.en
dc.description.notesB.Y., F.C., and J.X. acknowledges the financial support from National Science Foundation (NSF) under Grant 1336778. Y.L., Y.H. and R.Q. acknowledges the financial support from National Science Foundation (NSF) under Grant 1463932. B.H. acknowledges the financial support from National Science Foundation (NSF) under Agreement No. DMR-0944772. The identification of commercial products does not imply endorsement by the National Institute of Standards and Technology nor does it imply that these are the best for the purpose.en
dc.description.sponsorshipNational Science Foundation (NSF) [1336778, 1463932, DMR-0944772]en
dc.format.extent9en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1038/srep16040en
dc.identifier.issn2045-2322en
dc.identifier.other16040en
dc.identifier.pmid26534840en
dc.identifier.urihttp://hdl.handle.net/10919/86878en
dc.identifier.volume5en
dc.language.isoen_USen
dc.publisherSpringer Natureen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectreverse micellesen
dc.subjectmolecular-dynamicsen
dc.subjectaqueous-solutionen
dc.subjectaggregationen
dc.subjectconductivityen
dc.subjectresistanceen
dc.subjectsansen
dc.subjectsimulationsen
dc.subjectinterfacesen
dc.titleProbing Nanoscale Thermal Transport in Surfactant Solutionsen
dc.title.serialScientific Reportsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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