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dc.contributor.authorBurelbach, Jeromeen
dc.contributor.authorZupkauskas, Mykolasen
dc.contributor.authorLamboll, Robinen
dc.contributor.authorLan, Yangen
dc.contributor.authorEiser, Erikaen
dc.date.accessioned2017-12-19T16:34:01Z
dc.date.available2017-12-19T16:34:01Z
dc.date.issued2017-09-07en
dc.identifier.issn0021-9606
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/270272
dc.description.abstractWe present thermophoretic measurements in aqueous suspensions of three different polystyrene (PS) particles of varying negative charge, size, and surface coating. Our measurement technique is based on the observation of the colloidal steady-state distribution using conventional bright-field microscopy, which avoids undesirable effects such as laser-induced convection or local heating. We find that the colloids with the weakest zeta potential exhibit the strongest thermophoretic effect, suggesting that the Soret coefficient has a more intricate dependence on surface functionality than predicted by existing theoretical approaches. We also study the relaxation of the colloids to steady-state and propose a model to quantify the relaxation speed, based on the time evolution of the colloidal center of mass. Our observations are well described by this model and show that the relaxation speed tends to increase with the magnitude of the thermophoretic force.
dc.description.sponsorshipThis work was funded by the Winton Programme for the Physics of Sustainability, Unilever Case and EPSRC (Grant No. 1353070).
dc.languageengen
dc.publisherAIP Publishing
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleColloidal motion under the action of a thermophoretic forceen
dc.typeArticle
prism.issueIdentifier9en
prism.number094906en
prism.publicationDate2017en
prism.publicationNameThe Journal of Chemical Physicsen
prism.volume147en
dc.identifier.doi10.17863/CAM.17122
dcterms.dateAccepted2017-08-19en
rioxxterms.versionofrecord10.1063/1.5001023en
rioxxterms.versionVoR*
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/en
rioxxterms.licenseref.startdate2017-09-07en
dc.contributor.orcidLamboll, Robin [0000-0002-8410-037X]
dc.contributor.orcidEiser, Erika [0000-0003-2881-8157]
dc.identifier.eissn1089-7690
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (1353070)
cam.issuedOnline2017-09-01en
cam.orpheus.successThu Jan 30 13:04:25 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International