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dc.contributor.authorZarbakhsh, Aen_US
dc.contributor.authorCampana, Men_US
dc.contributor.authorWebster, JRPen_US
dc.date.accessioned2015-01-21T13:09:53Z
dc.date.issued2014-08-11en_US
dc.identifier.otherla502559r
dc.identifier.otherla502559r
dc.identifier.otherla502559r
dc.identifier.otherla502559ren_US
dc.identifier.otherla502559ren_US
dc.identifier.urihttp://qmro.qmul.ac.uk/xmlui/handle/123456789/6370
dc.description.abstractThe conformation of charged surfactants at the oil-water interface was recently reported. With the aim to assess the role of the head group size on the conformation of the adsorbed layer, we have extended these studies to a series of non-ionic dodecanol ethoxylate surfactants (C12En, ethylene oxide units n from 6 to 12). The study was performed using neutron reflectometry to enable maximum sensitivity to buried interfaces. Similarly to charged surfactants, the interface was found to be broader and rougher compared to the air-water interface. Irrespectively of the head group size, the tail group region was found to assume a staggered conformation. The conformations of the head group were found to be significantly different compared to the air-water interface, moving from a globular to an almost fully extended conformation at the oil-water interface. The stretching of the head groups is attributed to the presence of some hexadecane oil molecules, which may penetrate all the way to this region. It is proposed here that the presence of the oil, which can efficiently solvate the surfactant tail groups, plays a key role in the conformation of the adsorbed layer and is responsible for the broadening of the interface.en_US
dc.format.extent10241 - 10247 (7)en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.publisherACSen_US
dc.relation.ispartofLangmuir: the ACS journal of surfaces and colloidsen_US
dc.subjectOil-Wateren_US
dc.subjectSurfactantsen_US
dc.titleStructural Studies of Nonionic Dodecanol Ethoxylates at the Oil–Water Interface: Effect of Increasing Head Group Sizeen_US
dc.typeArticle
dc.identifier.doi10.1021/la502559ren_US
pubs.author-urlhttp://www.sbcs.qmul.ac.uk/staff/alizarbakhsh.htmlen_US
pubs.edition30en_US
pubs.notesNot knownen_US
pubs.publication-statusPublisheden_US
pubs.publisher-urlhttp://pubs.acs.org/journal/langd5en_US
pubs.volume34en_US


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