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dc.contributor.authorHonciuc, Andrei-
dc.contributor.authorHoward, Alexander L.-
dc.contributor.authorSchwartz, Daniel K.-
dc.date.accessioned2018-12-11T15:44:50Z-
dc.date.available2018-12-11T15:44:50Z-
dc.date.issued2008-
dc.identifier.issn1932-7447de_CH
dc.identifier.issn1932-7455de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/13742-
dc.description.abstractTotal internal reflection fluorescence microscopy was used to obtain real-time images of individual fluorescently labeled hexadecanoic acid molecules as they absorbed at the aqueous-fused silica interface. In contrast with laterally averaged ensemble measurements of surface coverage versus time, single-molecule observations provide direct, model-independent measurements of adsorption kinetics. Additionally, since the observations were made under steady-state conditions at extremely low coverage, effects due to transport kinetics did not influence the results, permitting accurate measurement of the fundamental attachment rate as a function of temperature, that is, the rate at which molecules are transferred to the surface from the subsurface layer. We found that the attachment rate systematically increased with increasing temperature; an Arrhenius analysis gave an activation energy of Ea = 19 ± 2 kJ/mol. We hypothesize that this energy, which is similar in magnitude to the strength of an OH···O hydrogen bond, is associated with the displacement of a water molecule from the silica surface.de_CH
dc.language.isoende_CH
dc.publisherAmerican Chemical Societyde_CH
dc.relation.ispartofThe Journal of Physical Chemistry Cde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subject.ddc540: Chemiede_CH
dc.titleSingle molecule observations of fatty acid adsorption at the silica/water interface : activation energy of attachmentde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementLife Sciences und Facility Managementde_CH
zhaw.organisationalunitInstitut für Chemie und Biotechnologie (ICBT)de_CH
dc.identifier.doi10.1021/jp8051856de_CH
zhaw.funding.euNode_CH
zhaw.issue6de_CH
zhaw.originated.zhawNode_CH
zhaw.pages.end2081de_CH
zhaw.pages.start2078de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume113de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
Appears in collections:Publikationen Life Sciences und Facility Management

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