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dc.creatorMedina, S.es
dc.creatorBenítez, J. J.es
dc.creatorCastro Arroyo, Miguel Ángeles
dc.creatorCerrillos, C.es
dc.creatorMillán, C.es
dc.creatorAlba, María D.es
dc.date.accessioned2022-06-22T16:20:21Z
dc.date.available2022-06-22T16:20:21Z
dc.date.issued2013
dc.identifier.citationMedina, S., Benítez, J.J., Castro Arroyo, M.Á., Cerrillos, C., Millán, C. y Alba, M.D. (2013). Monolayer arrangement of fatty hydroxystearic acids on graphite: Influence of hydroxyl groups. Thin Solid Films, 539, 194-200.
dc.identifier.issn0040-6090es
dc.identifier.urihttps://hdl.handle.net/11441/134613
dc.description.abstractPrevious studies have indicated that long-chain linear carboxylic acids form commensurate packed crystalline monolayers on graphite even at temperatures above their melting point. This study examines the effect on the monolayer formation and structure of adding one or more secondary hydroxyl, functional groups to the stearic acid skeleton (namely, 12-hydroxystearic and 9,10-dihydroxystearic acid). Moreover, a comparative study of the monolayer formation on recompressed and monocrystalline graphite has been performed through X-ray diffraction (XRD) and Scanning Tunneling Microscopy (STM), respectively. The Differential Scanning Calorimetry (DSC) and XRD data were used to confirm the formation of solid monolayers and XRD data have provided a detailed structural analysis of the monolayers in good correspondence with obtained STM images. DSC and XRD have demonstrated that, in stearic acid and 12-hydroxystearic acid adsorbed onto graphite, the monolayer melted at a higher temperature than the bulk form of the carboxylic acid. However, no difference was observed between the melting point of the monolayer and the bulk form for 9,10-dihydroxystearic acid adsorbed onto graphite. STM results indicated that all acids on the surface have a rectangular p2 monolayer structure, whose lattice parameters were uniaxially commensurate on the a-axis. This structure does not correlate with the initial structure of the pure compounds after dissolving, but it is conditioned to favor a) hydrogen bond formation between the carboxylic groups and b) formation of hydrogen bonds between secondary hydroxyl groups, if spatially permissible. Therefore, the presence of hydroxyl functional groups affects the secondary structure and behavior of stearic acid in the monolayer.es
dc.description.sponsorshipDirección General de Investigación Científica y Técnica CTQ 2010-14874, CTQ 2011-24299es
dc.formatapplication/pdfes
dc.format.extent27 p.es
dc.language.isoenges
dc.publisherElsevieres
dc.relation.ispartofThin Solid Films, 539, 194-200.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectCarboxylic acides
dc.subjectDSCes
dc.subjectGraphitees
dc.subjectMonolayeres
dc.subjectSolid-liquid interfacees
dc.subjectSTMes
dc.subjectVT-XRDes
dc.titleMonolayer arrangement of fatty hydroxystearic acids on graphite: Influence of hydroxyl groupses
dc.typeinfo:eu-repo/semantics/articlees
dcterms.identifierhttps://ror.org/03yxnpp24
dc.type.versioninfo:eu-repo/semantics/acceptedVersiones
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Química Inorgánicaes
dc.relation.projectIDCTQ 2010-14874es
dc.relation.projectIDCTQ 2011-24299es
dc.relation.publisherversionhttps://doi.org/10.1016/j.tsf.2013.05.053es
dc.identifier.doi10.1016/j.tsf.2013.05.053es
dc.journaltitleThin Solid Filmses
dc.publication.volumen539es
dc.publication.initialPage194es
dc.publication.endPage200es
dc.contributor.funderDirección General de Investigación Científica y Técnica (DGICYT). Españaes

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