Size-Dependent and Step-Modulated Supramolecular Electrochemical Properties of Catechol-Derived Adlayers at Pt(hkl) Surfaces

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dc.contributorElectroquímica de Superficieses
dc.contributorGrupo de Espectroelectroquímica y Modelización (GEM)es
dc.contributorElectroquímica Aplicada y Electrocatálisises
dc.contributor.authorRodríguez López, Margarita-
dc.contributor.authorHerrero, Enrique-
dc.contributor.authorCliment, Victor-
dc.contributor.authorRodes García, Antonio-
dc.contributor.authorAldaz Riera, Antonio-
dc.contributor.authorFeliu, Juan M.-
dc.contributor.authorCarrasquillo, Arnaldo Jr.-
dc.contributor.otherUniversidad de Alicante. Departamento de Química Físicaes
dc.contributor.otherUniversidad de Alicante. Instituto Universitario de Electroquímicaes
dc.identifier.citationLangmuir. 2013, 29(42): 13102-13110. doi:10.1021/la402627ees
dc.identifier.issn0743-7463 (Print)-
dc.identifier.issn1520-5827 (Online)-
dc.description.abstractThe electrochemical reactivity of catechol-derived adlayers is reported at platinum (Pt) single-crystal electrodes. Pt(111) and stepped vicinal surfaces are used as model surfaces possessing well-ordered nanometer-sized Pt(111) terraces ranging from 0.4 to 12 nm. The electrochemical experiments were designed to probe how the control of monatomic step-density and of atomic-level step structure can be used to modulate molecule–molecule interactions during self-assembly of aromatic-derived organic monolayers at metallic single-crystal electrode surfaces. A hard sphere model of surfaces and a simplified band formation model are used as a theoretical framework for interpretation of experimental results. The experimental results reveal (i) that supramolecular electrochemical effects may be confined, propagated, or modulated by the choice of atomic level crystallographic features (i.e.monatomic steps), deliberately introduced at metallic substrate surfaces, suggesting (ii) that substrate-defect engineering may be used to tune the macroscopic electronic properties of aromatic molecular adlayers and of smaller molecular
dc.description.sponsorshipACJ and MRL thank support from PCUPR, UPRM, and the Institute of Electrochemistry at University of Alicante through project MICINN (Spain) CTQ2010-16271 and Generalitat Valenciana (project PROMETEO/2009/045, Feder).es
dc.publisherAmerican Chemical Societyes
dc.rights© 2013 American Chemical Societyes
dc.subjectCatechol-derived adlayerses
dc.subjectPlatinum single crystal electrodeses
dc.subjectElectrochemical propertieses
dc.subject.otherQuímica Físicaes
dc.titleSize-Dependent and Step-Modulated Supramolecular Electrochemical Properties of Catechol-Derived Adlayers at Pt(hkl) Surfaceses
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