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dc.contributor.authorCenteno, Silvia 
dc.contributor.authorRuano, Cristina
dc.contributor.authorRomán-Pérez, Jéssica
dc.contributor.authorLópez-Tocón, Isabel 
dc.contributor.authorOtero, Juan Carlos
dc.contributor.authorSoto, Juan
dc.date.accessioned2013-10-25T08:00:48Z
dc.date.available2013-10-25T08:00:48Z
dc.date.issued2013
dc.identifier.urihttp://hdl.handle.net/10630/6163
dc.description.abstractThough it is generally accepted that the electromagnetic mechanism related to the excitation of localized plasmons of the metal surface is the most important contribution in SERS, the chemical interaction between molecule and metal plays also a crucial role.[1] This is especially relevant in SERS electrochemical experiments where adsorbates can undergo photoinduced charge transfer processes (CT) with the metal. In some of these experiences huge energy gains (G) of up to 5 eV/V have been reported, which are in conflict with the classical picture of the metal-adsorbate CT mechanism (G=1). [2] Supported on electronic structure calculations of metal-molecule nanoclusters, we are able to elucidate that this “anomalous” gain is mainly due to two different contributions, firstly, the sensitivity of the CT electronic states of the metal-molecule system on the effective charge excess of the metal, and, secondly, to an increased electric capacitance of the metallic nanocluster with respect to the macroscopic values. We are able to semiquantitatively estimate this capacitance enhancement and explain it by assuming that the strongest SERS signal comes from those surface nanostructures where a higher charge excess is stored. Therefore, we believe that SERS can become a useful tool for capacitance measurements at nanometer scale. [1] E.C. Le Ru,; P.G. Etchegoin, Principles of Surface-Enhanced Raman Spectroscopy and related plasmonic effects. Elsevier, Amsterdam, 2009. [2] L. Cui, D-Y Wu, A. Wang, B. Ren, Z-Q Tian, J. Phys. Chem. C, 2010, 114, 16588-16595.es_ES
dc.description.sponsorshipUniversidad de Málaga. Campus de Excelencia Internacional de Andalucía Tech.es_ES
dc.language.isoenges_ES
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectEspectroscopía Ramanes_ES
dc.subject.otherSurface-enhanced Raman spectroscopyes_ES
dc.subject.otherMetallic nanoparticleses_ES
dc.subject.otherCapacitancees_ES
dc.titleUsing Surface-enhanced Raman scattering to probe the capacitance of metallic nanostructureses_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.centroFacultad de Cienciases_ES
dc.relation.eventtitleSymposium on Plasmon-based Chemistry and Physicses_ES
dc.relation.eventplaceLovaina, Bélgicaes_ES
dc.relation.eventdate19-07-13es_ES


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