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dc.contributor.authorOlivares-Amaya, Roberto
dc.contributor.authorRappoport, Dmitrij
dc.contributor.authorMunoz, Philip Alejandro
dc.contributor.authorPeng, Paul
dc.contributor.authorMazur, Eric
dc.contributor.authorAspuru-Guzik, Alan
dc.date.accessioned2014-03-10T17:38:29Z
dc.date.issued2012
dc.identifier.citationOlivares-Amaya, Roberto, Dmitrij Rappoport, Philip Alejandro Munoz, Paul Peng, Eric Mazur, and Alan Aspuru-Guzik. 2012. “Can Mixed-Metal Surfaces Provide an Additional Enhancement to SERS?” The Journal of Physical Chemistry C 116 (29) (July 26): 15568–15575. doi:10.1021/jp302597v. http://dx.doi.org/10.1021/jp302597v.en_US
dc.identifier.issn1932-7447en_US
dc.identifier.issn1932-7455en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:11878758
dc.description.abstractWe explore the chemical contribution to surface-enhanced Raman scattering (SERS) in mixed-metal substrates, both experimentally and by computer simulation. These substrates are composed of a chemically active, transition-metal overlayer deposited on an effective SERS substrate. We report improved analytical enhancement factors obtained by using a small surface coverage of palladium or platinum over nanostructured silver substrates. Theoretical predictions of the chemical contribution to the surface enhancement using density functional theory support the experimental results. In addition, these approaches show that the increased enhancement is due not only to an increase in surface coverage of the analyte but also to a higher Raman scattering cross section per molecule. The additional chemical enhancement in mixed-metal SERS substrates correlates with the binding energy of the analyte on the surface and includes both static and dynamical effects. SERS using mixed-metal substrates has the potential to improve sensing for a large group of analyte molecules and to aid the development of chemically specific SERS-based sensors.en_US
dc.description.sponsorshipChemistry and Chemical Biologyen_US
dc.description.sponsorshipEngineering and Applied Sciencesen_US
dc.description.sponsorshipPhysicsen_US
dc.language.isoen_USen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofdoi:10.1021/jp302597ven_US
dash.licenseLAA
dc.titleCan Mixed-Metal Surfaces Provide an Additional Enhancement to SERS?en_US
dc.typeJournal Articleen_US
dc.description.versionAccepted Manuscripten_US
dc.relation.journalJournal of Physical Chemistry Cen_US
dash.depositing.authorAspuru-Guzik, Alan
dash.waiver2011-11-10
dc.date.available2014-03-10T17:38:29Z
dc.identifier.doi10.1021/jp302597v*
dash.contributor.affiliatedCamayd-Munoz, Phil
dash.contributor.affiliatedOlivares-Amaya, Roberto
dash.contributor.affiliatedRappoport, Dmitrij
dash.contributor.affiliatedAspuru-Guzik, Alan
dash.contributor.affiliatedMazur, Eric


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