Effect of Au and Au@Ag core-shell nanoparticles on the SERS of bridging organic molecules

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dc.contributor.authorGuzel, Remziye
dc.contributor.authorUstundag, Zafer
dc.contributor.authorEksi, Haslet
dc.contributor.authorKeskin, Selda
dc.contributor.authorTaner, Bilge
dc.contributor.authorDurgun, Zeynep Gulsah
dc.contributor.authorTuran, Aybuke A. Isbir
dc.date.accessioned2024-04-24T16:15:01Z
dc.date.available2024-04-24T16:15:01Z
dc.date.issued2010
dc.departmentDicle Üniversitesien_US
dc.description.abstractGold nanoparticles (AuNPs) with about 6 nm size were produced and stabilized with mercaptopropionic acid (MPA) film to produce a monolayer protected cluster (MPC) of AuS(CH2)(2)COOH. 4-Aminothiophenol (ATP) molecules were introduced to the activated carboxylic acid ends of the film surrounding the AuNPs to produce AuS(CH2)(2)CONHPhSH MPC. These modified AuNPs were again self-assembled with Au@Ag core-shell bimetallic nanoparticles via the -SH groups to produce an organic bridge between Au and Au@Ag metallic nanoparticles. An unusually strong enhancement of the Raman signals was observed and assigned to the plasmon coupling between the AuNPs and Au@Ag NPs bridged assembly. Formation of AuS(CH2)(2)COOH and AuS(CH2)(2)CONHPhSH clusters and AuS(CH2)(2)CONHPhS(Au@Ag) assembly is confirmed by UV-Vis, reflection-absorption IR spectroscopy (RAIRS) and X-ray photoelectron spectroscopy (XPS), as well as by TEM analysis. The SERS activity of the AuNPs and Au@Ag NPs was tested using the HS(CH2)(2)CONHPhSH molecule as a probe to compare the effectiveness of monometallic and bimetallic systems. SERS spectra show that Au@Ag bimetallic nanoparticles are very effective SERS-active substrates. (C) 2010 Elsevier Inc. All rights reserved.en_US
dc.description.sponsorshipAnkara University [09B4240012]; TUBITAK [109T633]en_US
dc.description.sponsorshipThis work was supported by Ankara University as a BAP Project with a Grant number 09B4240012, and TUBITAK project with a number of 109T633. We thank Dr. Ayten Celik Aktas for obtaining TEM images. We thank Dr. Ugur Tamer and Erhan Temur for obtaining SERS spectra of the MPCs.en_US
dc.identifier.doi10.1016/j.jcis.2010.07.039
dc.identifier.endpage42en_US
dc.identifier.issn0021-9797
dc.identifier.issn1095-7103
dc.identifier.issue1en_US
dc.identifier.pmid20701922
dc.identifier.scopus2-s2.0-77956230632
dc.identifier.scopusqualityQ1
dc.identifier.startpage35en_US
dc.identifier.urihttps://doi.org/10.1016/j.jcis.2010.07.039
dc.identifier.urihttps://hdl.handle.net/11468/15594
dc.identifier.volume351en_US
dc.identifier.wosWOS:000282252700005
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoenen_US
dc.publisherAcademic Press Inc Elsevier Scienceen_US
dc.relation.ispartofJournal of Colloid and Interface Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBimetallic Nanoparticlesen_US
dc.subjectClustersen_US
dc.subjectSurface-Enhanced Raman Spectroscopyen_US
dc.subjectTransmission Electron Microscopyen_US
dc.subjectX-Ray Photoelectron Spectroscopyen_US
dc.titleEffect of Au and Au@Ag core-shell nanoparticles on the SERS of bridging organic moleculesen_US
dc.titleEffect of Au and Au@Ag core-shell nanoparticles on the SERS of bridging organic molecules
dc.typeArticleen_US

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