Calculating average surface enhancement factors of randomly nanostructured electrodes by a combination of SERS and impedance spectroscopy

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dc.contributor.authorKozuch, Jacek
dc.contributor.authorPetrusch, N.
dc.contributor.authorGkogkou, Dimitra
dc.contributor.authorGernert, Ulrich
dc.contributor.authorWeidinger, Inez M.
dc.date.accessioned2017-10-25T06:25:11Z
dc.date.available2017-10-25T06:25:11Z
dc.date.issued2015
dc.descriptionDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.de
dc.descriptionThis publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.en
dc.description.abstractPolyhedron Ag nanostructures were created on top of a polished Au electrode via step-wise electrodeposition and tested as substrates for SERS spectroscopy. Average Raman enhancement factors were derived by combining SERS measurements with electrochemical impedance spectroscopy (EIS), which is able to determine the electroactive surface area of a randomly nanostructured surface. Depending on the deposition step an alternating increase and decrease of surface area was observed while the SERS intensity showed a clear maximum for the first deposition cycle. SEM pictures reveal the formation of Ag polyhedrons that are randomly dispersed on the Au surface. Furthermore the presence of a sub nanostructure on top of the polyhedron after the first deposition cycle is observed which becomes smoother after subsequent deposition cycles. Correlating the SEM pictures with SERS and EIS measurements it is concluded that the coral-like sub nanostructure is dominating the enhancement factor while the polyhedron structure itself only plays a minor role for electromagnetic field enhancement.en
dc.description.sponsorshipDFG, EXC 314, Unifying Concepts in Catalysisen
dc.description.sponsorshipDFG, GSC 1013, School of Analytical Sciences Adlershof (SALSA)en
dc.identifier.eissn1463-9084
dc.identifier.issn1463-9076
dc.identifier.pmid25599525
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/6943
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-6282
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.titleCalculating average surface enhancement factors of randomly nanostructured electrodes by a combination of SERS and impedance spectroscopyen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c4cp05015k
dcterms.bibliographicCitation.issue33
dcterms.bibliographicCitation.journaltitlePhysical chemistry, chemical physicsen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend21225
dcterms.bibliographicCitation.pagestart21220
dcterms.bibliographicCitation.volume17
tub.accessrights.dnbdomain
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemie::FG Physikalische Chemie / Biophysikalische Chemiede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Physikalische Chemie / Biophysikalische Chemiede
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlin

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