A new route to produce efficient surface-enhanced Raman spectroscopy substrates: Gold-decorated CdSe nanowires

Handle URI:
http://hdl.handle.net/10754/562721
Title:
A new route to produce efficient surface-enhanced Raman spectroscopy substrates: Gold-decorated CdSe nanowires
Authors:
Das, Gobind; Chakraborty, Ritun; Gopalakrishnan, Anisha; Baranov, Dmitry; Di Fabrizio, Enzo M. ( 0000-0001-5886-4678 ) ; Krahne, Roman
Abstract:
Surface-enhanced Raman spectroscopy is a popular tool for the detection of extremely small quantities of target molecules. Au nanoparticles have been very successful in this respect due to local enhancement of the light intensity caused by their plasmon resonance. Furthermore, Au nanoparticles are biocompatible, and target substances can be easily attached to their surface. Here, we demonstrate that Au-decorated CdSe nanowires when employed as SERS substrates lead to an enhancement as large as 105 with respect to the flat Au surfaces. In the case of hybrid metal-CdSe nanowires, the Au nucleates preferably on lattice defects at the lateral facets of the nanowires, which leads to a homogeneous distribution of Au nanoparticles on the nanowire, and to an efficient quenching of the nanowire luminescence. Moreover, the size of the Au nanoparticles can be well controlled via the AuCl3 concentration in the fabrication process. We demonstrate the effectiveness of our SERS substrates with two target substances, namely, cresyl-violet and rhodamine-6G. Au-decorated nanowires can be easily fabricated in large quantities at low cost by wet-chemical synthesis. Furthermore, their deposition onto various substrates, as well as the functionalization of these wires with the target substances, is as straightforward as with the traditional markers. © 2013 Springer Science+Business Media Dordrecht.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program
Publisher:
Springer Verlag
Journal:
Journal of Nanoparticle Research
Issue Date:
13-Apr-2013
DOI:
10.1007/s11051-013-1596-3
Type:
Article
ISSN:
13880764
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorDas, Gobinden
dc.contributor.authorChakraborty, Ritunen
dc.contributor.authorGopalakrishnan, Anishaen
dc.contributor.authorBaranov, Dmitryen
dc.contributor.authorDi Fabrizio, Enzo M.en
dc.contributor.authorKrahne, Romanen
dc.date.accessioned2015-08-03T11:03:08Zen
dc.date.available2015-08-03T11:03:08Zen
dc.date.issued2013-04-13en
dc.identifier.issn13880764en
dc.identifier.doi10.1007/s11051-013-1596-3en
dc.identifier.urihttp://hdl.handle.net/10754/562721en
dc.description.abstractSurface-enhanced Raman spectroscopy is a popular tool for the detection of extremely small quantities of target molecules. Au nanoparticles have been very successful in this respect due to local enhancement of the light intensity caused by their plasmon resonance. Furthermore, Au nanoparticles are biocompatible, and target substances can be easily attached to their surface. Here, we demonstrate that Au-decorated CdSe nanowires when employed as SERS substrates lead to an enhancement as large as 105 with respect to the flat Au surfaces. In the case of hybrid metal-CdSe nanowires, the Au nucleates preferably on lattice defects at the lateral facets of the nanowires, which leads to a homogeneous distribution of Au nanoparticles on the nanowire, and to an efficient quenching of the nanowire luminescence. Moreover, the size of the Au nanoparticles can be well controlled via the AuCl3 concentration in the fabrication process. We demonstrate the effectiveness of our SERS substrates with two target substances, namely, cresyl-violet and rhodamine-6G. Au-decorated nanowires can be easily fabricated in large quantities at low cost by wet-chemical synthesis. Furthermore, their deposition onto various substrates, as well as the functionalization of these wires with the target substances, is as straightforward as with the traditional markers. © 2013 Springer Science+Business Media Dordrecht.en
dc.publisherSpringer Verlagen
dc.subjectAu-decorationen
dc.subjectCdSeen
dc.subjectNanowiresen
dc.subjectPhononsen
dc.subjectSERSen
dc.titleA new route to produce efficient surface-enhanced Raman spectroscopy substrates: Gold-decorated CdSe nanowiresen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalJournal of Nanoparticle Researchen
dc.contributor.institutionNanostructure Division, Italian Institute of Technology, Via Morego 30, 16163 Genoa, Italyen
dc.contributor.institutionUniversity of Genoa, Genoa, Italyen
dc.contributor.institutionDepartment of Chemistry and Biochemistry, University of Colorado at Boulder, UCB 215, Boulder, CO, United Statesen
dc.contributor.institutionBIONEM Lab, University of Magna Graecia, Campus Salvatore Venuta, Viale Europa 88100, Germaneto-Catanzaro, Italyen
kaust.authorDi Fabrizio, Enzo M.en
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