Surface-enhanced Raman effect in hybrid metal–semiconductor nanoparticle assemblies View Full Text


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Article Info

DATE

2013-05

AUTHORS

Vanni Lughi, Alois Bonifacio, Matteo Barbone, Lucia Marsich, Valter Sergo

ABSTRACT

Hybrid metal–semiconductor nanoparticles consisting of silver nanoparticle cores (AgNPs) coated with a layer of CdSe quantum dots (QDs) have been studied by Raman spectroscopy. The hybrid nanoparticles were prepared via electrostatic interaction by mixing aqueous suspensions of QDs and AgNPs, where opposite charges on the AgNPs and QDs surfaces were induced by opportunely selected capping agents. Assemblies of such hybrid nanoparticles show an increased intensity of the Raman spectrum of up to 500 times, when compared to that of the sole QDs. This enhancement is attributed to the SERS effect (Surface-enhanced Raman scattering). Such enhancement of the Raman modes suggests several opportunities for further research, both in imaging and sensing applications. More... »

PAGES

1663

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11051-013-1663-9

DOI

http://dx.doi.org/10.1007/s11051-013-1663-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1008164558


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