A new route to produce efficient surface-enhanced Raman spectroscopy substrates: Gold-decorated CdSe nanowires
Type
ArticleAuthors
Das, Gobind
Chakraborty, Ritun
Gopalakrishnan, Anisha
Baranov, Dmitry
Di Fabrizio, Enzo M.

Krahne, Roman
KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionMaterial Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2013-04-13Online Publication Date
2013-04-13Print Publication Date
2013-05Permanent link to this record
http://hdl.handle.net/10754/562721
Metadata
Show full item recordAbstract
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.Citation
Das, G., Chakraborty, R., Gopalakrishnan, A., Baranov, D., Di Fabrizio, E., & Krahne, R. (2013). A new route to produce efficient surface-enhanced Raman spectroscopy substrates: gold-decorated CdSe nanowires. Journal of Nanoparticle Research, 15(5). doi:10.1007/s11051-013-1596-3Publisher
Springer NatureJournal
Journal of Nanoparticle Researchae974a485f413a2113503eed53cd6c53
10.1007/s11051-013-1596-3