A new route to produce efficient surface-enhanced Raman spectroscopy substrates : Gold-decorated CdSe nanowires
Das, Gobind ; Chakraborty, Ritun ; Gopalakrishnan, Anisha ; Baranov, Dmitry LU
; Di Fabrizio, Enzo
and Krahne, Roman
(2013)
In Journal of Nanoparticle Research
15(5).
- 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... (More)
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.
(Less)
- author
- Das, Gobind
; Chakraborty, Ritun
; Gopalakrishnan, Anisha
; Baranov, Dmitry
LU
; Di Fabrizio, Enzo
and Krahne, Roman
- publishing date
- 2013-05
- type
- Contribution to journal
- publication status
- published
- keywords
- Au-decoration, CdSe, Nanowires, Phonons, SERS
- in
- Journal of Nanoparticle Research
- volume
- 15
- issue
- 5
- article number
- 1596
- publisher
- Springer
- external identifiers
-
- scopus:84875954332
- ISSN
- 1388-0764
- DOI
- 10.1007/s11051-013-1596-3
- language
- English
- LU publication?
- no
- id
- a640c103-91c7-45e8-aa43-494150527ba8
- date added to LUP
- 2023-01-18 09:34:41
- date last changed
- 2023-02-14 10:36:56
@article{a640c103-91c7-45e8-aa43-494150527ba8,
abstract = {{<p>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 10<sup>5</sup> 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 AuCl<sub>3</sub> 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.</p>}},
author = {{Das, Gobind and Chakraborty, Ritun and Gopalakrishnan, Anisha and Baranov, Dmitry and Di Fabrizio, Enzo and Krahne, Roman}},
issn = {{1388-0764}},
keywords = {{Au-decoration; CdSe; Nanowires; Phonons; SERS}},
language = {{eng}},
number = {{5}},
publisher = {{Springer}},
series = {{Journal of Nanoparticle Research}},
title = {{A new route to produce efficient surface-enhanced Raman spectroscopy substrates : Gold-decorated CdSe nanowires}},
url = {{http://dx.doi.org/10.1007/s11051-013-1596-3}},
doi = {{10.1007/s11051-013-1596-3}},
volume = {{15}},
year = {{2013}},
}