Au, Ag and Au:Ag colloidal nanoparticles synthesized by pulsed laser ablation as SERS substrates
Chemically pure colloidal suspensions of gold and silver nanoparticles were synthesized using pulsed laser ablation. The dependence of laser fluence on the surface plasmon characteristics of the nanoparticles was investigated. Au:Ag colloidal suspensions were prepared by mixing highly monodisperse A...
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2014-12-01
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Series: | Progress in Natural Science: Materials International |
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Online Access: | http://www.sciencedirect.com/science/article/pii/S1002007114001270 |
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doaj-65c1cca038124fc4a1cae184970c8d292020-11-24T22:49:12ZengElsevierProgress in Natural Science: Materials International1002-00712014-12-0124656957810.1016/j.pnsc.2014.10.003Au, Ag and Au:Ag colloidal nanoparticles synthesized by pulsed laser ablation as SERS substratesM. VinodK.G. GopchandranChemically pure colloidal suspensions of gold and silver nanoparticles were synthesized using pulsed laser ablation. The dependence of laser fluence on the surface plasmon characteristics of the nanoparticles was investigated. Au:Ag colloidal suspensions were prepared by mixing highly monodisperse Au and Ag nanocolloids. The plasmon band of these mixtures was found to be highly sensitive to Au:Ag concentration ratio and wavelength of the laser beam used in the ablation process. The Au:Ag mixture consists of almost spherical shaped nanostructures with a tendency to join with adjacent ones. The surface enhanced Raman scattering activity of the Au, Ag and Au:Ag colloidal suspensions was tested using crystal violet as probe molecules. Enhancement in Raman signal obtained with Au:Ag substrates was found to be promising and strongly depends on its plasmon characteristics.http://www.sciencedirect.com/science/article/pii/S1002007114001270Laser ablationAu and Ag nanoparticlesNanocolloidsPlasmonSERSCrystal violet |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. Vinod K.G. Gopchandran |
spellingShingle |
M. Vinod K.G. Gopchandran Au, Ag and Au:Ag colloidal nanoparticles synthesized by pulsed laser ablation as SERS substrates Progress in Natural Science: Materials International Laser ablation Au and Ag nanoparticles Nanocolloids Plasmon SERS Crystal violet |
author_facet |
M. Vinod K.G. Gopchandran |
author_sort |
M. Vinod |
title |
Au, Ag and Au:Ag colloidal nanoparticles synthesized by pulsed laser ablation as SERS substrates |
title_short |
Au, Ag and Au:Ag colloidal nanoparticles synthesized by pulsed laser ablation as SERS substrates |
title_full |
Au, Ag and Au:Ag colloidal nanoparticles synthesized by pulsed laser ablation as SERS substrates |
title_fullStr |
Au, Ag and Au:Ag colloidal nanoparticles synthesized by pulsed laser ablation as SERS substrates |
title_full_unstemmed |
Au, Ag and Au:Ag colloidal nanoparticles synthesized by pulsed laser ablation as SERS substrates |
title_sort |
au, ag and au:ag colloidal nanoparticles synthesized by pulsed laser ablation as sers substrates |
publisher |
Elsevier |
series |
Progress in Natural Science: Materials International |
issn |
1002-0071 |
publishDate |
2014-12-01 |
description |
Chemically pure colloidal suspensions of gold and silver nanoparticles were synthesized using pulsed laser ablation. The dependence of laser fluence on the surface plasmon characteristics of the nanoparticles was investigated. Au:Ag colloidal suspensions were prepared by mixing highly monodisperse Au and Ag nanocolloids. The plasmon band of these mixtures was found to be highly sensitive to Au:Ag concentration ratio and wavelength of the laser beam used in the ablation process. The Au:Ag mixture consists of almost spherical shaped nanostructures with a tendency to join with adjacent ones. The surface enhanced Raman scattering activity of the Au, Ag and Au:Ag colloidal suspensions was tested using crystal violet as probe molecules. Enhancement in Raman signal obtained with Au:Ag substrates was found to be promising and strongly depends on its plasmon characteristics. |
topic |
Laser ablation Au and Ag nanoparticles Nanocolloids Plasmon SERS Crystal violet |
url |
http://www.sciencedirect.com/science/article/pii/S1002007114001270 |
work_keys_str_mv |
AT mvinod auagandauagcolloidalnanoparticlessynthesizedbypulsedlaserablationasserssubstrates AT kggopchandran auagandauagcolloidalnanoparticlessynthesizedbypulsedlaserablationasserssubstrates |
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