Cargando…

Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures

We present the results of a Raman study of optical phonons in CuS nanocrystals (NCs) with a low areal density fabricated through the Langmuir–Blodgett technology on nanopatterned Au nanocluster arrays using a combination of surface- and interference-enhanced Raman scattering (SERS and IERS, respecti...

Descripción completa

Detalles Bibliográficos
Autores principales: Milekhin, Alexander G, Yeryukov, Nikolay A, Sveshnikova, Larisa L, Duda, Tatyana A, Rodyakina, Ekaterina E, Gridchin, Victor A, Sheremet, Evgeniya S, Zahn, Dietrich R T
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4419689/
https://www.ncbi.nlm.nih.gov/pubmed/25977845
http://dx.doi.org/10.3762/bjnano.6.77
_version_ 1782369629522362368
author Milekhin, Alexander G
Yeryukov, Nikolay A
Sveshnikova, Larisa L
Duda, Tatyana A
Rodyakina, Ekaterina E
Gridchin, Victor A
Sheremet, Evgeniya S
Zahn, Dietrich R T
author_facet Milekhin, Alexander G
Yeryukov, Nikolay A
Sveshnikova, Larisa L
Duda, Tatyana A
Rodyakina, Ekaterina E
Gridchin, Victor A
Sheremet, Evgeniya S
Zahn, Dietrich R T
author_sort Milekhin, Alexander G
collection PubMed
description We present the results of a Raman study of optical phonons in CuS nanocrystals (NCs) with a low areal density fabricated through the Langmuir–Blodgett technology on nanopatterned Au nanocluster arrays using a combination of surface- and interference-enhanced Raman scattering (SERS and IERS, respectively). Micro-Raman spectra of one monolayer of CuS NCs deposited on a bare Si substrate reveal only features corresponding to crystalline Si. However, a new relatively strong peak occurs in the Raman spectrum of CuS NCs on Au nanocluster arrays at 474 cm(−1). This feature is related to the optical phonon mode in CuS NCs and manifests the SERS effect. For CuS NCs deposited on a SiO(2) layer this phonon mode is also observed due to the IERS effect. Its intensity changes periodically with increasing SiO(2) layer thickness for different laser excitation lines and is enhanced by a factor of about 30. CuS NCs formed on Au nanocluster arrays fabricated on IERS substrates combine the advantages of SERS and IERS and demonstrate stronger SERS enhancement allowing for the observation of Raman signals from CuS NCs with an ultra-low areal density.
format Online
Article
Text
id pubmed-4419689
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Beilstein-Institut
record_format MEDLINE/PubMed
spelling pubmed-44196892015-05-14 Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures Milekhin, Alexander G Yeryukov, Nikolay A Sveshnikova, Larisa L Duda, Tatyana A Rodyakina, Ekaterina E Gridchin, Victor A Sheremet, Evgeniya S Zahn, Dietrich R T Beilstein J Nanotechnol Full Research Paper We present the results of a Raman study of optical phonons in CuS nanocrystals (NCs) with a low areal density fabricated through the Langmuir–Blodgett technology on nanopatterned Au nanocluster arrays using a combination of surface- and interference-enhanced Raman scattering (SERS and IERS, respectively). Micro-Raman spectra of one monolayer of CuS NCs deposited on a bare Si substrate reveal only features corresponding to crystalline Si. However, a new relatively strong peak occurs in the Raman spectrum of CuS NCs on Au nanocluster arrays at 474 cm(−1). This feature is related to the optical phonon mode in CuS NCs and manifests the SERS effect. For CuS NCs deposited on a SiO(2) layer this phonon mode is also observed due to the IERS effect. Its intensity changes periodically with increasing SiO(2) layer thickness for different laser excitation lines and is enhanced by a factor of about 30. CuS NCs formed on Au nanocluster arrays fabricated on IERS substrates combine the advantages of SERS and IERS and demonstrate stronger SERS enhancement allowing for the observation of Raman signals from CuS NCs with an ultra-low areal density. Beilstein-Institut 2015-03-17 /pmc/articles/PMC4419689/ /pubmed/25977845 http://dx.doi.org/10.3762/bjnano.6.77 Text en Copyright © 2015, Milekhin et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Milekhin, Alexander G
Yeryukov, Nikolay A
Sveshnikova, Larisa L
Duda, Tatyana A
Rodyakina, Ekaterina E
Gridchin, Victor A
Sheremet, Evgeniya S
Zahn, Dietrich R T
Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures
title Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures
title_full Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures
title_fullStr Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures
title_full_unstemmed Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures
title_short Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures
title_sort combination of surface- and interference-enhanced raman scattering by cus nanocrystals on nanopatterned au structures
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4419689/
https://www.ncbi.nlm.nih.gov/pubmed/25977845
http://dx.doi.org/10.3762/bjnano.6.77
work_keys_str_mv AT milekhinalexanderg combinationofsurfaceandinterferenceenhancedramanscatteringbycusnanocrystalsonnanopatternedaustructures
AT yeryukovnikolaya combinationofsurfaceandinterferenceenhancedramanscatteringbycusnanocrystalsonnanopatternedaustructures
AT sveshnikovalarisal combinationofsurfaceandinterferenceenhancedramanscatteringbycusnanocrystalsonnanopatternedaustructures
AT dudatatyanaa combinationofsurfaceandinterferenceenhancedramanscatteringbycusnanocrystalsonnanopatternedaustructures
AT rodyakinaekaterinae combinationofsurfaceandinterferenceenhancedramanscatteringbycusnanocrystalsonnanopatternedaustructures
AT gridchinvictora combinationofsurfaceandinterferenceenhancedramanscatteringbycusnanocrystalsonnanopatternedaustructures
AT sheremetevgeniyas combinationofsurfaceandinterferenceenhancedramanscatteringbycusnanocrystalsonnanopatternedaustructures
AT zahndietrichrt combinationofsurfaceandinterferenceenhancedramanscatteringbycusnanocrystalsonnanopatternedaustructures