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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2015
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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 |
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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 |
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