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MoS(2) Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy

Nanohybrids of graphene and two-dimensional (2D) layered transition metal dichalcogenides (TMD) nanostructures can provide a promising substrate for extraordinary surface-enhanced Raman spectroscopy (SERS) due to the combined electromagnetic enhancement on TMD nanostructures via localized surface pl...

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Detalles Bibliográficos
Autores principales: Ghopry, Samar Ali, Sadeghi, Seyed M., Berrie, Cindy L., Wu, Judy Z.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8699280/
https://www.ncbi.nlm.nih.gov/pubmed/34940234
http://dx.doi.org/10.3390/bios11120477
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author Ghopry, Samar Ali
Sadeghi, Seyed M.
Berrie, Cindy L.
Wu, Judy Z.
author_facet Ghopry, Samar Ali
Sadeghi, Seyed M.
Berrie, Cindy L.
Wu, Judy Z.
author_sort Ghopry, Samar Ali
collection PubMed
description Nanohybrids of graphene and two-dimensional (2D) layered transition metal dichalcogenides (TMD) nanostructures can provide a promising substrate for extraordinary surface-enhanced Raman spectroscopy (SERS) due to the combined electromagnetic enhancement on TMD nanostructures via localized surface plasmonic resonance (LSPR) and chemical enhancement on graphene. In these nanohybrid SERS substrates, the LSPR on TMD nanostructures is affected by the TMD morphology. Herein, we report the first successful growth of MoS(2) nanodonuts (N-donuts) on graphene using a vapor transport process on graphene. Using Rhodamine 6G (R6G) as a probe, SERS spectra were compared on MoS(2) N-donuts/graphene nanohybrids substrates. A remarkably high R6G SERS sensitivity up to 2 × 10(−12) M has been obtained, which can be attributed to the more robust LSPR effect than in other TMD nanostructures such as nanodiscs as suggested by the finite-difference time-domain simulation. This result demonstrates that non-metallic TMD/graphene nanohybrids substrates can have SERS sensitivity up to one order of magnitude higher than that reported on the plasmonic metal nanostructures/2D materials SERS substrates, providing a promising scheme for high-sensitivity, low-cost applications for biosensing.
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spelling pubmed-86992802021-12-24 MoS(2) Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy Ghopry, Samar Ali Sadeghi, Seyed M. Berrie, Cindy L. Wu, Judy Z. Biosensors (Basel) Article Nanohybrids of graphene and two-dimensional (2D) layered transition metal dichalcogenides (TMD) nanostructures can provide a promising substrate for extraordinary surface-enhanced Raman spectroscopy (SERS) due to the combined electromagnetic enhancement on TMD nanostructures via localized surface plasmonic resonance (LSPR) and chemical enhancement on graphene. In these nanohybrid SERS substrates, the LSPR on TMD nanostructures is affected by the TMD morphology. Herein, we report the first successful growth of MoS(2) nanodonuts (N-donuts) on graphene using a vapor transport process on graphene. Using Rhodamine 6G (R6G) as a probe, SERS spectra were compared on MoS(2) N-donuts/graphene nanohybrids substrates. A remarkably high R6G SERS sensitivity up to 2 × 10(−12) M has been obtained, which can be attributed to the more robust LSPR effect than in other TMD nanostructures such as nanodiscs as suggested by the finite-difference time-domain simulation. This result demonstrates that non-metallic TMD/graphene nanohybrids substrates can have SERS sensitivity up to one order of magnitude higher than that reported on the plasmonic metal nanostructures/2D materials SERS substrates, providing a promising scheme for high-sensitivity, low-cost applications for biosensing. MDPI 2021-11-25 /pmc/articles/PMC8699280/ /pubmed/34940234 http://dx.doi.org/10.3390/bios11120477 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ghopry, Samar Ali
Sadeghi, Seyed M.
Berrie, Cindy L.
Wu, Judy Z.
MoS(2) Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy
title MoS(2) Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy
title_full MoS(2) Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy
title_fullStr MoS(2) Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy
title_full_unstemmed MoS(2) Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy
title_short MoS(2) Nanodonuts for High-Sensitivity Surface-Enhanced Raman Spectroscopy
title_sort mos(2) nanodonuts for high-sensitivity surface-enhanced raman spectroscopy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8699280/
https://www.ncbi.nlm.nih.gov/pubmed/34940234
http://dx.doi.org/10.3390/bios11120477
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