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Preparation of Fe(3)O(4)-Ag Nanocomposites with Silver Petals for SERS Application

The formation of silver nanopetal-Fe(3)O(4) poly-nanocrystals assemblies and the use of the resulting hetero-nanostructures as active substrates for Surface Enhanced Raman Spectroscopy (SERS) application are here reported. In practice, about 180 nm sized polyol-made Fe(3)O(4) spheres, constituted by...

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Autores principales: Nguyen, Thi Thuy, Mammeri, Fayna, Ammar, Souad, Nguyen, Thi Bich Ngoc, Nguyen, Trong Nghia, Nghiem, Thi Ha Lien, Thuy, Nguyen Thi, Ho, Thi Anh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8153338/
https://www.ncbi.nlm.nih.gov/pubmed/34068287
http://dx.doi.org/10.3390/nano11051288
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author Nguyen, Thi Thuy
Mammeri, Fayna
Ammar, Souad
Nguyen, Thi Bich Ngoc
Nguyen, Trong Nghia
Nghiem, Thi Ha Lien
Thuy, Nguyen Thi
Ho, Thi Anh
author_facet Nguyen, Thi Thuy
Mammeri, Fayna
Ammar, Souad
Nguyen, Thi Bich Ngoc
Nguyen, Trong Nghia
Nghiem, Thi Ha Lien
Thuy, Nguyen Thi
Ho, Thi Anh
author_sort Nguyen, Thi Thuy
collection PubMed
description The formation of silver nanopetal-Fe(3)O(4) poly-nanocrystals assemblies and the use of the resulting hetero-nanostructures as active substrates for Surface Enhanced Raman Spectroscopy (SERS) application are here reported. In practice, about 180 nm sized polyol-made Fe(3)O(4) spheres, constituted by 10 nm sized crystals, were functionalized by (3-aminopropyl)triethoxysilane (APTES) to become positively charged, which can then electrostatically interact with negatively charged silver seeds. Silver petals were formed by seed-mediated growth in presence of Ag(+) cations and self-assembly, using L-ascorbic acid (L-AA) and polyvinyl pyrrolidone (PVP) as mid-reducing and stabilizing agents, respectively. The resulting plasmonic structure provides a rough surface with plenty of hot spots able to locally enhance significantly any applied electrical field. Additionally, they exhibited a high enough saturation magnetization with M(s) = 9.7 emu g(−1) to be reversibly collected by an external magnetic field, which shortened the detection time. The plasmonic property makes the engineered Fe(3)O(4)-Ag architectures particularly valuable for magnetically assisted ultra-sensitive SERS sensing. This was unambiguously established through the successful detection, in water, of traces, (down to 10(−10) M) of Rhodamine 6G (R6G), at room temperature.
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spelling pubmed-81533382021-05-27 Preparation of Fe(3)O(4)-Ag Nanocomposites with Silver Petals for SERS Application Nguyen, Thi Thuy Mammeri, Fayna Ammar, Souad Nguyen, Thi Bich Ngoc Nguyen, Trong Nghia Nghiem, Thi Ha Lien Thuy, Nguyen Thi Ho, Thi Anh Nanomaterials (Basel) Article The formation of silver nanopetal-Fe(3)O(4) poly-nanocrystals assemblies and the use of the resulting hetero-nanostructures as active substrates for Surface Enhanced Raman Spectroscopy (SERS) application are here reported. In practice, about 180 nm sized polyol-made Fe(3)O(4) spheres, constituted by 10 nm sized crystals, were functionalized by (3-aminopropyl)triethoxysilane (APTES) to become positively charged, which can then electrostatically interact with negatively charged silver seeds. Silver petals were formed by seed-mediated growth in presence of Ag(+) cations and self-assembly, using L-ascorbic acid (L-AA) and polyvinyl pyrrolidone (PVP) as mid-reducing and stabilizing agents, respectively. The resulting plasmonic structure provides a rough surface with plenty of hot spots able to locally enhance significantly any applied electrical field. Additionally, they exhibited a high enough saturation magnetization with M(s) = 9.7 emu g(−1) to be reversibly collected by an external magnetic field, which shortened the detection time. The plasmonic property makes the engineered Fe(3)O(4)-Ag architectures particularly valuable for magnetically assisted ultra-sensitive SERS sensing. This was unambiguously established through the successful detection, in water, of traces, (down to 10(−10) M) of Rhodamine 6G (R6G), at room temperature. MDPI 2021-05-13 /pmc/articles/PMC8153338/ /pubmed/34068287 http://dx.doi.org/10.3390/nano11051288 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
Nguyen, Thi Thuy
Mammeri, Fayna
Ammar, Souad
Nguyen, Thi Bich Ngoc
Nguyen, Trong Nghia
Nghiem, Thi Ha Lien
Thuy, Nguyen Thi
Ho, Thi Anh
Preparation of Fe(3)O(4)-Ag Nanocomposites with Silver Petals for SERS Application
title Preparation of Fe(3)O(4)-Ag Nanocomposites with Silver Petals for SERS Application
title_full Preparation of Fe(3)O(4)-Ag Nanocomposites with Silver Petals for SERS Application
title_fullStr Preparation of Fe(3)O(4)-Ag Nanocomposites with Silver Petals for SERS Application
title_full_unstemmed Preparation of Fe(3)O(4)-Ag Nanocomposites with Silver Petals for SERS Application
title_short Preparation of Fe(3)O(4)-Ag Nanocomposites with Silver Petals for SERS Application
title_sort preparation of fe(3)o(4)-ag nanocomposites with silver petals for sers application
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8153338/
https://www.ncbi.nlm.nih.gov/pubmed/34068287
http://dx.doi.org/10.3390/nano11051288
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