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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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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. |
format | Online Article Text |
id | pubmed-8153338 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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