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Towards Wireless Detection of Surface Modification of Silicon Nanowires by an RF Approach

This paper shows the possibility to detect the presence of grafted molecules on the surface of silicon nanowires with a wireless RF radar approach based on the measurement of the backscattered signal of a resonant structure on which the nanowires are deposited. The measured resonance frequency allow...

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Autores principales: Requena, Florian, Ahoulou, Samuel, Barbot, Nicolas, Kaddour, Darine, Nedelec, Jean-Marie, Baron, Thierry, Perret, Etienne
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9735642/
https://www.ncbi.nlm.nih.gov/pubmed/36500858
http://dx.doi.org/10.3390/nano12234237
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author Requena, Florian
Ahoulou, Samuel
Barbot, Nicolas
Kaddour, Darine
Nedelec, Jean-Marie
Baron, Thierry
Perret, Etienne
author_facet Requena, Florian
Ahoulou, Samuel
Barbot, Nicolas
Kaddour, Darine
Nedelec, Jean-Marie
Baron, Thierry
Perret, Etienne
author_sort Requena, Florian
collection PubMed
description This paper shows the possibility to detect the presence of grafted molecules on the surface of silicon nanowires with a wireless RF radar approach based on the measurement of the backscattered signal of a resonant structure on which the nanowires are deposited. The measured resonance frequency allows the determination of the intrinsic properties related to temperature and humidity variations, which can be related to the presence of the grafted molecules. Several functionalizations of nanowires have been realized and characterized. For the first time, an RF approach is used to detect significant differences related to the presence of grafted molecules on the surface of nanowires. In addition to detecting their presence, the obtained results show the potential of the radar approach to identify the type of functionalization of nanowires. A set of six different grafted molecules (including octadecyltrichlorosilane, ethynylpyrene, N3) was tested and correctly separated with the proposed approach. Various measurements of the same samples showed a good repeatability which made the approach compatible with the possibility of differentiating the molecules with each other by radar reading. Moreover, discussions about the application of such functionalizations are made to increase the sensibility of sensors using a radar approach.
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spelling pubmed-97356422022-12-11 Towards Wireless Detection of Surface Modification of Silicon Nanowires by an RF Approach Requena, Florian Ahoulou, Samuel Barbot, Nicolas Kaddour, Darine Nedelec, Jean-Marie Baron, Thierry Perret, Etienne Nanomaterials (Basel) Article This paper shows the possibility to detect the presence of grafted molecules on the surface of silicon nanowires with a wireless RF radar approach based on the measurement of the backscattered signal of a resonant structure on which the nanowires are deposited. The measured resonance frequency allows the determination of the intrinsic properties related to temperature and humidity variations, which can be related to the presence of the grafted molecules. Several functionalizations of nanowires have been realized and characterized. For the first time, an RF approach is used to detect significant differences related to the presence of grafted molecules on the surface of nanowires. In addition to detecting their presence, the obtained results show the potential of the radar approach to identify the type of functionalization of nanowires. A set of six different grafted molecules (including octadecyltrichlorosilane, ethynylpyrene, N3) was tested and correctly separated with the proposed approach. Various measurements of the same samples showed a good repeatability which made the approach compatible with the possibility of differentiating the molecules with each other by radar reading. Moreover, discussions about the application of such functionalizations are made to increase the sensibility of sensors using a radar approach. MDPI 2022-11-28 /pmc/articles/PMC9735642/ /pubmed/36500858 http://dx.doi.org/10.3390/nano12234237 Text en © 2022 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
Requena, Florian
Ahoulou, Samuel
Barbot, Nicolas
Kaddour, Darine
Nedelec, Jean-Marie
Baron, Thierry
Perret, Etienne
Towards Wireless Detection of Surface Modification of Silicon Nanowires by an RF Approach
title Towards Wireless Detection of Surface Modification of Silicon Nanowires by an RF Approach
title_full Towards Wireless Detection of Surface Modification of Silicon Nanowires by an RF Approach
title_fullStr Towards Wireless Detection of Surface Modification of Silicon Nanowires by an RF Approach
title_full_unstemmed Towards Wireless Detection of Surface Modification of Silicon Nanowires by an RF Approach
title_short Towards Wireless Detection of Surface Modification of Silicon Nanowires by an RF Approach
title_sort towards wireless detection of surface modification of silicon nanowires by an rf approach
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9735642/
https://www.ncbi.nlm.nih.gov/pubmed/36500858
http://dx.doi.org/10.3390/nano12234237
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