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Enhanced Near-Field Chirality in Periodic Arrays of Si Nanowires for Chiral Sensing

Nanomaterials can be specially designed to enhance optical chirality and their interaction with chiral molecules can lead to enhanced enantioselectivity. Here we propose periodic arrays of Si nanowires for the generation of enhanced near-field chirality. Such structures confine the incident electrom...

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Detalles Bibliográficos
Autores principales: Petronijevic, Emilija, Sibilia, Concita
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6429513/
https://www.ncbi.nlm.nih.gov/pubmed/30823382
http://dx.doi.org/10.3390/molecules24050853
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author Petronijevic, Emilija
Sibilia, Concita
author_facet Petronijevic, Emilija
Sibilia, Concita
author_sort Petronijevic, Emilija
collection PubMed
description Nanomaterials can be specially designed to enhance optical chirality and their interaction with chiral molecules can lead to enhanced enantioselectivity. Here we propose periodic arrays of Si nanowires for the generation of enhanced near-field chirality. Such structures confine the incident electromagnetic field into specific resonant modes, which leads to an increase in local optical chirality. We investigate and optimize near-field chirality with respect to the geometric parameters and excitation scheme. Specially, we propose a simple experiment for the enhanced enantioselectivity, and optimize the average chirality depending on the possible position of the chiral molecule. We believe that such a simple achiral nanowire approach can be functionalized to give enhanced chirality in the spectral range of interest and thus lead to better discrimination of enantiomers.
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spelling pubmed-64295132019-04-15 Enhanced Near-Field Chirality in Periodic Arrays of Si Nanowires for Chiral Sensing Petronijevic, Emilija Sibilia, Concita Molecules Article Nanomaterials can be specially designed to enhance optical chirality and their interaction with chiral molecules can lead to enhanced enantioselectivity. Here we propose periodic arrays of Si nanowires for the generation of enhanced near-field chirality. Such structures confine the incident electromagnetic field into specific resonant modes, which leads to an increase in local optical chirality. We investigate and optimize near-field chirality with respect to the geometric parameters and excitation scheme. Specially, we propose a simple experiment for the enhanced enantioselectivity, and optimize the average chirality depending on the possible position of the chiral molecule. We believe that such a simple achiral nanowire approach can be functionalized to give enhanced chirality in the spectral range of interest and thus lead to better discrimination of enantiomers. MDPI 2019-02-28 /pmc/articles/PMC6429513/ /pubmed/30823382 http://dx.doi.org/10.3390/molecules24050853 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Petronijevic, Emilija
Sibilia, Concita
Enhanced Near-Field Chirality in Periodic Arrays of Si Nanowires for Chiral Sensing
title Enhanced Near-Field Chirality in Periodic Arrays of Si Nanowires for Chiral Sensing
title_full Enhanced Near-Field Chirality in Periodic Arrays of Si Nanowires for Chiral Sensing
title_fullStr Enhanced Near-Field Chirality in Periodic Arrays of Si Nanowires for Chiral Sensing
title_full_unstemmed Enhanced Near-Field Chirality in Periodic Arrays of Si Nanowires for Chiral Sensing
title_short Enhanced Near-Field Chirality in Periodic Arrays of Si Nanowires for Chiral Sensing
title_sort enhanced near-field chirality in periodic arrays of si nanowires for chiral sensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6429513/
https://www.ncbi.nlm.nih.gov/pubmed/30823382
http://dx.doi.org/10.3390/molecules24050853
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