Enantiomer-selective molecular sensing using racemic nanoplasmonic arrays
| Autor: | Joaquim Puigdollers, Jose Garcia-Guirado, Romain Quidant, Mikael Svedendahl |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Circular dichroism
Optical chirality Materials science Chiral sensing Physics::Optics Bioengineering Nanotechnology 02 engineering and technology medicine.disease_cause 01 natural sciences Plasmons (Physics) Electric field Surface plasmon resonance 0103 physical sciences medicine General Materials Science 010306 general physics Ressonància de plasmons superficials Plasmon Plasmons (Física) Física [Àrees temàtiques de la UPC] Biosensing Mechanical Engineering nanoplasmonics General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Enginyeria biomèdica::Aparells mèdics::Biosensors [Àrees temàtiques de la UPC] Biosensors Enantiomers Racemic mixture Plasmonics Enantiomer 0210 nano-technology Chirality (chemistry) Biosensor Ultraviolet |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname Nano Letters |
| Popis: | This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Nano Letters, copyright © American Chemical Society after peer review. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.nanolett.8b02433, see http://pubs.acs.org/page/policy/articlesonrequest/index.html Building blocks of life show well-defined chiral symmetry which has a direct influence on their properties and role in Nature. Chiral molecules are typically characterized by optical techniques such as circular dichroism (CD) where they exhibit signatures in the ultraviolet frequency region. Plasmonic nanostructures have the potential to enhance the sensitivity of chiral detection and translate the molecular chirality to the visible spectral range. Despite recent progress, to date, it remains unclear which properties plasmonic sensors should exhibit to maximize this effect and apply it to reliable enantiomer discrimination. Here, we bring further insight into this complex problem and present a chiral plasmonic sensor composed of a racemic mixture of gammadions with no intrinsic CD, but high optical chirality and electric field enhancements in the near-fields. Owing to its unique set of properties, this configuration enables us to directly differentiate phenylalanine enantiomers in the visible frequency range. |
| Databáze: | OpenAIRE |
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