Article (Scientific journals)
Dense Arrays of Nanohelices: Raman Scattering from Achiral Molecules Reveals the Near-field Enhancements at Chiral Metasurfaces.
Jones, Robin R; Miksch, Cornelia; Kwon, Hyunah et al.
2023In Advanced Materials, p. 2209282
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Keywords :
Raman; SERS; chiral; metasurface; plasmonics; Mechanical Engineering; Mechanics of Materials; General Materials Science
Abstract :
[en] Against the background of the current healthcare and climate emergencies, surface enhanced Raman scattering (SERS) is becoming a highly topical technique for identifying and fingerprinting molecules, e.g. within viruses, bacteria, drugs, and atmospheric aerosols. Crucial for SERS is the need for substrates with strong and reproducible enhancements of the Raman signal over large areas and with a low fabrication cost. Here, we investigate dense arrays of plasmonic nanohelices (∼100 nm in length) that are of interest for many advanced nanophotonics applications, and we show that they present excellent SERS properties. As an illustration, we present two new ways to probe near-field enhancement generated with circular polarization at chiral metasurfaces, first using the Raman spectra of achiral molecules (crystal violet) and second using a single, element-specific, achiral molecular vibrational mode (i.e. a single Raman peak). The nanohelices can be fabricated over large areas at a low cost and they provide strong, robust and uniform Raman enhancement. We anticipate that these advanced materials will find broad applications in surface enhanced Raman spectroscopies and material science.
Disciplines :
Physics
Author, co-author :
Jones, Robin R;  Centre for Photonics and Photonic Materials and Centre for Nanoscience and Nanotechnology, Department of Physics, University of Bath, Claverton Down, BA2 7AY, United Kingdom
Miksch, Cornelia;  Max Planck Institute for Intelligent Systems, Heisenbergstraße 3, 70569, Stuttgart, Germany
Kwon, Hyunah;  Max Planck Institute for Intelligent Systems, Heisenbergstraße 3, 70569, Stuttgart, Germany
Pothoven, Coosje;  VSPARTICLE, Molengraaffsingel 10, JD Delft, 2629, The Netherlands
Rusimova, Kristina R;  Centre for Photonics and Photonic Materials and Centre for Nanoscience and Nanotechnology, Department of Physics, University of Bath, Claverton Down, BA2 7AY, United Kingdom
Kamp, Maarten;  VSPARTICLE, Molengraaffsingel 10, JD Delft, 2629, The Netherlands
Gong, Kedong;  Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China
Zhang, Liwu;  Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China
Batten, Tim;  Renishaw plc, New Mills, Kingswood, Wotton-under-Edge, GL12 8JR, United Kingdom
Smith, Brian;  Renishaw plc, New Mills, Kingswood, Wotton-under-Edge, GL12 8JR, United Kingdom
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Fischer, Peer;  Max Planck Institute for Intelligent Systems, Heisenbergstraße 3, 70569, Stuttgart, Germany ; Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
Wolverson, Daniel;  Centre for Photonics and Photonic Materials and Centre for Nanoscience and Nanotechnology, Department of Physics, University of Bath, Claverton Down, BA2 7AY, United Kingdom
Valev, Ventsislav K ;  Centre for Photonics and Photonic Materials and Centre for Nanoscience and Nanotechnology, Department of Physics, University of Bath, Claverton Down, BA2 7AY, United Kingdom ; Centre for Therapeutic Innovation, University of Bath, Bath, BA2 7AY, United Kingdom
More authors (4 more) Less
Language :
English
Title :
Dense Arrays of Nanohelices: Raman Scattering from Achiral Molecules Reveals the Near-field Enhancements at Chiral Metasurfaces.
Publication date :
11 January 2023
Journal title :
Advanced Materials
ISSN :
0935-9648
eISSN :
1521-4095
Publisher :
Wiley, Germany
Pages :
e2209282
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 January 2023

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