Metal to insulator transition for conducting polymers in plasmonic nanogaps.
Journal
Light, science & applications
ISSN: 2047-7538
Titre abrégé: Light Sci Appl
Pays: England
ID NLM: 101610753
Informations de publication
Date de publication:
01 Jan 2024
01 Jan 2024
Historique:
received:
06
07
2023
accepted:
22
11
2023
revised:
17
11
2023
medline:
2
1
2024
pubmed:
2
1
2024
entrez:
31
12
2023
Statut:
epublish
Résumé
Conjugated polymers are promising material candidates for many future applications in flexible displays, organic circuits, and sensors. Their performance is strongly affected by their structural conformation including both electrical and optical anisotropy. Particularly for thin layers or close to crucial interfaces, there are few methods to track their organization and functional behaviors. Here we present a platform based on plasmonic nanogaps that can assess the chemical structure and orientation of conjugated polymers down to sub-10 nm thickness using light. We focus on a representative conjugated polymer, poly(3,4-ethylenedioxythiophene) (PEDOT), of varying thickness (2-20 nm) while it undergoes redox in situ. This allows dynamic switching of the plasmonic gap spacer through a metal-insulator transition. Both dark-field (DF) and surface-enhanced Raman scattering (SERS) spectra track the optical anisotropy and orientation of polymer chains close to a metallic interface. Moreover, we demonstrate how this influences both optical and redox switching for nanothick PEDOT devices.
Identifiants
pubmed: 38161207
doi: 10.1038/s41377-023-01344-7
pii: 10.1038/s41377-023-01344-7
doi:
Types de publication
Journal Article
Langues
eng
Pagination
3Subventions
Organisme : EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council)
ID : 883703
Organisme : Royal Society
ID : RGS\R1\231458
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 62105369
Informations de copyright
© 2024. The Author(s).
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