Disordered plasmonic system with dense copper nano‐island morphology

Dry synthesis is a highly versatile method for the fabrication of nanoporous metal films, since it enables easy and reproducible deposition of single or multi-layers of nanostructured materials that can find intriguing applications in plasmonics, photochemistry and photocatalysis, to name a few. Here, we extend the use of this methodology to the preparation of copper nano-islands that represent an affordable and versatile example of disordered plasmonic substrates. Although the island morphology is disordered, the high density of these nanostructures with large surface area results in a good homogeneity on a macroscale, which is beneficial for plasmonic applications such as bio-sensing and photo-catalysis. With cathodoluminescence and electron-energy-loss spectroscopies we confirm the nano-islands as sources of the local field enhancement and identify the plasmonic resonance bands in the visible and near-infrared spectral range. The decay dynamics of the plasmonic signal are slower in the nano-island as compared to bulk copper films, which can be rationalized by a reduced energy dissipation in the nano-island films. Our study demonstrates a robust and lithography-free fabrication pathway to obtain nanostructured plasmonic copper substrates that represent a highly versatile low-cost alternative for future applications ranging from sensing to photochemistry and photocatalysis.

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Publication Details

Journal
Nanophotonics
Published
2025-04-24
DOI
https://doi.org/10.1515/nanoph-2024-0743
Citations
4
Primary Topic
Gold and Silver Nanoparticles Synthesis and Applications
Type
article
Field-Weighted Citation Impact
1.71

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article

Disordered plasmonic system with dense copper nano‐island morphology

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Nanophotonics
Gold and Silver Nanoparticles Synthesis and Applications
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article

Disordered plasmonic system with dense copper nano‐island morphology

Gianluca Balestra, Andrea Griesi, Massimo Cuscunà, Roman Krahne, Yurii P. Ivanov, Paolo Franceschini, Giorgio Divitini, Nicolò Maccaferri, Costantino De Angelis, Hyunah Kwon, Vincenzo Caligiuri, Denis Garoli, Peer Fischer, Аnastasiia S. Sapunova, Tlek Tapani, Andrea Tognazzi, Haifeng Lin, Yanqiu Zou, Riccardo Carzino
article en
4 citations

Abstract

Dry synthesis is a highly versatile method for the fabrication of nanoporous metal films, since it enables easy and reproducible deposition of single or multi-layers of nanostructured materials that can find intriguing applications in plasmonics, photochemistry and photocatalysis, to name a few. Here, we extend the use of this methodology to the preparation of copper nano-islands that represent an affordable and versatile example of disordered plasmonic substrates. Although the island morphology is disordered, the high density of these nanostructures with large surface area results in a good homogeneity on a macroscale, which is beneficial for plasmonic applications such as bio-sensing and photo-catalysis. With cathodoluminescence and electron-energy-loss spectroscopies we confirm the nano-islands as sources of the local field enhancement and identify the plasmonic resonance bands in the visible and near-infrared spectral range. The decay dynamics of the plasmonic signal are slower in the nano-island as compared to bulk copper films, which can be rationalized by a reduced energy dissipation in the nano-island films. Our study demonstrates a robust and lithography-free fabrication pathway to obtain nanostructured plasmonic copper substrates that represent a highly versatile low-cost alternative for future applications ranging from sensing to photochemistry and photocatalysis.

NanophotonicsVol. 14(12)
University of Modena and Reggio Emilia (IT), Heidelberg University (DE), Italian Institute of Technology (IT), Max Planck Institute for Medical Research (DE), Istituto di Nanotecnologia (IT), University Hospital of Umeå (SE), University of Calabria (IT), Zhejiang University (CN), University of Brescia (IT), University of Palermo (IT), Umeå University (SE)
HORIZON EUROPE European Innovation Council
Openalex Percentile: Top 16%
Gold and Silver Nanoparticles Synthesis and Applications
1.71
DOIOpen Access PDFOpenAlex
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