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  Dry synthesis of bi-layer nanoporous metal films as plasmonic metamaterial

Caligiuri, V., Kwon, H., Griesi, A., Ivanov, Y. P., Schirato, A., Alabastri, A., et al. (2024). Dry synthesis of bi-layer nanoporous metal films as plasmonic metamaterial. Nanophotonics, 13(7), 1159-1167. doi:10.1515/nanoph-2023-0942.

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 Creators:
Caligiuri, Vincenzo, Author
Kwon, Hyunah1, Author                 
Griesi, Andrea, Author
Ivanov, Yurii P., Author
Schirato, Andrea, Author
Alabastri, Alessandro, Author
Cuscunà, Massimo, Author
Balestra, Gianluca, Author
Luca, Antonio De, Author
Tapani, Tlek, Author
Lin, Haifeng, Author
Maccaferri, Nicolo, Author
Krahne, Roman, Author
Divitini, Giorgio, Author
Fischer, Peer1, Author                 
Garoli, Denis, Author
Affiliations:
1Max Planck Institute for Medical Research, Max Planck Society, ou_1125545              

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Free keywords: nanoporous metal; plasmonics; multilayer; EELS; catholuminescence
 Abstract: Nanoporous metals are a class of nanostructured materials finding extensive applications in multiple fields thanks to their unique properties attributed to their high surface area and interconnected nanoscale ligaments. They can be prepared following different strategies, but the deposition of an arbitrary pure porous metal is still challenging. Recently, a dry synthesis of nanoporous films based on the plasma treatment of metal thin layers deposited by physical vapour deposition has been demonstrated, as a general route to form pure nanoporous films from a large set of metals. An interesting aspect related to this approach is the possibility to apply the same methodology to deposit the porous films as a multilayer. In this way, it is possible to explore the properties of different porous metals in close contact. As demonstrated in this paper, interesting plasmonic properties emerge in a nanoporous Au–Ag bi-layer. The versatility of the method coupled with the possibility to include many different metals, provides an opportunity to tailor their optical resonances and to exploit the chemical and mechanical properties of components, which is of great interest to applications ranging from sensing, to photochemistry and photocatalysis.

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Language(s): eng - English
 Dates: 2023-12-232024-02-272024-03-122024-03-12
 Publication Status: Issued
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1515/nanoph-2023-0942
 Degree: -

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Title: Nanophotonics
Source Genre: Journal
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Publ. Info: Berlin, Germany : de Gruyter
Pages: - Volume / Issue: 13 (7) Sequence Number: - Start / End Page: 1159 - 1167 Identifier: ISSN: 2192-8614
CoNE: https://pure.mpg.de/cone/journals/resource/2192-8614