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

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 ar...

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Main Authors: Caligiuri, Vincenzo (Author) , Kwon, Hyunah (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, Nicolò (Author) , Krahne, Roman (Author) , Divitini, Giorgio (Author) , Fischer, Peer (Author) , Garoli, Denis (Author)
Format: Article (Journal)
Language:English
Published: 12. März 2024
In: Nanophotonics
Year: 2024, Volume: 13, Issue: 7, Pages: 1159-1167
ISSN:2192-8614
DOI:10.1515/nanoph-2023-0942
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1515/nanoph-2023-0942
Verlag, kostenfrei, Volltext: https://www.degruyterbrill.com/document/doi/10.1515/nanoph-2023-0942/html
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Author Notes:Vincenzo Caligiuri, Hyunah Kwon, Andrea Griesi, Yurii P. Ivanov, Andrea Schirato, Alessandro Alabastri, Massimo Cuscunà, Gianluca Balestra, Antonio De Luca, Tlek Tapani, Haifeng Lin, Nicolò Maccaferri, Roman Krahne, Giorgio Divitini, Peer Fischer and Denis Garoli
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Summary: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.
Item Description:Gesehen am 06.08.2024
Physical Description:Online Resource
ISSN:2192-8614
DOI:10.1515/nanoph-2023-0942

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