Nanoporous materials represent a unique class of materials, given to their unforeseen magnetic, mechanical, optical and catalytic properties arising from their network of pores and ligaments. Here a polycrystalline thin film of FePd is considered as a starting system, in which the porosity is induced via dealloying. This process determines the removal of iron from the alloy and the diffusion of palladium on the surface, which in turn influences the evolution of the material's composition, magnetic properties and optical properties. In addition, from the magnetic point of view, the material acquires a more isotropic behaviour while the magnetic moment decreases due to the removal of iron. In the same way, there is an improvement of the surface enhanced Raman scattering as the dealloying proceeds, due to the formation of clusters of palladium on the surface. This mixture of optical and magnetic properties, combined with its high corrosion resistance and biocompatibility, gives the system a strong multifunctional connotation, paving the way for new applications, ranging from magnetic trapping to detection of low concentration of molecules.

Nanoporous FePd alloy as multifunctional ferromagnetic SERS-active substrate / Cialone, M; Celegato, F; Scaglione, F; Barrera, G; Raj, D; Coisson, M; Tiberto, P; Rizzi, P. - In: APPLIED SURFACE SCIENCE. - ISSN 0169-4332. - 543:(2021), p. 148759. [10.1016/j.apsusc.2020.148759]

Nanoporous FePd alloy as multifunctional ferromagnetic SERS-active substrate

Cialone, M;Celegato, F;Barrera, G;Coisson, M;Tiberto, P;Rizzi, P
2021

Abstract

Nanoporous materials represent a unique class of materials, given to their unforeseen magnetic, mechanical, optical and catalytic properties arising from their network of pores and ligaments. Here a polycrystalline thin film of FePd is considered as a starting system, in which the porosity is induced via dealloying. This process determines the removal of iron from the alloy and the diffusion of palladium on the surface, which in turn influences the evolution of the material's composition, magnetic properties and optical properties. In addition, from the magnetic point of view, the material acquires a more isotropic behaviour while the magnetic moment decreases due to the removal of iron. In the same way, there is an improvement of the surface enhanced Raman scattering as the dealloying proceeds, due to the formation of clusters of palladium on the surface. This mixture of optical and magnetic properties, combined with its high corrosion resistance and biocompatibility, gives the system a strong multifunctional connotation, paving the way for new applications, ranging from magnetic trapping to detection of low concentration of molecules.
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0169433220335182-main.pdf

non disponibili

Tipologia: final published article (publisher’s version)
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 3.81 MB
Formato Adobe PDF
3.81 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
NP_SERS_verAprile2020 (1).pdf

Open Access dal 21/12/2022

Tipologia: accepted manuscript (author’s post-print)
Licenza: Creative Commons
Dimensione 27.11 MB
Formato Adobe PDF
27.11 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/72958
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 15
social impact