Highly stable Ag-SiO2 nanoparticle composites were first obtained by laser ablation of a silver target in an aqueous colloidal dispersion of silica and examined by UV-vis absorption spectroscopy, transmission electron microscopy and Raman spectroscopy. The surface enhanced Raman scattering (SERS) activity of these nanocomposites was tested using 2,2'-bipyridine as a molecular reporter and excitation in the visible and near-IR spectral regions. The computational DFT approach provided evidence of ligand adsorption on positively charged adatoms of the silver nanostructured surface, in a very similar way to the metal/molecule interaction occurring in the corresponding Ag(I) coordination compound.
SERS active Ag-SiO2 nanoparticles obtained by laser ablation of silver in colloidal silica / Gellini, Cristina; Muniz-Miranda, Francesco; Pedone, Alfonso; Muniz-Miranda, Maurizio. - In: BEILSTEIN JOURNAL OF NANOTECHNOLOGY. - ISSN 2190-4286. - 9:1(2018), pp. 2396-2404. [10.3762/bjnano.9.224]
SERS active Ag-SiO2 nanoparticles obtained by laser ablation of silver in colloidal silica
Muniz-Miranda, Francesco;Pedone, Alfonso;
2018
Abstract
Highly stable Ag-SiO2 nanoparticle composites were first obtained by laser ablation of a silver target in an aqueous colloidal dispersion of silica and examined by UV-vis absorption spectroscopy, transmission electron microscopy and Raman spectroscopy. The surface enhanced Raman scattering (SERS) activity of these nanocomposites was tested using 2,2'-bipyridine as a molecular reporter and excitation in the visible and near-IR spectral regions. The computational DFT approach provided evidence of ligand adsorption on positively charged adatoms of the silver nanostructured surface, in a very similar way to the metal/molecule interaction occurring in the corresponding Ag(I) coordination compound.File | Dimensione | Formato | |
---|---|---|---|
art103.pdf
Open access
Tipologia:
VOR - Versione pubblicata dall'editore
Dimensione
1.44 MB
Formato
Adobe PDF
|
1.44 MB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris