http://www.cnr.it/ontology/cnr/individuo/prodotto/ID194329

Tunable gold nanostars for surface enhanced Raman spectroscopy (Articolo in rivista)

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Tunable gold nanostars for surface enhanced Raman spectroscopy (Articolo in rivista) (literal)

Anno

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Alternative label

Giorgetti Emilia (1); Trigari Silvana (1); Rindi Alessio (2); Margheri Giancarlo (1); Sottini Stefano (1); Dellepiane Giovanna (2); Brusatin Giovanna (3); Brigo Laura (3); Muniz-Miranda Maurizio (4); Timtcheva Iljiana (5) (2012)
Tunable gold nanostars for surface enhanced Raman spectroscopy
in Physica status solidi. B, Basic research; WILEY-V C H VERLAG GMBH,, D-69451 WEINHEIM, (Germania)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Giorgetti Emilia (1); Trigari Silvana (1); Rindi Alessio (2); Margheri Giancarlo (1); Sottini Stefano (1); Dellepiane Giovanna (2); Brusatin Giovanna (3); Brigo Laura (3); Muniz-Miranda Maurizio (4); Timtcheva Iljiana (5) (literal)

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http://onlinelibrary.wiley.com/doi/10.1002/pssb.201100488/abstract;jsessionid=3F1999D0D8E89D349A6D8F6A6232AD01.d04t04 (literal)

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1) Institute of Complex Systems CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Firenze, Italy 2) Department of Chemistry and Industrial Chemistry, University of Genova, Genova, Italy 3) Department of Mechanical Engineering, University of Padova, Padova, Italy 4) Department of Chemistry ''Ugo Schiff'', University of Firenze, Sesto Fiorentino, Firenze, Italy 5) Institute of Organic Chemistry with Centre of Phytochemistry Bulgarian Academy of Sciences, Sofia, Bulgaria (literal)

Titolo

Abstract

We fabricated stable gold nanostars (AuNSs) with tunable extinction properties from the visible spectral region up to 1800?nm, depending on the average values of core size and branch length. The results of their UVVis and transmission electron microscopy characterization are compared with computational data from finite elements method, which makes use of an approximated model of the branched structures. The theoretical computations put in evidence the existence of hot spots located on the tips of the nanostars even up to 1800?nm wavelength, which opens the way to the improvement of diagnostics in the IR region. Preliminary Fourier transform Raman experiments performed after functionalization with a fluorescent dye bearing end thiol groups seem to confirm the field enhancing capability of the nanostructures at 1064?nm. (literal)

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