SERS Enhancement and Field Confinement in Nanosensors Based on Self-Organized Gold Nanowires Produced by Ion-Beam Sputtering (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• SERS Enhancement and Field Confinement in Nanosensors Based on Self-Organized Gold Nanowires Produced by Ion-Beam Sputtering (Articolo in rivista) (literal)

Anno

• 2014-01-01T00:00:00+01:00 (literal)

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

• 10.1021/jp5007236 (literal)

Alternative label

• D'Andrea, C.; Fazio, B.; Gucciardi, P. G.; Giordano, M. C.; Martella, C.; Chiappe, D.; Toma, A.; de Mongeot, F. Buatier; Tantussi, F.; Vasanthakumar, P.; Fuso, F.; Allegrini, M. (2014)
  SERS Enhancement and Field Confinement in Nanosensors Based on Self-Organized Gold Nanowires Produced by Ion-Beam Sputtering
  in Journal of physical chemistry. C
  (literal)

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

• D'Andrea, C.; Fazio, B.; Gucciardi, P. G.; Giordano, M. C.; Martella, C.; Chiappe, D.; Toma, A.; de Mongeot, F. Buatier; Tantussi, F.; Vasanthakumar, P.; Fuso, F.; Allegrini, M. (literal)

Pagina inizio

• 8571 (literal)

Pagina fine

• 8580 (literal)

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

• 118 (literal)

Rivista

• Journal of physical chemistry. C (Rivista)

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

• 10 (literal)

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

• 16 (literal)

Note

• Scopus (literal)
• ISI Web of Science (WOS) (literal)

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

• CNR IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D'Alcontres 37, I-98156 Messina, Italy; Dipartimento di Fisica, Università di Genova, CNISM, Via Dodecaneso 33, I-16146 Genova, Italy; Dipartimento di Fisica Enrico Fermi, Università di Pisa and INO-CNR, Sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy; Laboratorio MDM CNR-IMM, Via C. Olivetti 2, Agrate Brianza (MB), I-20864, Italy; Nanostructures, Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy (literal)

Titolo

• SERS Enhancement and Field Confinement in Nanosensors Based on Self-Organized Gold Nanowires Produced by Ion-Beam Sputtering (literal)

Abstract

• Since its discovery, surface-enhanced Raman spectroscopy (SERS) has pushed researchers' interest to develop different kinds of active substrates for high sensitivity molecular detection. Defocused ion beam sputtering (IBS) represents a viable route for the production of large scale, highly reproducible SERS-active substrates consisting of near-field coupled nanowires featuring localized surface plasmon resonances in the visible and the near-infrared. Here we investigate the field enhancement and spatial confinement in the visible and the near-infrared of arrays of optically resonant gold nanowires, using two complementary techniques: SERS and scanning near-field optical microscopy (SNOM). While SERS allows us to quantify the field enhancement factor, SNOM is used to image the localization of the enhanced electromagnetic fields. We show that in the visible (633 nm) the nanowires are SERS active only for excitation polarized parallel to the wire-to-wire nanocavities, yielding enhancement factors of 7 X 10(3). In the near-infrared (785 nm) we observe a 2-fold larger SERS enhancement (1.3 x 10(4)) for excitation parallel to the nanocavities and detect the onset of SERS amplification for excitation polarization parallel to the nanowires long axis. Polarization-sensitive SNOM in the near-infrared (830 nm) enables the correlation of the scattered intensity with the sample morphology at the local scale. We demonstrate that the field enhancement stems from the wire-to-wire nanocavity regions when the excitation field is polarized parallel to the wire-to-wire nanocavity, while we observe more complex field confinement patterns related to the partially inhomogeneous morphology of the substrate when the polarization is parallel to the nanowires long axis. Our experiments strongly suggest IBS-fabricated nanowires as novel substrates for plasmon-enhanced spectroscopies. (literal)

Prodotto di

• Spettroscopia, Imaging e Intrappolamento di nanosistemi colloidali, supramolecolari e superfici (MD.P01.014.006) (Modulo)
• Microscopia Confocale e a Sonda (MD.P03.022.004) (Modulo)
• Istituto per i processi chimico-fisici (IPCF) (Istituto)

Autore CNR

• FRANCESCO FUSO (Unità di personale esterno)
• FRANCESCO TANTUSSI (Persona)
• CRISTIANO D'ANDREA (Unità di personale esterno)
• PIETRO GIUSEPPE GUCCIARDI (Persona)
• MARIA ALLEGRINI (Persona)
• BARBARA FAZIO (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "SERS Enhancement and Field Confinement in Nanosensors Based on Self-Organized Gold Nanowires Produced by Ion-Beam Sputtering" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• Spettroscopia, Imaging e Intrappolamento di nanosistemi colloidali, supramolecolari e superfici (MD.P01.014.006) (Modulo)
• Microscopia Confocale e a Sonda (MD.P03.022.004) (Modulo)

Autore CNR di

• BARBARA FAZIO (Unità di personale interno)
• PIETRO GIUSEPPE GUCCIARDI (Persona)
• FRANCESCO FUSO (Unità di personale esterno)
• MARIA ALLEGRINI (Persona)
• CRISTIANO D'ANDREA (Unità di personale esterno)
• FRANCESCO TANTUSSI (Persona)

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

• Journal of physical chemistry. C (Rivista)

Insieme di parole chiave di

• Parole chiave di "SERS Enhancement and Field Confinement in Nanosensors Based on Self-Organized Gold Nanowires Produced by Ion-Beam Sputtering" (Insieme di parole chiave)