Tunable gold nanostars for surface enhanced Raman spectroscopy
| Autor: | Giovanna Brusatin, Alessio Rindi, Emilia Giorgetti, Laura Brigo, Giancarlo Margheri, Iljiana Timtcheva, Maurizio Muniz-Miranda, Stefano Sottini, Giovanna Dellepiane, Silvana Trigari |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Nanostructure
Materials science SERS Nanotechnology Surface-enhanced Raman spectroscopy Condensed Matter Physics Fluorescence Electronic Optical and Magnetic Materials Wavelength symbols.namesake FTIR Transmission electron microscopy Raman spectroscopy symbols Surface modification gold nanostars Fourier transform infrared spectroscopy |
| Zdroj: | Physica status solidi. B, Basic research 249 (2012): 1188–1192. doi:10.1002/pssb.201100488 info:cnr-pdr/source/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)/titolo:Tunable gold nanostars for surface enhanced Raman spectroscopy/doi:10.1002%2Fpssb.201100488/rivista:Physica status solidi. B, Basic research/anno:2012/pagina_da:1188/pagina_a:1192/intervallo_pagine:1188–1192/volume:249 |
| DOI: | 10.1002/pssb.201100488 |
| Popis: | 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 UV–Vis 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. |
| Databáze: | OpenAIRE |
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