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Plasmonic Properties of Aluminum Nanocylinders in the Visible Range ArchiMer
Gillibert, Raymond; Colas, Florent; Yasukuni, Ryohei; Picardi, Gennaro; Lamy De La Chapelle, Marc.
Plasmonic and surface enhanced Raman scattering (SERS) studies have been performed on aluminium nanocylinders arrays of different diameters. We observed sharps localised surface plasmon resonance (LSPR) peaks that can be tuned on the whole visible range and having the same behaviour than gold nanocylinders. The near-field enhancement was measured by SERS on probe molecules as well as on the indium tin oxide (ITO) substrate using two excitation wavelengths: 660 and 785 nm. No SERS signal of the probe molecul
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00367/47865/47861.pdf
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Red-Shift Effects in Surface Enhanced Raman Spectroscopy: Spectral or Intensity Dependence of the Near-Field? ArchiMer
Colas, Florent; Cottat, Maximilien; Gillibert, Raymond; Guillot, Nicolas; Djaker, Nadia; Lidgi-guigui, Nathalie; Toury, Timothee; Barchiesi, Dominique; Toma, Andrea; Di Fabrizio, Enzo; Gucciardi, Pietro G.; De La Chapelle, Marc Lamy.
Optimum amplification in Surface Enhanced Raman Scattering (SERS) from individual nanoantennas is expected when the excitation is slightly blue-shifted with respect to the Localized Surface Plasmon Resonance (LSPR), so that the LSPR peak falls in the middle between the laser and the Stokes Raman emission. Recent experiments have shown when moving the excitation from the visible to the near-infrared that this rule of thumb is no more valid. The excitation has to be red-shifted with respect to the LSPR peak, up to 80nm, to obtain highest SERS. Such discrepancy is usually attributed to a Near-Field (NF) to Far-Field (FF) spectral shift. Here we critically discuss this hypothesis for the case of gold nanocylinders. By combining multi-wavelength excitation SERS...
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Ano: 2016 URL: https://archimer.ifremer.fr/doc/00341/45234/44668.pdf
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