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Article Dans Une Revue Applied Nanoscience Année : 2023

Highlight on commercial SERS substrates and on optimized nanorough large-area SERS-based sensors: a Raman study

Résumé

Surface enhanced Raman spectroscopy (SERS) is a powerful non-invasive technique to detect and identify molecule traces. The accurate identification of molecules is based on the detection of distinctive vibrational modes characteristic of a molecule adsorbed onto the surface. We investigated the detection performances of three commercial SERS substrates: nanostructured Au supports from Hamamatsu, Premium Ag–Au supports from SERSitive, and RAM–SERS–Au from Ocean Insight, which were tested with solutions of thiophenol (C6H6S) at 10–6 M and 10–8 M concentration. SERS measurements were performed systematically with 633 and 785 nm excitation wavelengths and Raman mappings were recorded randomly on the surfaces. The spectral quality (baseline intensity and signal-to-noise ratio), the thermal stability under laser illumination, and the Raman intensity distribution of the Hamamatsu substrate and our own fabricated gold substrate were discussed for the detection of 10–8 M thiophenol molecules. The detection of crystal violet (CV), a toxic dye, is demonstrated at 5.10–9 M.
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hal-04513602 , version 1 (20-03-2024)

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M. Rahmani, P. Taugeron, A. Rousseau, N. Delorme, L. Douillard, et al.. Highlight on commercial SERS substrates and on optimized nanorough large-area SERS-based sensors: a Raman study. Applied Nanoscience, 2023, 14 (1), pp.203-215. ⟨10.1007/s13204-023-02972-6⟩. ⟨hal-04513602⟩
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