Surface enhanced Raman spectroscopy platform based on graphene with one-year stability

Abstract : We report the synthesis, characterization and use of a robust surface enhanced Raman spectroscopy platform with a stable detection for up to one year of Rhodamine R6G at a concentration of 10 −6 M. The detection of aminothiophenol and methyl parathion, as active molecules of commercial insecticides, is further demonstrated at concentrations down to 10 −5 –10 −6 M. This platform is based on large scale textured few-layer (fl) graphene obtained without any need of graphene transfer. The synthesis route is based on diamond-like carbon films grown by pulsed laser deposition, deposited onto silicon substrates covered by a Ni layer prior to diamond-like carbon deposition. The formation of fl-graphene film, confirmed by Raman spectroscopy and mapping, is obtained by thermal annealing inducing the diffusion of Ni atoms and the concomitant formation of nickel silicide compounds , as identified by Raman and Auger electron spectroscopies. The textured fl-graphene films were decorated with gold nanoparticles to optimize the efficiency of the SERS device to detect organic molecules at low concentrations.
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Teddy Tite, Vincent Barnier, Christophe Donnet, Anne-Sophie Loir, Stephanie Reynaud, et al.. Surface enhanced Raman spectroscopy platform based on graphene with one-year stability. Thin Solid Films, Elsevier, 2016, 604, pp.74 - 80. ⟨10.1016/j.tsf.2016.03.024⟩. ⟨hal-01567062⟩

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