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Communication Dans Un Congrès Année : 2014

Plasmonic sensing of the chemical reactivity of bimetallic nanoparticles: a new setup for high-sensitivity optical measurements under controlled environment

J. Ramade
  • Fonction : Auteur
M. Pellarin
  • Fonction : Auteur
A. Bourgey
  • Fonction : Auteur
E. Cottancin
L. Piccolo
Cyril Langlois
M.A. Lebeault
A. Mosset
  • Fonction : Auteur

Résumé

Due to their high surface to volume ratio, metallic nanoparticles (NPs) exhibit specific properties, as for example a huge optical absorption resonance (the so-called Surface Plasmon Resonance (SPR)), depending on the nature of the metal. Furthermore, simple structural or local environment changes of these NPs can bring about large modifications (spectral shift, enlargement, attenuation) of the SPR. Such properties have contributed to the emergence of plasmonics. Considering the catalytic properties of nanoalloys and the influence of the reaction medium on the NP structure, a possible application of plasmonics is to use SPR measurements for monitoring chemical reactions (in situ and operando), occurring at the NP surface. In this communication, we report on the development of a new setup, based on the principle of beam modulation spectrophotometry (fig. 1) for measuring the optical absorption of metallic clusters under a controlled environment. This setup will enable us to observe any change of the SPR under temperature or atmosphere variations, with the goal of exploring chemical reaction kinetics, catalyzed by metallic nanoalloys. This will be illustrated in the case of CuAg nanoalloys of different sizes and stoichiometries, produced with a laser vaporization source and studied under vacuum.
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Dates et versions

hal-01058005 , version 1 (25-08-2014)

Identifiants

  • HAL Id : hal-01058005 , version 1

Citer

J. Ramade, M. Pellarin, A. Bourgey, E. Cottancin, L. Piccolo, et al.. Plasmonic sensing of the chemical reactivity of bimetallic nanoparticles: a new setup for high-sensitivity optical measurements under controlled environment. Nanoalliages 2014, Jun 2014, Strasbourg, France. ⟨hal-01058005⟩
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