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Baibarac, M., Massuyeau, F., Wery, J., Baltog, I. & Lefrant, S. (2012) Raman scattering and anti-Stokes luminescence in poly-paraphenylene vinylene/carbon nanotubes composites. J. Appl. Phys. 111 083109.
Added by: Laurent Cournède (2016-03-10 21:28:39) |
| Type de référence: Article DOI: 10.1063/1.4705403 Numéro d'identification (ISBN etc.): 0021-8979 Clé BibTeX: Baibarac2012a Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: absorption, conjugated polymers, excitation, generation, gold nanoparticles, photoluminescence, poly(p-phenylene vinylene), spectra, temperature Créateurs: Baibarac, Baltog, Lefrant, Massuyeau, Wery Collection: J. Appl. Phys. |
Consultations : 1/563
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| Résumé |
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In this paper, we present Raman scattering and luminescence of poly-paraphenylene vinylene/single-walled carbon nanotubes composites, focused on data recorded in the anti-Stokes branch. We demonstrate that, when the excitation energy is in the long wavelength tail of the fundamental absorption edge, an anti-Stokes signal is generated, whose origin is a photon absorption accompanied by a phonon process from lower to upper vibronic states. The efficiency of this anti-Stokes photo-luminescence is increased when composites films are deposited onto an Au rough surface acting as a surface enhanced Raman scattering substrate. This mechanism is explained by a coherent anti-Stokes Raman scattering-like process, as observed in other nano-structured materials. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705403]
Added by: Laurent Cournède |