Quantitative Determination of the Size Dependence of Surface Plasmon Resonance Damping in Single Ag@SiO2 Nanoparticles - Archive ouverte HAL Access content directly
Journal Articles Nano Letters Year : 2009

Quantitative Determination of the Size Dependence of Surface Plasmon Resonance Damping in Single Ag@SiO2 Nanoparticles

H. Baida
  • Function : Author
Emmanuel Cottancin
Aurelien Crut
Paolo Maioli
Michel Pellarin
Natalia del Fatti
  • Function : Correspondent author
  • PersonId : 865435

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Fabrice Vallée
  • Function : Author
  • PersonId : 902251

Abstract

The optical extinction spectra of single silver nanoparticles coated with a silica shell were investigated in the size range 10-50 nm. Measurements were performed using the spatial modulation spectroscopy technique which permits independent determination of both the size of the metal nanoparticle under study and the width of its localized surface plasmon resonance (LSPR). These parameters can thus be directly correlated at a single particle level for the first time. The results show a linear increase of the width of the LSPR with the inverse diameter in the small size regime (less than 25 nm). For these nanoparticles of well-controlled environment, this can be ascribed to quantum confinement of electrons or, classically, to increase of the electron surface scattering processes. The impact of this effect was measured quantitatively and compared to the predictions by theoretical models.
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Dates and versions

hal-00677050 , version 1 (07-03-2012)

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H. Baida, Pierre Billaud, S. Marhaba, D. Christofilos, Emmanuel Cottancin, et al.. Quantitative Determination of the Size Dependence of Surface Plasmon Resonance Damping in Single Ag@SiO2 Nanoparticles. Nano Letters, 2009, 9 (10), pp.3463-3469. ⟨10.1021/nl901672b⟩. ⟨hal-00677050⟩
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