Morphology of gold nanoparticles determined by full-curve fitting of the light absorption spectrum. Comparison with X-ray scattering and electron microscopy data - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nanoscale Research Letters Année : 2014

Morphology of gold nanoparticles determined by full-curve fitting of the light absorption spectrum. Comparison with X-ray scattering and electron microscopy data

Résumé

UV-Vis absorption spectroscopy is frequently used to characterize the size and shape of gold nanoparticles. We present a full-spectrum model that yields reliable results for the commonly encountered case of mixtures of spheres and rods in varying proportions. We determine the volume fractions of the two populations, the aspect ratio distribution of the nanorods (average value and variance) and the interface damping parameter. We validate the model by checking the fit results against small-angle X-ray scattering and transmission electron microscopy data and show that correctly accounting for the polydispersity in aspect ratio is essential for a quantitative description of the longitudinal plasmon peak.
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Dates et versions

hal-01077299 , version 1 (07-01-2015)

Licence

Paternité - Pas d'utilisation commerciale - Pas de modification

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Kostyantyn Slyusarenko, Benjamin Abécassis, Patrick Davidson, Doru Constantin. Morphology of gold nanoparticles determined by full-curve fitting of the light absorption spectrum. Comparison with X-ray scattering and electron microscopy data. Nanoscale Research Letters, 2014, 6 (22), pp.13527 - 13534. ⟨10.1039/c4nr04155k⟩. ⟨hal-01077299⟩
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