Inelastic light scattering by long narrow gold nanocrystals: when size, shape, crystallinity and assembly matter - Archive ouverte HAL Access content directly
Journal Articles ACS Nano Year : 2020

Inelastic light scattering by long narrow gold nanocrystals: when size, shape, crystallinity and assembly matter

Abstract

We report the synthesis of long narrow gold nanocrystals and the study of their vibrational dynamics using inelastic light scattering measurements. Rich experimental spectra are obtained for monodomain gold nanorods and pentagonal twinned bipyramids. Their assignment involves diameter-dependent non-totally symmetric vibrations which are modeled in the framework of continuum elasticity by taking into account simultaneously the size, shape and crystallinity of the nanocrystals. Light scattering by vibrations with angular momenta larger than 2 is reported. It is shown to increase with the ratio of the nanocrystals diameter to the interparticle separation. It originates from the plasmonic coupling due to the self-assembly of the nanocrystals after deposition.
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Dates and versions

hal-02566470 , version 1 (07-05-2020)

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Hervé Portalès, Nicolas Goubet, Sandra Casale, Xiang Zhen Xu, Mostapha Ariane, et al.. Inelastic light scattering by long narrow gold nanocrystals: when size, shape, crystallinity and assembly matter. ACS Nano, 2020, 14 (4), pp.4395-4404. ⟨10.1021/acsnano.9b09993⟩. ⟨hal-02566470⟩
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