Inelastic Light Scattering by Long Narrow Gold Nanocrystals: When Size, Shape, Crystallinity, and Assembly Matter | Zendy

Hervé Portalès | Zendy; Nicolas Goubet | Zendy; Sandra Casale | Zendy; Xiang Xu | Zendy; Mostapha Ariane | Zendy; A. Mermet | Zendy; Jérémie Margueritat | Zendy; Lucien Saviot | Zendy

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Inelastic Light Scattering by Long Narrow Gold Nanocrystals: When Size, Shape, Crystallinity, and Assembly Matter

Author(s) -

Hervé Portalès,

Nicolas Goubet,

Sandra Casale,

Xiang Xu,

Mostapha Ariane,

A. Mermet,

Jérémie Margueritat,

Lucien Saviot

Publication year - 2020

Publication title -

acs nano

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.554

H-Index - 382

eISSN - 1936-086X

pISSN - 1936-0851

DOI - 10.1021/acsnano.9b09993

Subject(s) - crystallinity , nanocrystal , materials science , scattering , light scattering , nanotechnology , grazing incidence small angle scattering , chemical physics , optics , inelastic scattering , physics , x ray raman scattering , composite material

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 nontotally 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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