Why the aspect ratio? Shape equivalence for the extinction spectra of gold nanoparticles

Regular Article

Abstract.

We compare the light extinction spectra of elongated gold nanoparticles with different shapes (cylinder, spherocylinder and ellipsoid) and sizes of 10 to 100nm. We argue that the equivalence of the various moments of mass distribution is the natural comparison criterion —rather than the length-to-diameter (aspect) ratio generally used in the literature— and that it leads to better spectral correspondence between the various shapes.

Graphical abstract

Keywords

Soft Matter: Colloids and Nanoparticles 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Laboratoire de Physique des SolidesCNRS, Univ. Paris-Sud, Université Paris-SaclayOrsay CedexFrance

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