Title :

Surface asymmetry of coated spherical nanoparticles

Author(s) :

Koch, Amélie H.R. [Auteur]
Max Planck Institute for Polymer Research
Lévêque, Gaëtan [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Harms, Sebastian [Auteur]
Jaskiewicz, Karmena [Auteur]
Max Planck Institute for Polymer Research
Bernhardt, Max [Auteur]
Max Planck Institute for Polymer Research
Henkel, Andreas [Auteur]
Sönnichsen, Carsten [Auteur]
Landfester, Katharina [Auteur]
Max Planck Institute for Polymer Research
Fytas, George [Auteur]
Max Planck Institute for Polymer Research

Journal title :

Nano Letters

Pages :

4138-4144

Publisher :

American Chemical Society

Publication date :

2014

ISSN :

1530-6984

English keyword(s) :

plasmonics
grafted gold nanospheres
depolarized light scattering
shape anisotropy
nanospheres
extinction

English abstract : [en]

We validate the nonspherical grafting arrangement of isotropically coated spherical nanoparticles as very recently proposed. We utilize localized surface plasmon resonance enhanced dynamic polarized and depolarized light ...
Show more >We validate the nonspherical grafting arrangement of isotropically coated spherical nanoparticles as very recently proposed. We utilize localized surface plasmon resonance enhanced dynamic polarized and depolarized light scattering from Au nanoparticles, the spherical symmetry of which was revealed by single-particle dark-field spectroscopy. The same Au nanospheres are grafted with ligands of different chemistry and length. The wavelength dependent depolarization ratio and the two transport coefficients of these nanoparticles, obtained from the dynamic light scattering experiment, can only be reconciled with the TEM data, the single UV/vis extinction spectrum, and the dark-field spectroscopy experiments if their coating is described as asymmetric. Spatially anisotropic graft distribution on spherical nanoparticles impacts their assembly and understanding its origin will help control the structure and properties of polymer nanocomposites.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Non spécifiée

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL