Generalized Multiparticle Mie theory is applied in order to study in detail local-field properties of metallic nanoplanets (i.e., a central cluster surrounded by small "satellite" clusters very close to its surface), obtained by ion beam techniques. Strongly asymmetric dimers are chosen as model systems in order to establish the influence of topological parameters such as satellite dimension and distance from the central cluster surface on the local-field enhancement, with calculated enhancement factors as high as similar to 180 in the case of silver. Similar topological configurations are shown to be present in typical nanoplanet systems, with comparable local-field enhancement factors. Simulations for silver and silver-gold alloy in silica, and for gold in titania matrix are reported as examples of possible experimental systems.

Local-field enhancement in metallic nanoplanets

PELLEGRINI, GIOVANNI;MATTEI, GIOVANNI;BELLO, VALENTINA;MAZZOLDI, PAOLO
2008

Abstract

Generalized Multiparticle Mie theory is applied in order to study in detail local-field properties of metallic nanoplanets (i.e., a central cluster surrounded by small "satellite" clusters very close to its surface), obtained by ion beam techniques. Strongly asymmetric dimers are chosen as model systems in order to establish the influence of topological parameters such as satellite dimension and distance from the central cluster surface on the local-field enhancement, with calculated enhancement factors as high as similar to 180 in the case of silver. Similar topological configurations are shown to be present in typical nanoplanet systems, with comparable local-field enhancement factors. Simulations for silver and silver-gold alloy in silica, and for gold in titania matrix are reported as examples of possible experimental systems.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/2447073
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 5
social impact