Nanostructured artificial atom solids by C49- phase TiSi2 nanoparticles embedded in Si polycrystalline matrices were fabricated by a self-assembling methodology, based on the annealing of Si/Ti multilayers.We demonstrate that the annealing process of the multilayers is a suitable methodology to tune the electronic transport mechanism, since by an appropriate choice of the annealing parameters (temperature and time) it is possible to tailor the mean nanoparticle size, the surface-to-surface distance and their dispersion. As a consequence, the array charging energy, the array structural disorder and the electronic coupling between the nanoparticles can be tailored and the transport properties can be varied from insulating to metallic regimes. This behavior is shown to be consistent with the Mott–Hubbard model for the description of the electronic structure in artificial atom solids.

Tuning the electron transport mechanism in metal nanoparticles arrays by the manipulation of the electronic coupling and structural disorder

RUFFINO, FRANCESCO;PICCITTO, Giovanni;GRIMALDI, Maria Grazia;
2009-01-01

Abstract

Nanostructured artificial atom solids by C49- phase TiSi2 nanoparticles embedded in Si polycrystalline matrices were fabricated by a self-assembling methodology, based on the annealing of Si/Ti multilayers.We demonstrate that the annealing process of the multilayers is a suitable methodology to tune the electronic transport mechanism, since by an appropriate choice of the annealing parameters (temperature and time) it is possible to tailor the mean nanoparticle size, the surface-to-surface distance and their dispersion. As a consequence, the array charging energy, the array structural disorder and the electronic coupling between the nanoparticles can be tailored and the transport properties can be varied from insulating to metallic regimes. This behavior is shown to be consistent with the Mott–Hubbard model for the description of the electronic structure in artificial atom solids.
2009
TiSi2 nanoparticles; Si; Electrical transport
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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: https://hdl.handle.net/20.500.11769/6960
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact