We investigated the electrical transport properties of nanostructured carbon and carbon/titanium oxide nanocomposite films produced by supersonic cluster beam deposition and irradiated by highly focused vacuum UV photon beam. We have observed a relevant increase of the density of states at Fermi level, suggesting that the films acquire a “metallic” character. This is confirmed by the increment of the conductivity of four orders of magnitude for pure nanostructured carbon films and at least eight orders of magnitude for films containing 9 at. % of titanium. A partial reversibility of the process is observed by exposing the modified films to molecular oxygen or directly to air. We demonstrate the capability of writing micrometric conductive strips 2–3 m width and 60 m length and controlling the variation of the conductivity as a function of the titanium concentration.
Electrical conductivity of cluster-assembled carbon/titania nanocomposite films irradiated by highly focused vacuum ultraviolet photon beams / M. Amati, C. Lenardi, R.G. Agostino, T. Caruso, C. Ducati, S. La Rosa, G. Bongiorno, V. Cassina, P. Podestà, L. Ravagnan, P. Piseri, P. Milani. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 101:6(2007), pp. 064314.064314-1-064314.064314-7.
|Titolo:||Electrical conductivity of cluster-assembled carbon/titania nanocomposite films irradiated by highly focused vacuum ultraviolet photon beams|
AMATI, MATTEO (Primo)
LENARDI, CRISTINA (Secondo)
PISERI, PAOLO GIUSEPPE CARLO (Penultimo)
MILANI, PAOLO (Ultimo)
|Parole Chiave:||carbon ; electrical conductivity ; electronic density of states ; nanocomposites ; thin films ; titanium compounds ; ultraviolet radiation effects|
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
Settore FIS/03 - Fisica della Materia
|Data di pubblicazione:||2007|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1063/1.2437658|
|Appare nelle tipologie:||01 - Articolo su periodico|