The electrical properties of cluster-assembled nanostructured palladium oxide (ns-PdOx) thin films grown by supersonic cluster beam deposition have been characterized by means of a customized ac current-sensing atomic force microscope. Scanning impedance microscopy is shown to provide a deep picture of the electrical properties of thin nanostructured interfaces even in the case of very soft and poorly adherent films. In particular, the dielectric constant of ns-PdOx can be quantitatively determined as well as its I-V characteristics. Moreover, the measurement of the tip-sample parasitic capacitance can be exploited to probe the overall mesoscale conductive character of thin films and to give a complementary and more precise view of the oxidation of ns-PdOx obtained by x-ray photoemission spectroscopy.
Titolo: | Nanoscale electrical properties of cluster-assembled palladium oxide thin films |
Autori: | |
Parole Chiave: | Atomic force microscopy ; nanostructured materials ; palladium compounds ; permittivity ; thin films ; X-ray photoelectron spectra |
Settore Scientifico Disciplinare: | Settore FIS/01 - Fisica Sperimentale Settore FIS/03 - Fisica della Materia |
Data di pubblicazione: | 2009 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | 10.1103/PhysRevB.79.115422 |
Appare nelle tipologie: | 01 - Articolo su periodico |