http://www.cnr.it/ontology/cnr/individuo/prodotto/ID21413
Photoelectrochemical imaging of non-planar surfaces: the influence of geometrical and optical factors on image formation. (Articolo in rivista)
- Type
- Label
- Photoelectrochemical imaging of non-planar surfaces: the influence of geometrical and optical factors on image formation. (Articolo in rivista) (literal)
- Anno
- 2002-01-01T00:00:00+01:00 (literal)
- Alternative label
Maffi S., Lenardi C., Bozzini B., Peraldo Bicelli L. (2002)
Photoelectrochemical imaging of non-planar surfaces: the influence of geometrical and optical factors on image formation.
in Measurement science & technology (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Maffi S., Lenardi C., Bozzini B., Peraldo Bicelli L. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- CESPEL-CNR Dipartimento di Chimica Fisica Applicata, Politecnico di Milano Via Mancinelli 7, 20131 Milano Italy
Dipartimento di Ingegneria dell'Innovazione, Università di Lecce, via Monteroni, 73100 Lecce, Italy (literal)
- Titolo
- Photoelectrochemical imaging of non-planar surfaces: the influence of geometrical and optical factors on image formation. (literal)
- Abstract
- In situ scanning photoelectrochemical (PEC) microscopy is a technique for
mapping the photocurrent stimulated by a focused light at an electrode-
electrolyte interface. This technique gives position-sensitive information
on the nature of passivating films (composition, type and degree of
crystallization, thickness, etc.) that cover metal electrodes. In the
analysis of PEC images, further aspects related to the surface shape
and/or surface irregularities (roughness, slope errors, surface waviness,
etc.) have to be taken into account. In this paper we present the effects
of non-planar surface by measuring the photoresponse of passivating oxide
films on cylidrical iron rods with different diameters. The variation of
the angle of incidence of the light, as the laser beam scans the surface
of the rod, implies either a change in the spot size and different optical
response on the oxide-metal system, such as the transmittivity of the
oxide, the reflectivity of the metal and the light path inside the film.
For evaluating the behaviour of the photocurrent, we have simulated these
geometrical and optical effects by using a simple model in geometrical
optics approximation. Images have been also acquired at various distances
from the beam focus for highlighting the degradation to the spatial
resolution induced by the focusing misalignment of the curved samples. (literal)
- Prodotto di
- Autore CNR
Incoming links:
- Prodotto
- Autore CNR di
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
