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TitleElectrical and photocatalytic behaviour of TAOxNy magnetron sputtered thin solid films
Author(s)Cristea, D.
Crisan, A.
Barradas, N. P.
Alves, E.
Costa, P.
Lanceros-Méndez, S.
Cunha, L.
KeywordsTantalum oxynitride
Thin films
Issue date2013
PublisherEditura Stiintifica FMR
JournalMetalurgia International
CitationMetalurgia International vol. XVIII (2013) Special Issue no. 6
Abstract(s)Tantalum oxynitride thin films were deposited by reactive magnetron sputtering in a N2+O2 (85%+15%) atmosphere, with increasing total reactive gas flows. The chemical composition was determined by RBS and the structural development by XRD. The electrical resistivity was measured using the 2-point and 4-point probe techniques. The photocatalytic behavior was determined on glass samples in UV, using methylene-blue as a pollutant. It was observed that, depending on the deposition process parameters, the samples can be divided into 4 zones, each with a characteristic structure and subsequent behavior. The samples from zone I can be attributed to the β-Ta phase, metallic, conductive. The samples from zone II can be attributed to a fcc Ta(O, N) structure, with N/Ta higher than O/Ta, with increasing electrical resistivity. The samples from zone III are oxide-like, amorphous, electrically insulating.
AccessRestricted access (UMinho)
Appears in Collections:CDF - GRF - Artigos/Papers (with refereeing)

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