MORPHOLOGICAL ELEMENTS OF THERuO2·TiO2COATING AS DISPLAYED AT DIFFERENT SCALE LEVELS AND POSSIBLE MODELS OF ITS CONDUCTIVITY

N. B. Kondrikov (), E. V. Shchitovskaya, M. S. Vasilyeva, V. G. Kuryavy and V. M. Bouznik
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N. B. Kondrikov: Far East State University, Vladivostok, Russia
E. V. Shchitovskaya: Far East State University, Vladivostok, Russia
M. S. Vasilyeva: Far East State University, Vladivostok, Russia
V. G. Kuryavy: Institute of Chemistry, FEDRAS, Vladivostok, Russia
V. M. Bouznik: Institute of Chemistry, FEDRAS, Vladivostok, Russia

Surface Review and Letters (SRL), 2003, vol. 10, issue 01, 101-104

Abstract: The roughness elements displayed at different scales on theRuO2·TiO2(ORTA) coating obtained by means of calcination on a titanium support were studied with the methods of electronic scanning microscopy and scanning tunneling microscopy. Two models for the emergence of the electronic conductivity, possible for different ORTA components, were discussed on the basis of the scanning tunneling microscopy data. One of the models, formerly known as the "islet" model, assumes the simultaneous presence of conducting nanoclusters ofRuO2and nonconducting clusters ofTiO2separated in space. Another model assumes the presence of similar volume-conducting nanoclusters of cross-size ~ 1 nm, every one of which is a solid solution ofRuO2·TiO2composed in such a way as to have the Fermi level common forRuO2andTiO2.

Keywords: Surface; coating; morphology; nanoclusters; conductivity structural organization; fractal (search for similar items in EconPapers)
Date: 2003
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DOI: 10.1142/S0218625X03004639

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