Faculty of Technology and Metallurgy

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End date: 2019Subject: search.filters.subject.Raman spectroscopy

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    Thin Layers of Polyaniline/TiO2 Nano-particles Using Electrochemical Deposition
    (World Scientific and Engineering Academy and Society Press, 2007)
    Arsov, Martin
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    Arsov, Ljubomir
    By cycling voltammetry the thin layers of polyaniline on mechanically polished Nb electrode from sulfuric aqueous solutions with aniline added were deposited. During the repetitive voltammetric scans, by simultaneous in-situ Raman spectroscopical measurements, the redox reactions and formation of degradation production in polymer film were investigated. It was found that the new monitored voltammetric waves appear only when the polyaniline reaches an over-oxidized state. The comparative measurements on Pt electrode in sulfuric aqueous solutions with aniline and TiO2 nano-particles added were also performed. It was shown that the TiO2 nano-particles inhibits the formation of degradation products.
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    Electrochemical formation of semi-conducting oxides for solar energy conversion
    (WORLD SCIENTIFIC AND ENGINEERING ACAD AND SOC, 2007)
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    Prusi, Abdurauf
    ;
    Arsov, Ljubomir
    The formation of anodic oxide films on Nb electrodes in 1 M H2SO4 and 1 M KOH, for potential region from 0 to 90 V SCE, have been investigated. The film thickness growth, refractive indices and dielectric constants of formed films, depending of applied potential and time of anodization, have been determined using ellipsometric method. By Raman spectroscopical measurements the amorphous structure of anodic oxide films, up to 10 V SCE and progressive evolution of crystallization from 10 to 90 V has been shown. The semi-conducting properties (n or p tip semi-conductor, energy gap and flat bend potentials) has been determined using photocurrent measurements.