Effects of magnetic processing on electrochemical and photoelectrochemical properties of electrodes modified with nanoclusters of a phenothiazine-C 60 linked compound

H. Yonemura, Y. Wakita, S. Moribe, S. Yamada, Y. Fujiwara, Y. Tanimoto

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    Abstract

    Effects of magnetic processing on morphological, electrochemical, and photoelectrochemical properties of electrodes modified with nanoclusters of a phenothiazine-C60 linked compound with four methylene group (Ph(4)C60) were examined in the absence and presence of magnetic processing with three different magnetic environments due to strong magnetic field. The AFM measurements indicated that the morphologies of nanostructures of Ph(4)C60 varied with magnetic enviroments as comparison with that in the absence of magnetic processing. At top position (5.6 T; - 940 T 2/m) with hypogravity, large spherical nanoclusters (60∼70 nm diameter) were observed as comparion with those (ca. 20 nm diameter) in the absence of magnetic processing. At middle positon (15 T; 0 T2/m) with normal gravity, the fiber-like nanostructure was observed. At bottom position (9.8 T; + 1070T2/m) with hypergravity, the rod-like nanostrucure was observed. The interesting results might be ascribed to the different solvent properties due to the different rates of evaporation of two solvents in the toluene-acetonitrile mixed solvent during drying process under various magnetic environments. First reduction peaks due to C60 moiety of Ph(4)C 60 nanostrucures in the presence of magnetic processing at three different positions were negative-shifted as comparison with that in the absence of magnetic processing. Potential dependencies of the photocurrents of the electrodes modified with Ph(4)C60 nanostrucures in the presence of magnetic processing at three positions were also different from that in the absence of magnetic processing. The magnetic field effects in AFM, and electrochemical and photoelectrochemical measurements are most likely ascribed to the difference of the reduction potentials due to C60 clusters between the absence and presence of magnetic processing due to the morphological change of Ph(4)C60 nanostrucures.

    Original languageEnglish
    Article number012026
    JournalJournal of Physics: Conference Series
    Volume156
    DOIs
    Publication statusPublished - 2009

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

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