Capillary Electrophoretic Characterization of Platinum and Silver Nanoparticles in Aqueous Solution Prepared by a Solution Plasma Process

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  • TAKAYANAGI Toshio
    Graduate School of Technology Industrial and Social Sciences Tokushima University
  • HIROSE Taiki
    Graduate School of Science and Technology for Innovation Tokushima University
  • MIZUGUCHI Hitoshi
    Graduate School of Technology Industrial and Social Sciences Tokushima University
  • OKABE Hirotaka
    Sensing System Research Center National Institute of Advanced Industrial Science and Technology
  • MATSUDA Naoki
    Sensing System Research Center National Institute of Advanced Industrial Science and Technology

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<p>Aqueous solutions of platinum nanoparticles (PtNP) and silver nanoparticles (AgNP) were prepared by a solution plasma process in the presence of hydrogen peroxide. Both nanoparticle solutions did not show visible-range photo-absorption by surface plasmon resonance, and capillary zone electrophoresis (CZE) was utilized for the characterization of the nanoparticles. An anionic broad peak was detected with the PtNP by the CZE analysis, whereas both an anionic and an electrically neutral peaks were detected with the AgNP. Serious shot signals attributed to the agglomerate of the nanoparticles were not detected with either the PtNP or the AgNP, and the nanoparticles were stably dispersed in an aqueous solution for at least a few tens of week. Dispersion stability of the nanoparticles was also evaluated in salt solutions, as well as with ethanol co-solvent.</p>

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  • CHROMATOGRAPHY

    CHROMATOGRAPHY 45 (1), 23-29, 2024-02-20

    クロマトグラフィー科学会

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