Preparation of highly positively charged silver nanoballs and their stability

Tetsu Yonezawa, Shin Ya Onoue, Nobuo Kimizuka

    Research output: Contribution to journalArticlepeer-review

    81 Citations (Scopus)


    Reduction of AgNO3 by sodium borohydride in the presence of quaternary ammonium disulfide gave a stable aqueous dispersion of silver nanoballs. The obtained Ag nanoballs showed a strong plasmon absorption peak, indicating that they consisted of metal Ag, although the counteranion of the stabilizer was Br-. They are obtainable in a powder form by reprecipitation and can be kept without any change under air. Redispersibility of the obtained powder into water was high, and even in slightly acidic condition, they can be kept stably for more than a week. The stabilization mechanism is also discussed.

    Original languageEnglish
    Pages (from-to)5218-5220
    Number of pages3
    Issue number12
    Publication statusPublished - Jun 13 2000

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Spectroscopy
    • Electrochemistry


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