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Effects of preparation conditions on the synthesis of nano-sized Ag metal particles by the wet-process using 3-mercapto-propionic acid

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Abstract

By the addition of sodium borohydride as a reducing agent into an aqueous solution of AgNO3 mixed with 3-mercapto-propionic acid as a protective agent, nano-sized Ag metal particles could be synthesized. Using this advanced wet-process the synthesis of an aqueous Ag colloid system with a high density became possible, because the surfaces of the synthesized nano-sized Ag metal particles were covered and protected by the adsorbed 3-mercapto-propionic acid. By changing the mix ratio of AgNO3 to 3-mercapto-propionic acid, the particle size of synthesized nano-sized Ag metal particles could be controlled; a higher 3-mercapto-propionic acid/AgNO3 ratio was preferable in the synthesis of smaller Ag metal particles. From the relationship between the Ag metal particle size and the residual S content adsorbed on the metal particles, the mechanism of dispersion of Ag particles can be proposed as that the 3-mercapto-propionic acid having a thiol group adsorbs on Ag particles by forming Ag-S bonds as a protective agent.

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Authors and Affiliations

  1. Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, 565-0871, Suita, Osaka, Japan

    Masanori Tomonari, Kohsuke Mori & Hiromi Yamashita

  2. Functional Materials R & D Division, R & D Strategy Head quarters, Ishihara Sangyo Kaisha, Ltd., Yokkaichi, Mie, Japan

    Masanori Tomonari, Kiyonobu Ida & Hironori Imanishi

  3. Department of Chemistry, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Hongou, Tokyo, Japan

    Tetsu Yonezawa

Authors
  1. Masanori Tomonari
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  2. Kiyonobu Ida
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  3. Hironori Imanishi
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  4. Tetsu Yonezawa
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  5. Kohsuke Mori
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  6. Hiromi Yamashita
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Correspondence to Hiromi Yamashita.

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Tomonari, M., Ida, K., Imanishi, H. et al. Effects of preparation conditions on the synthesis of nano-sized Ag metal particles by the wet-process using 3-mercapto-propionic acid. Res. Chem. Intermed. 34, 641–647 (2008). https://doi.org/10.1163/156856708784795608

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  • DOI: https://doi.org/10.1163/156856708784795608

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