Preparation of Nafion-Ru(bpy)₃²⁺-Chitosan/Gold Nanoparticles Composite Film and Its Electrochemiluminescence Application Preparation of Nafion-Ru(bpy)_3^<2+>-Chitosan/Gold Nanoparticles Composite Film and Its Electrochemiluminescence Application

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In this research, it was found that a composite film could be formed by mixing Nafion with chitosan on the graphite electrode surface. Then, based on the strong absorption of both chitosan for AuCl<sub>4</sub><sup>−</sup> and Nafion for Ru(bpy)<sub>3</sub><sup>2+</sup>, respectively, the gold nanoparticles and electrochemiluminescence (ECL) active molecules, Ru(bpy)<sub>3</sub><sup>2+</sup>, were effectively incorporated into the composite film of chitosan with Nafion. Lastly, based on the interaction of Ru(bpy)<sub>3</sub><sup>2+</sup> with Nafion inside the Nafion-chitosan/gold nanoparticles film, Ru(bpy)<sub>3</sub><sup>2+</sup> was successfully immobilized within this composite film. In this case, a new composite film for fabricating Ru(bpy)<sub>3</sub><sup>2+</sup>-based ECL sensors was developed. The performances of this composite film were characterized by transmission electron microscopy (TEM), electrochemistry and electrochemiluminescence methods. Our results showed that: firstly, the gold nanoparticles in the resulting composite film could act as conducting pathways to connect Ru(bpy)<sub>3</sub><sup>2+</sup> sites; the electrode surface accelerated the charge transport through the composite film, and the diffusion coefficient of Ru(bpy)<sub>3</sub><sup>2+</sup> within this composite film modified electrode was 65 times higher than that of the pure Nafion film modified electrode. Secondly, due to its unique polymeric cationic character and better film-forming properties, chitosan could improve the compact structure of pure Nafion and greatly enhance the mass-transfer speed of Ru(bpy)<sub>3</sub><sup>2+</sup>. Then, the co-reactant tripropylamine (TPA) inside the composite film could offer better ECL performances such as more rapid ECL response speed, longer-term stability and higher sensitivity compared with the performances of pure Nafion film.

収録刊行物

  • Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

    Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 28(6), 571-576, 2012-06-10

    The Japan Society for Analytical Chemistry

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各種コード

  • NII論文ID(NAID)
    10030757923
  • NII書誌ID(NCID)
    AA10500785
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09106340
  • NDL 記事登録ID
    023689184
  • NDL 請求記号
    Z54-F482
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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