Preparation of Nafion-Ru(bpy)<sub>3</sub><sup>2+</sup>-Chitosan/Gold Nanoparticles Composite Film and Its Electrochemiluminescence Application
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- QU Yingjuan
- School of Chemistry & Chemical Engineering, Shaanxi Normal University
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- LIU Xiaoli
- School of Chemistry & Chemical Engineering, Shaanxi Normal University
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- ZHENG Xingwang
- School of Chemistry & Chemical Engineering, Shaanxi Normal University
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- GUO Zhihui
- School of Chemistry & Chemical Engineering, Shaanxi Normal University
Bibliographic Information
- Other Title
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- Preparation of Nafion-Ru(bpy)₃²⁺-Chitosan/Gold Nanoparticles Composite Film and Its Electrochemiluminescence Application
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Abstract
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 AuCl4− and Nafion for Ru(bpy)32+, respectively, the gold nanoparticles and electrochemiluminescence (ECL) active molecules, Ru(bpy)32+, were effectively incorporated into the composite film of chitosan with Nafion. Lastly, based on the interaction of Ru(bpy)32+ with Nafion inside the Nafion-chitosan/gold nanoparticles film, Ru(bpy)32+ was successfully immobilized within this composite film. In this case, a new composite film for fabricating Ru(bpy)32+-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)32+ sites; the electrode surface accelerated the charge transport through the composite film, and the diffusion coefficient of Ru(bpy)32+ 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)32+. 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.
Journal
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- Analytical Sciences
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Analytical Sciences 28 (6), 571-576, 2012
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390001204259971840
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- NII Article ID
- 10030757923
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- NII Book ID
- AA10500785
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- COI
- 1:STN:280:DC%2BC38jksVKjsQ%3D%3D
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 023689184
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- PubMed
- 22729042
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed