Electrochemical and electrochemiluminescent behaviors of a single Nafion@Ru or Au-Nafion@Ru nanoparticle colliding onto an ultramicroelectrode
| Autor: | Haiqiang Deng, Yan Li, Meizhou Liu, Wanqiao Bai |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering Nanoparticle chemistry.chemical_element Ultramicroelectrode Propylamine General Chemistry Electrochemistry Biochemistry Ruthenium chemistry.chemical_compound Chemical engineering chemistry Nafion Materials Chemistry Electrochemiluminescence Luminescence |
| Zdroj: | SCIENTIA SINICA Chimica. 51:374-382 |
| ISSN: | 1674-7224 |
| Popis: | Nafion and Au-Nafion nanoparticles (NPs) are electrostatically loaded with ruthenium (II) tris(2,2’-bipyridyl) (Ru(bpy)32+) luminescent molecules to prepare Nafion@Ru and Au-Nafion@Ru NPs. The average spike current, peak charge and duration per spike of the response peaks generated by random collisions of Au-Nafion@Ru NPs and Nafion@Ru NPs on gold ultramicroelectrodes (Au UME) were analyzed and compared, and an electrochemical collision system with Au-Nafion@Ru NPs as the main body was established. The results show that the prepared Au-Nafion@Ru NPs possess the special structure of Au-Nafion@Ru, which can increase the effective contact or collision sites between NPs and Au UME with the co-participation of Nafion and AuNPs, resulting in an enhanced electrochemical collision response signal. In the system of Au-Nafion@Ru NPs-tri- n -propylamine (TPrA), the time-current curve and electrochemiluminescence (ECL)-time method were used to monitor the electrical and ECL transient signals generated by Nafion@Ru or Au-Nafion@Ru NPs colliding with Au UME, and a good relationship between electrochemical and ECL transient signals generated by the collisions of single Au-Nafion@Ru NPs-TPrA on Au UME was established. This strategy provides a new insight for studying the electrochemical collision systems of other molecules. |
| Databáze: | OpenAIRE |
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