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Gold-coated magnetic nanoparticles as “dispersible electrodes” – Understanding their electrochemical performance by Leo M.H. Lai; Ian Y. Goon; May Lim; D. Brynn Hibbert; Rose Amal; J. Justin Gooding is a Engineering article available to read on EtoBox.
What is Gold-coated magnetic nanoparticles as “dispersible electrodes” – Understanding their electrochemical performance about?
The gold-coated magnetic nanoparticles (Au@MNPs) have been proposed to act as ''dispersible electrodes'' in sensing applications with the dual advantages of reduced detection time and increased sensitivity. As a sensor the Au@MNPs would be modified with ligands to capture the analyte, with exposure of a magnetic field bringing the nanoparticles back to a macroelectrode for electrochemical detection of the amount of analyte. In this paper, the potential of Au@MNPs as dispersible electrodes is assessed via (1) characterization of how they assemble onto a macroelectrode upon application of a magnetic field, (2) their electron transfer behaviour to redox species in solution and redox species attached to the Au@MNPs and (3) how low a detection limit is possible. Visualization with atomic force (AFM), scanning electron (SEM) and light microscopy showed the particles formed a coral-like structure on the electrode. Electron transfer kinetics of the Au@MNPs-modified electrode was shown to be similar to a bare electrode by both cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrochemistry of the Os(bpy) 2 (AMP) modified Au@MNPs enabled an estimation of the sm
Who reads Gold-coated magnetic nanoparticles as “dispersible electrodes” – Understanding their electrochemical performance?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Leo M.H. Lai; Ian Y. Goon; May Lim; D. Brynn Hibbert; Rose Amal; J. Justin Gooding
- Publisher
- Elsevier ; Elsevier BV (ISSN 1572-6657)
- Published
- 2011
- Language
- EN
- Field
- Engineering (Physical Sciences)