A Comparison of Differently Synthesized Gold‐coated Magnetic Nanoparticles as 'Dispersible Electrodes'. Issue 3 (25th September 2015)

• Record Type: Journal Article
• Authors: Moraes Silva, Saimon; Tavallaie, Roya; Tanzirul Alam, Muhammad; Chuah, Kyloon; Gooding, J. Justin
• Is Part Of: Electroanalysis. Volume 28:Issue 3(2016)
• Page Start: 431
• Page End: 438
• Publication Date: 2015-09-25
• Subjects: Gold‐coated magnetic nanoparticles -- dispersible electrodes -- electrochemical properties -- sensing interface -- assembly; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201500530
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: Gold‐coated magnetic nanoparticles (Au@MNPs) have attracted significant interest in electrochemistry in recent years. This is especially the case with their application as dispersible electrodes where modified Au@MNPs are dispersed into a solution, selectively bind to the analyte of interest and are then brought to an electrode via application of a magnetic field for measurement. This paper characterizes four types of Au@MNPs with different sizes, shapes, and method of synthesis as dispersible electrodes. The Au@MNPs were characterized by transmission electron microscopy and X‐ray photoelectron spectroscopy and scanning electron microscopy. In addition, the electrochemical behaviour of Au@MNPs was investigated using cyclic voltammetry. The four sorts of Au@MNPs were evaluated with regards to the three main features required in the dispersible electrodes approach, well‐defined morphology, well‐defined electrochemistry and fast response to a magnetic field. The Cubic‐Au@MNPs, which presents the simplest synthetic route, showed the best electrochemical stability and performance, responding quickly to a magnet and had a well defined shape. Abstract :