Premium
A Comparison of Differently Synthesized Gold‐coated Magnetic Nanoparticles as ‘Dispersible Electrodes’
Author(s) -
Moraes Silva Saimon,
Tavallaie Roya,
Tanzirul Alam Muhammad,
Chuah Kyloon,
Gooding J. Justin
Publication year - 2016
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201500530
Subject(s) - electrode , electrochemistry , x ray photoelectron spectroscopy , materials science , cyclic voltammetry , transmission electron microscopy , nanoparticle , magnetic nanoparticles , nanotechnology , scanning electron microscope , chemical engineering , colloidal gold , chemistry , composite material , engineering
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.