Electrochemical behaviour of suspended redox-tagged carbon nanotubes at a rotating disc electrode

Abstract

Although the electrochemical behaviour of an aqueous dispersion of nanometer-sized redox active nanoparticles has recently received some attention, there are very few such studies of larger objects. Here, we present a study of the electrochemical behaviour of an aqueous dispersion of redox (2,2′-azino-bis-(3-ethylbenzothiazoline)-6-sulfonate)-tagged multiwalled carbon nanotubes at a rotating disc electrode. The electrochemical signal related to adsorbed redox-tagged nanotubes was recorded by cyclic voltammetry, while the signal related to collisions of their agglomerates or aggregates was detected using chronoamperometric methods. Keywords: Multiwalled carbon nanotubes, Rotating disc electrode, Collisions, ABTS, Voltammetry, Chronoamperometry