Fig. 1. Schematics of (a) the conventional heterogeneous ECL pathway and (b) the enhanced ‘redox mediated’ pathway in a heterogeneous bead-based immunoassay. The magnetic microbead is represented by the orange sphere while the [Ru(bpy)3]2+ luminophore and the [Ir(sppy)3]3− complex are labelled as Ru2+ and Ir3−, respectively.
