Fig. 3. Side-view images of a 12 μm polystyrene bead labelled with the [Ru(bpy)3]2+ complex recorded in 0.01 M PB solution using (a) PL (green) and (b) ECL (red) modes. Experimental ECL intensity profiles along the (c) vertical y-axis and (d) horizontal x-axis. The hatched zone represents the luminescence reflection on the electrode surface. The origin O of the two axes corresponds to the electrode surface (y = 0) and to the middle of the bead (x = 0). The y-axis is the symmetry axis passing through the middle of the bead. Applied potential: 1.4 V vs. Ag/AgCl. Scale bar: 10 μm.
