Figure 6

Preparation of Ag/AgCl film on a gold electrode: (top) Fluorescence spectra comparing a raw gold electrode with a modified one. It is perceptible the presence of the Ag and Cl after the electrodeposition as well as spurious lines (Ar and Ca); (Bottom) the 2D nanofluorescence map on the modified gold electrode revealing the sites where the Ag nucleated, forming islands-like morphology.The electrode was scanned with a nanobeam of 200 nm \(\times\) 500 nm. The image has a pixel size of 500 nm and an acquisition time of 135 s per image (8 ms per pixel). The scale bar is 5 \(\mu\)m.