Figure 2
From: Low-coherence photonic method of electrochemical processes monitoring

Optical spectra obtained before and after full electrochemical cycle. Spectra (a) and (b) show two out of five consecutive voltammetric cycles. Note the excellent overlap for the pairs, and the similarity of spectal pairs to each other across the longitudinal measurements, indicating that no significant perturbation appeared during measurements and the investigated sample (2.5 mM K3[Fe(CN)6] in a 0.5 M Na2SO4) was not damaged. The results indicate the successful performance of the BDD film in its dual role of a EC working electrode and an optically reflective layer.