Figure 3: Cyclic voltammograms recorded in 10 mM K3[Fe(CN)6] in 0.1M KCl. The potential was swept in the range between -0.25 and 0.7 V (vs Ag/
AgCl) with a sweep rate of 0.1 V s-1: an inset (a) bare gold electrode (blue); (b) gold electrode modified with polytyramine layer (red); (c) the same as
(b) after immobilization of 30-mer E. coli 16Ss rDNA (black); (d) as in (c) after treatment with 1-dodecanethiol (green).