947637.fig.0011
Figure 11: Cyclic voltammograms (second scan) obtained with ITO electrode coated by (i) one, (ii) three, (iii) six, and (iv) nine immersion and withdrawal steps alternatively into suspension of negatively and positively charged carbon nanoparticles, followed by bilirubin oxidase adsorption. Experiments were performed in dioxygen-saturated 0.1 mol dm−3 phosphate buffer (pH 4.8). Scan rate 0.001 V s−1 (from [13]).