Fig. 3. (a) CV at the bare carbon TFT underlay (DuPont BQ221) (dashed line) and MWCNTs/DMF modified electrode (continuous
line) in 0.05 mol.L-1 phosphate buffer solution (pH 7.4) using a scan rate of 50 mV.s-1; (b) CV response of MWCNTs/DMF
modified electrode to buffer solution (dashed line) and to 10 ȝmol.L-1 insulin solution (continuous line) using a scan rate of
50 mV.s-1