Figure 4: (a) Redox behavior of Ru3+ on Aptamer-NH-CO-SWCNT/gc electrode at different scan rates between the potential window 0 mV to -700 mV in tris-buffer (pH 7.4). (b) Corresponding Randles-Sevcic plot for (a): variation of anodic and cathodic peak current at different SQRT of scan rates (mVs-1).