Figure 10.
(a) Differential pulse voltammograms of AQMS intercalated onto dsDNA after hybridization with different concentrations of complementary DNA: (1) 1.0 × 10−17, (2) 1.0 × 10−16, (3) 1.0 × 10−15, (4) 1.0 × 10−14, (5) 1.0 × 10−13, (6) 1.0 × 10−12, (7) 1.0 × 10−11, (8) 1.0 × 10−10, (9) 1.0 × 10−9 and (10) 1.0 × 10−8 M; (b) The linear response range of the DNA microbiosensor response. DNA Hybridization was performed at optimum condition of 0.25 M Na-phosphate buffer (pH 7.5) and 2.0 M ionic strength and at 25 °C with 30 min of hybridization time.