Figure 6.

(a) Normalized capacitance ($\left|\Delta \mathrm{C}\right|$) measured with respect to the concentration of insulin diluted in human serum ($C_{\text{HS}-\text{insulin}}$); (b) $\left|\Delta \mathrm{C}\right|$_{at 4.7 kHz} for insulin concentrations ranging from 1 ng/mL to 10 µg/mL.