Evaluation of Aromatic Boronic Acids as Ligands for Measuring Diabetes Markers on Carbon Nanotube Field-Effect Transistors

Figure 4

Representative partial titration curves showing the peak coating concentrations of aromatic boronic acids on CNT-FET circuits. Detection of bound boronic acids was achieved by measuring the CNT-FET electrical properties in the presence of 5 μg/mL gHSA. From left to right, the curves are pyrene-1 boronic acid (red ⚫), 9-phenanthrene boronic acid (blue ♦), naphthalene-1 boronic acid (black ■), phenyl boronic acid (green ▲). Each partial titration curve shows at least 3 concentrations of the boronic acids with each point measured in quadruplicate ± standard error of the mean.