In (a) the schematics of the gate pillars illustrating the chem-SAM, the capturing recognition elements (anti-MUC1, b-KRASmut, and anti-CD55), and their affinity ligands, are shown. The rightmost panel shows the data taken with BSA biofunctionalized gates serving in the negative control experiments. In the other panels, the assays of the MUC1, KRASmut, and CD55 are sequentially (left to right) featured. The dots are the data points relevant to theIDvalues (left axis), and their relative changes, ΔI/I0= (I−I0)/I0(right axis, currents measured in water atVGS= −0.5 V,VD= −0.4 V) vs cycles (topx-axis) and time (bottomx-axis), during 20 cycles (2.5 min).
