Figure 2.
a) Ids versus Vg using the liquid gate before (red) and after (blue) exposure to streptavidin of 100 nM in 0.01× PBS. b) Plots of current versus time in PBS of different levels of dilution. The devices were exposed to 100 nM streptavidin at t = 100 s. Vds of 0.2 V and Vg of 0.6 V were used for the measurement. c) Relative responses extracted from Figure 2b plotted against the logarithm of the ionic concentration.