Figure 5
From: Chemically Functionalised Graphene FET Biosensor for the Label-free Sensing of Exosomes
(a) Ids − Vg curve of a functionalised gFET sensor with PBS (black trace) and 10 μg/mL exosomes in 0.001X PBS measured at room temperature over 30 minutes (coloured traces). (b) Ids − Vds measurement for the preliminary 10 μg/mL measurement at various constant Vg after 30 minutes of exosome binding. (c) Shift in the additional minimum relative to the PBS reference value for 3 different exosome concentrations performed over 3 samples each, where Vt − VPBS values were averaged for each time point. Error bars denote ± one standard deviation of averaged Vt − VPBS values obtained for 3 samples for each concentration.
