Fig. 5. MoS2 FET sensor for ultra low concentration glucose sensing. (a) The detection limit of the biosensor based on MoS2 FET observed by the output characteristic curve is 300 nM. (b) Drain current as a function of glucose concentration which ranges from 0 to 1 μM at Vgs of 0.5 V and Vds of 2.5 V. By calculation, the sensitivity of our biosensor has been achieved as high as 260.75 mA mM−1.
