Extended Data Fig. 6: Design of on-chip chemi-sensor based on graphene ISFETs.
From: Self-powered chemical sensing via graphene, MoS2 and silicon integration
a) Two graphene ISFETs (\({\rm{GI}}1\) and \({\rm{GI}}2\)) connected in series to convert the conductance modulation of graphene ISFETs into a voltage signal that can be directly digitized. The output is read as a voltage (\({{\rm{V}}}_{{\rm{GR}}}\)) at the common terminal. b) optical images of graphene channel in a serpentine layout and c) corresponding current versus voltage measurements for devices with \({{\rm{W}}}_{{\rm{CH}}}\)/\({{\rm{L}}}_{{\rm{CH}}}\) spanning 0.01 to 1. d) Time-resolved voltage readouts from the graphene chemi-sensor for representative analyte cases.
