Abstract: A sensor for performing measurements is disclosed. It comprises: a substrate; a plurality of graphene field-effect transistors (GFET) deposited on a central area of the substrate; at least one source electrode connected to the GFETs through at least one first metal track, wherein the at least one source electrode is disposed at the periphery of the substrate; at least one drain electrode connected to the GFETs through at least one second metal track, wherein the at least one drain electrode is disposed at the periphery of the substrate; and at least one gate electrode, disposed at least in part at the center of the substrate, wherein, in use of the sensor, when a sample is deposited in contact with the gate electrode and the GFETs, the sample allows gating between the gate electrode and the GFETs.

Abstract: A sensor (20, 200, 1200, 30) for performing measurements is disclosed.