  This paper provides an overview on graphene solution-gated field effect
transistors (SGFETs) and their applications in bioelectronics. The fabrication
and characterization of arrays of graphene SGFETs is presented and discussed
with respect to competing technologies. To obtain a better understanding of the
working principle of solution-gated transistors, the graphene-electrolyte
interface is discussed in detail. The in-vitro biocompatibility of graphene is
assessed by primary neuron cultures. Finally, bioelectronic experiments with
electrogenic cells are presented, confirming the suitability of graphene to
record the electrical activity of cells.
