1. An integrated circuit for performing a sequencing reaction, the sequencing reaction involving the sequencing of strands of nucleic acids, the integrated circuit comprising: a substrate; an array of graphene field effect transistors arranged on the substrate, each of the graphene field effect transistors comprising: a primary layer forming a base layer; a secondary layer over the primary layer, the secondary layer being formed of a first nonconductive material and comprising a source and a drain formed in the first nonconductive material, the source and drain being separated one from the other by a channel, the source and the drain being formed of an electrically conductive material; and a tertiary layer over the secondary layer, the tertiary layer comprising a gate formed over the channel to electrically connect the source and the drain, the gate being formed of a graphene layer, the tertiary layer further comprising a surface structure that overlaps the source and the drain in the secondary layer, the surface structure further defining a well having side walls and a bottom that extends over at least a portion of the graphene layer of the gate so as to form a reaction chamber for the performance of the sequencing reaction; and a chemically-sensitive bead provided in one or more wells of the array of graphene field effect transistors, each chemically-sensitive bead being configured with one or more reactants to interact with portions of the strands of nucleic acids such that the associated graphene field effect transistor detects a change in ion concentration of the reactants by a change in current flow from the source to the drain via an activation of the graphene layer.