Abstract: A method for fabricating a multianalyte detection device. The multianalyte detection device includes a substrate having a plurality of graphene field effect transistor devices each having a source, a drain, and a side gate located thereon. A graphene layer deposited on the substrate to form a plurality of graphene active regions between the source electrode and the drain electrode of each of the plurality of graphene field effect transistors for detection of an analyte therein. A plurality of graphene windows are located on the graphene active regions for receiving a liquid for detecting of the analyte therein. One or more passivation layers are positioned on the substrate to protect the source electrode and the drain electrode for each of the plurality of graphene field effect transistor devices from the liquid received in the plurality of graphene windows.