Enabling Precision Oncology with Software-Driven Graphene Semiconductors

Check4® is a graphene-based semiconductor platform for rapid, amplification-free detection of nucleic-acid biomarkers that is architecturally distinct from graphene field-effect transistor (GFET) biosensors. Rather than relying on gate-modulated transistor behavior, Check4 uses a printed, resistive graphene semiconductor architecture that directly converts molecular binding events into measurable changes in electrical conductance.

Graphene’s atomic thickness and surface-dominated transport enable strong coupling between molecular interactions and electronic response. In the Check4 system, graphene is fabricated as a continuous conductive channel using scalable, wafer-less printing on polymer substrates and functionalized with sequence-specific probes. Binding of complementary nucleic-acid targets perturbs the local electronic environment, producing a reproducible electrical signal without enzymatic amplification, optical labels, or thermal cycling. Sensitivity and single-nucleotide discrimination arise from the intrinsic physics of the graphene–molecule interface rather than transistor gain.

By focusing on direct transport measurements within the graphene channel, Check4 emphasizes simplicity, robustness, and manufacturability. Semiconductor-style electrical metrics, sensor arrays, and algorithmic analysis enable multiplexing and statistical confidence scoring, supporting scalable molecular testing across oncology, infectious disease, and related applications.