Silicon Nanowire FET Biosensor

Label-free electrical diagnostics work by turning a silicon nanowire into a transistor channel gated by whatever binds its receptor-coated surface. This simulator renders that nanowire in 3D with receptor stalks along its length: charged biomarker molecules diffuse through the sample chamber and bind receptors following real Langmuir kinetics, while a translucent Debye-length shell around the wire shows exactly how far a bound charge's electric field actually reaches before the buffer's mobile ions screen it out. Tune ionic strength, target concentration and receptor linker length (antibody vs. aptamer) and watch the live conductance-shift readout — the same trade-off that makes physiological salt the enemy of every real nanowire-FET point-of-care sensor.