Biosensor Binding Kinetics Simulator

A biosensor works by pairing a biorecognition layer — enzymes, antibodies, DNA probes or whole cells — with a transducer that turns a binding event into a readable signal. This simulator visualizes the biorecognition step itself: analyte molecules diffuse above a receptor-coated chip and bind or release according to the real Langmuir association/dissociation rate equation (dθ/dt = k_onC(1−θ) − k_offθ), the same model used to fit SPR and QCM sensorgrams in a real lab. Adjust analyte concentration and the k_on/k_off rate constants, then switch between the injection and wash phases to see how affinity (K_d = k_off/k_on) shapes both the equilibrium response and how quickly the signal rises and falls.