SEARCH Articles Figures Tables Affinity biosensors chemicals Affinity biosensors compounds Affinity biosensors concentrations Affinity biosensors derivatives Affinity biosensors electrochemical immobilization Affinity biosensors proteins Affinity-based biosensors Antibodies affinity biosensors Antigens affinity biosensors Biosensors affinity Biosensors affinity Biosensors affinity ligand-based Surface affinity biosensors Surface plasmon resonance affinity biosensor