In biosensing, molecular recognition elements such as antibodies, aptamers, or molecular imprinted polymers are used to selectively bind to target analytes. The binding event often induces a detectable signal (e.g., optical, electrical, or thermal) that is proportional to the concentration of the target molecule. This principle is employed in devices like glucose sensors for diabetic patients, where the recognition of glucose molecules triggers a measurable change in the sensor's properties.
