Sensor for detection of a target of interest

摘要

A sensor for detecting a target of interest comprises a light source that emits light, a light receiver for receiving light, a sampling unit disposed between the light source and the ligh receiver for binding the target of interest (901), a light selecting unit for allowing light of a predetermined wavelength be received by the light receiver, and a detector configured to generate an electrical signal, and the magnitude of which reflects the amount of light that is received by the light receiver. The sampling unit comprises a substrate (110), a material (111) disposed on the substrate, and a probe (113) disposed on the material and configured to bind to the target of interest. The sampling unit is configured such that the probe is in the path of the light emitted by the light source so that the light is scattered if the target binds to the probe.