Patent ID: 8900879

Claim:
A sensor for detecting a target of interest comprising: an apparatus for binding the target of interest, the apparatus comprising: a substrate; a material disposed on the substrate; and a probe disposed on the material and configured to bind to the target of interest, wherein the probe is configured on the material to scatter light emitted from a light source when the target of interest is bound to the probe; and a draining unit for draining fluid from the apparatus, comprises: a first opening for connecting with a pump; a second opening for connecting with an outlet of the apparatus, wherein the pump is configured to generate suction for sucking air out of the apparatus, into a chamber of the draining unit and then toward the pump and wherein the first and the second opening are formed on opposite walls of the chamber and are offset from one another; and a blocking unit between the first opening and the second opening, wherein the blocking unit extends from the wall comprising the second opening towards the wall comprising the first opening.