Optochemical Sensors

Fabrication and functional analysis of SPARROW biosensor

“…The conductometric sensors have relatively low sensitivity compared to amperometric sensors. 2) Fabry-Pérot-Based Microspectrometer (FPI): This device consists of two partially reflecting, low-loss, and parallel mirrors separated by a gap [17]. If this gap is equal to multiples of half a wavelength of the incident light then a series of sharp resonant transmission peaks due to multiple reflections of the light in the cavity occurring through the mirrors.…”

“…Fabrication steps include wafer fusion bonding then etching is done to achieve movable mesa, again etching is performed to achieve the gap and control electrode spacing, and finally to multilayer dielectric mirror layers and control electrodes have to be deposited [17]. Applications include gas sensors to monitor carbon monoxide and hydrocarbons.…”

“…The output signal measured from the transducer is light. This technique uses characteristic properties of the electromagnetic waves like amplitude, frequency, state of polarization, phase, andscattering[17]. The biosensor can be made based on electrochemiluminescence, surface plasmon, resonance, reflectometric interference spectroscopy, and grating couplers.…”