Ultra low-cost optical biosensor based on guided mode resonance grating filter

Design and development of ultra low-cost, disposable devices for point-of-care diagnostics is the focus of scientific community in these days. In this work we propose a simple fabrication strategy, using non-conventional, low-cost, polycarbonate based micro-structured device which is supposed to be a low-cost, but highly sensitive sensing device for disposable bio-applications. The initial studies focused on the possibility of finding the concentration of sugar, the analyte, in honey being the sample using guided mode resonance grating filter (GMRGF) based biosensor, for both homogeneous as well as surface sensing. The sensitivity of 142nm/RIU and 23nm/RIU has been observed for homogeneous and surface sensing respectively.